The Modbus module with 4 S0 inputs according to DIN EN 62053-31 Class A was developed for decentralized switching tasks. It is suitable for counting S0 counter pulses. This means that the module can be easily integrated into an energy control system. In the event of a power failure, the last counter readings are saved. The inputs can be queried via standard registers using a Modbus master. The module is addressed and the bit rate and parity are set using two address switches on the front or via software. Suitable for decentralized installation on TH35 mounting rails according to IEC 60715 in electrical distribution boards. Connection with screw terminals