Input / Output modules for daisy-chain topology Default sortingSort by popularitySort by latestSort by price: low to highSort by price: high to low 2 NTC Bus Module It reads data from temperature, humidity and CO2 sensors. 6 UI / 6 OC Bus Module It reads data from temperature sensors, switches and motion sensors.Updated 2 NTC / DI / DO Bus Module Controls blinds and lights on a daisy-chain electric installation.