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Documentation
  • wiring Wiring
    • Serial Bus
      • Bus Extender
        • Optical Isolation
          • Surge Protection
            • PWM Converter
              • Modbus RTU
                • CT clamp (0-10V)
                • applications Applications
                  • Settings
                    • App Settings
                      • Keyboard shortcuts
                        • Drag & Drop
                          • Windows 7, 8
                            • Kiosk Mode
                              • Siri & Widgets
                                • Push notifications and Doorbell
                                • initial-setup Initial Setup
                                  • Requirements
                                    • First steps
                                      • LED indicators
                                        • Bus Analyzer
                                        • functional-areas Functional areas
                                          • Heating / Cooling
                                            • Modes
                                            • Equithermic
                                            • Circulation Pump
                                            • Boiler Cascade
                                            • PID Cascade
                                          • Irrigation
                                            • Rainfall measurement
                                          • Blinds
                                            • Calibration Wizard
                                            • Azimuth
                                            • DC Blinds
                                          • Lighting
                                            • PWM Dimming
                                            • Dimming
                                          • Alarm
                                          • configuration Configuration
                                            • Dashboards and Zones
                                              • Bulk Edit
                                                • Custom Icons
                                                  • Users
                                                    • Device log
                                                      • Statistic Values
                                                        • Make.com
                                                          • Button Speed
                                                            • Conversions
                                                              • Date Periods
                                                                • Actions
                                                                  • iPad Power
                                                                    • Multiple Cores
                                                                      • Network architecture
                                                                        • Hysteresis Equation
                                                                          • Export descriptions
                                                                            • Impulse meter
                                                                            • applications Smart Rules
                                                                              • Default Values and Manual Override
                                                                                • Scheduler
                                                                                  • Delay
                                                                                    • Energy Manager
                                                                                      • Blinds Adjustment According to Sun
                                                                                        • Light Controller
                                                                                          • Protect Blinds from Wind
                                                                                            • Condition
                                                                                              • Presence Simulation
                                                                                                • Push Button Blind Control
                                                                                                  • Light Scene
                                                                                                    • Window Open Notification
                                                                                                      • Limiting Condition
                                                                                                        • Triggers
                                                                                                        • integration Hardware Integration
                                                                                                          • Packet Parser
                                                                                                            • Automatic
                                                                                                            • Manual
                                                                                                            • MQTT
                                                                                                          • Modbus
                                                                                                            • Simple
                                                                                                            • Multiple Meters
                                                                                                          • Air Conditioning
                                                                                                            • KNX
                                                                                                              • KNX devices
                                                                                                              • Configuring
                                                                                                            • DALI
                                                                                                              • SIP Video Doorbell
                                                                                                                • 2N
                                                                                                                • Configuration
                                                                                                                • Akuvox
                                                                                                                • DoorBird
                                                                                                              • Velux
                                                                                                                • DMX
                                                                                                                • expose-devices Expose Devices
                                                                                                                  • Alexa
                                                                                                                    • TapHome API
                                                                                                                      • Home Assistant
                                                                                                                        • Modbus
                                                                                                                          • Integration
                                                                                                                            • KNX
                                                                                                                            • script-language Script Language
                                                                                                                              • Basics
                                                                                                                                • Interpolation and thresholds
                                                                                                                                  • Mathematical functions
                                                                                                                                    • Bit operations
                                                                                                                                      • Text, String and Byte array
                                                                                                                                        • Sorting
                                                                                                                                          • Date and time
                                                                                                                                            • Data type conversions
                                                                                                                                              • Parsing functions
                                                                                                                                                • Packet parser
                                                                                                                                                • factory-reset Backup & Reset
                                                                                                                                                  • access-control Access Control
                                                                                                                                                    • schemas Schemas
                                                                                                                                                      • exports Exports
                                                                                                                                                        • energy-manager Energy Manager
                                                                                                                                                          • release-notes Release Notes
                                                                                                                                                            • 2026.1
                                                                                                                                                              • 2025.2
                                                                                                                                                                • 2025.1
                                                                                                                                                                  • 2024.2
                                                                                                                                                                    • 2024.1
                                                                                                                                                                      • 2023.2 Archív
                                                                                                                                                                        • 2023.1 Archív
                                                                                                                                                                          • 2022.2 Archív
                                                                                                                                                                            • 2022.1 Archív
                                                                                                                                                                              • 2021.3 Archív
                                                                                                                                                                                • 2021.2 Archív
                                                                                                                                                                                  • 2021.1 Archív
                                                                                                                                                                                  • wiring Wiring
                                                                                                                                                                                    • Serial Bus
                                                                                                                                                                                      • Bus Extender
                                                                                                                                                                                        • Optical Isolation
                                                                                                                                                                                          • Surge Protection
                                                                                                                                                                                            • PWM Converter
                                                                                                                                                                                              • Modbus RTU
                                                                                                                                                                                                • CT clamp (0-10V)
                                                                                                                                                                                                • applications Applications
                                                                                                                                                                                                  • Settings
                                                                                                                                                                                                    • App Settings
                                                                                                                                                                                                      • Keyboard shortcuts
                                                                                                                                                                                                        • Drag & Drop
                                                                                                                                                                                                          • Windows 7, 8
                                                                                                                                                                                                            • Kiosk Mode
                                                                                                                                                                                                              • Siri & Widgets
                                                                                                                                                                                                                • Push notifications and Doorbell
                                                                                                                                                                                                                • initial-setup Initial Setup
                                                                                                                                                                                                                  • Requirements
                                                                                                                                                                                                                    • First steps
                                                                                                                                                                                                                      • LED indicators
                                                                                                                                                                                                                        • Bus Analyzer
                                                                                                                                                                                                                        • functional-areas Functional areas
                                                                                                                                                                                                                          • Heating / Cooling
                                                                                                                                                                                                                            • Modes
                                                                                                                                                                                                                            • Equithermic
                                                                                                                                                                                                                            • Circulation Pump
                                                                                                                                                                                                                            • Boiler Cascade
                                                                                                                                                                                                                            • PID Cascade
                                                                                                                                                                                                                          • Irrigation
                                                                                                                                                                                                                            • Rainfall measurement
                                                                                                                                                                                                                          • Blinds
                                                                                                                                                                                                                            • Calibration Wizard
                                                                                                                                                                                                                            • Azimuth
                                                                                                                                                                                                                            • DC Blinds
                                                                                                                                                                                                                          • Lighting
                                                                                                                                                                                                                            • PWM Dimming
                                                                                                                                                                                                                            • Dimming
                                                                                                                                                                                                                          • Alarm
                                                                                                                                                                                                                          • configuration Configuration
                                                                                                                                                                                                                            • Dashboards and Zones
                                                                                                                                                                                                                              • Bulk Edit
                                                                                                                                                                                                                                • Custom Icons
                                                                                                                                                                                                                                  • Users
                                                                                                                                                                                                                                    • Device log
                                                                                                                                                                                                                                      • Statistic Values
                                                                                                                                                                                                                                        • Make.com
                                                                                                                                                                                                                                          • Button Speed
                                                                                                                                                                                                                                            • Conversions
