The Modbus module in IP65 housing with 4 digital inputs and 2 relay outputs was developed for decentralized switching tasks. Suitable for e.g. to record light switches and window contacts in one room and to switch two light bands or for use as shutter control. 2 motorized fire dampers can also be controlled. In this case, the relay contacts must be protected by suitable load-dependent measures. The inputs can be operated as contact or voltage inputs. Via a Modbus master, the inputs and outputs can be switched and queried via standard registers. The settings of the module address, the bit rate and the parity are made by two switches or software.This text is machine translated.