The ISMA-B-4I4O-H is a multi-protocol I/O module tailored for building automation, supporting BACnet MS/TP and Modbus RTU/ASCII protocols. Its compact design fits easily in tight spaces, making it suitable for various applications. This module features built-in light applications for output control based on input measurements.

It offers four digital inputs for monitoring dry contacts and includes a fast pulse counter that operates at 100 Hz. This function saves real-time values directly to EEPROM memory, which maintains data integrity. The four digital outputs use normally open 3 A relays for direct equipment control.

Each output has a manual override switch for added flexibility. Configuration and commissioning are straightforward due to compatibility with BACnet, Modbus, and a dedicated free configuration tool. Powering the module via USB allows for local testing and easy updates. An RS485 transceiver connects up to 128 devices, ensuring reliable communication across your network.