                                                                                                                                                                                                                                              • Date Periods
                                                                                                                                                                                                                                                • Actions
                                                                                                                                                                                                                                                  • iPad Power
                                                                                                                                                                                                                                                    • Multiple Cores
                                                                                                                                                                                                                                                      • Network architecture
                                                                                                                                                                                                                                                        • Hysteresis Equation
                                                                                                                                                                                                                                                          • Export descriptions
                                                                                                                                                                                                                                                            • Impulse meter
                                                                                                                                                                                                                                                            • applications Smart Rules
                                                                                                                                                                                                                                                              • Default Values and Manual Override
                                                                                                                                                                                                                                                                • Scheduler
                                                                                                                                                                                                                                                                  • Delay
                                                                                                                                                                                                                                                                    • Energy Manager
                                                                                                                                                                                                                                                                      • Blinds Adjustment According to Sun
                                                                                                                                                                                                                                                                        • Light Controller
                                                                                                                                                                                                                                                                          • Protect Blinds from Wind
                                                                                                                                                                                                                                                                            • Condition
                                                                                                                                                                                                                                                                              • Presence Simulation
                                                                                                                                                                                                                                                                                • Push Button Blind Control
                                                                                                                                                                                                                                                                                  • Light Scene
                                                                                                                                                                                                                                                                                    • Window Open Notification
                                                                                                                                                                                                                                                                                      • Limiting Condition
                                                                                                                                                                                                                                                                                        • Triggers
                                                                                                                                                                                                                                                                                        • integration Hardware Integration
                                                                                                                                                                                                                                                                                          • Packet Parser
                                                                                                                                                                                                                                                                                            • Automatic
                                                                                                                                                                                                                                                                                            • Manual
                                                                                                                                                                                                                                                                                            • MQTT
                                                                                                                                                                                                                                                                                          • Modbus
                                                                                                                                                                                                                                                                                            • Simple
                                                                                                                                                                                                                                                                                            • Multiple Meters
                                                                                                                                                                                                                                                                                          • Air Conditioning
                                                                                                                                                                                                                                                                                            • KNX
                                                                                                                                                                                                                                                                                              • KNX devices
                                                                                                                                                                                                                                                                                              • Configuring
                                                                                                                                                                                                                                                                                            • DALI
                                                                                                                                                                                                                                                                                              • SIP Video Doorbell
                                                                                                                                                                                                                                                                                                • 2N
                                                                                                                                                                                                                                                                                                • Configuration
                                                                                                                                                                                                                                                                                                • Akuvox
                                                                                                                                                                                                                                                                                                • DoorBird
                                                                                                                                                                                                                                                                                              • Velux
                                                                                                                                                                                                                                                                                                • DMX
                                                                                                                                                                                                                                                                                                • expose-devices Expose Devices
                                                                                                                                                                                                                                                                                                  • Alexa
                                                                                                                                                                                                                                                                                                    • TapHome API
                                                                                                                                                                                                                                                                                                      • Home Assistant
                                                                                                                                                                                                                                                                                                        • Modbus
                                                                                                                                                                                                                                                                                                          • Integration
                                                                                                                                                                                                                                                                                                            • KNX
                                                                                                                                                                                                                                                                                                            • script-language Script Language
                                                                                                                                                                                                                                                                                                              • Basics
                                                                                                                                                                                                                                                                                                                • Interpolation and thresholds
                                                                                                                                                                                                                                                                                                                  • Mathematical functions
                                                                                                                                                                                                                                                                                                                    • Bit operations
                                                                                                                                                                                                                                                                                                                      • Text, String and Byte array
                                                                                                                                                                                                                                                                                                                        • Sorting
                                                                                                                                                                                                                                                                                                                          • Date and time
                                                                                                                                                                                                                                                                                                                            • Data type conversions
                                                                                                                                                                                                                                                                                                                              • Parsing functions
                                                                                                                                                                                                                                                                                                                                • Packet parser
                                                                                                                                                                                                                                                                                                                                • factory-reset Backup & Reset
                                                                                                                                                                                                                                                                                                                                  • access-control Access Control
                                                                                                                                                                                                                                                                                                                                    • schemas Schemas
                                                                                                                                                                                                                                                                                                                                      • exports Exports
                                                                                                                                                                                                                                                                                                                                        • energy-manager Energy Manager
                                                                                                                                                                                                                                                                                                                                          • release-notes Release Notes
                                                                                                                                                                                                                                                                                                                                            • 2026.1
                                                                                                                                                                                                                                                                                                                                              • 2025.2
                                                                                                                                                                                                                                                                                                                                                • 2025.1
                                                                                                                                                                                                                                                                                                                                                  • 2024.2
                                                                                                                                                                                                                                                                                                                                                    • 2024.1
                                                                                                                                                                                                                                                                                                                                                      • 2023.2 Archív
                                                                                                                                                                                                                                                                                                                                                        • 2023.1 Archív
                                                                                                                                                                                                                                                                                                                                                          • 2022.2 Archív
                                                                                                                                                                                                                                                                                                                                                            • 2022.1 Archív
                                                                                                                                                                                                                                                                                                                                                              • 2021.3 Archív
                                                                                                                                                                                                                                                                                                                                                                • 2021.2 Archív
                                                                                                                                                                                                                                                                                                                                                                  • 2021.1 Archív

                                                                                                                                                                                                                                                                                                                                                                  Wiring

                                                                                                                                                                                                                                                                                                                                                                  Serial Bus Topology

                                                                                                                                                                                                                                                                                                                                                                  Method of connecting components in different types of buses - linear, tree, star, and ring topology. Recommendations for the correct connection of TapHome modules.

                                                                                                                                                                                                                                                                                                                                                                  Bus Extender — Wiring and Bus Termination

                                                                                                                                                                                                                                                                                                                                                                  Bus 1–4 ports on the Bus Extender, when to use a galvanically isolated port, where the 100 Ω termination resistor goes depending on the topology, and four wiring diagrams.

                                                                                                                                                                                                                                                                                                                                                                  Optical Bus Isolation

                                                                                                                                                                                                                                                                                                                                                                  Galvanic separation of RS-485 and Modbus buses with a bidirectional optical isolator. Basic ESD protection on the SLAVE side; the SLAVE side needs its own power supply.

                                                                                                                                                                                                                                                                                                                                                                  Surge Protection

                                                                                                                                                                                                                                                                                                                                                                  Essential surge protection for RS-485 and Modbus buses in exterior areas. Includes protection for power supplies and current loops. Prevents voltage damage with multi-stage circuits.

                                                                                                                                                                                                                                                                                                                                                                  PWM converter for a 0–10 V output signal

                                                                                                                                                                                                                                                                                                                                                                  PWM-to-0–10 V signal converter for centralized lighting control in larger spaces and industrial facilities. Powered from the same 24 V DC power supply as the TapHome modules, with simple calibration.

                                                                                                                                                                                                                                                                                                                                                                  Modbus RTU Wiring Examples

                                                                                                                                                                                                                                                                                                                                                                  Rules and examples for connecting devices to the Modbus RTU line with TapHome control system. Information about wiring, addressing, and communication parameters.

                                                                                                                                                                                                                                                                                                                                                                  CT Clamp — Current Measurement via Analog Input

                                                                                                                                                                                                                                                                                                                                                                  How to connect a CT clamp (current transformer) with 0-10V output to TapHome universal input for continuous current measurement.

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