Intelligent Input/Output and Sensor device equipped with four digital inputs and four digital outputs with separate commons.
The digital inputs are opto-isolated and include a programmable debounce filter. They are designed for pulse counting from external sources or for remote status indication.
The digital outputs are opto-isolated transistor type, rated 27 VDC / 27 mA according to DIN 43864, and can be configured as outputs for internal alarms or as remotely controlled units via serial line using Modbus commands.
Up to eight alarms can be configured to drive digital outputs and/or generate status signals on Modbus registers.

The device is equipped with a power LED, a status LED, and an RS485 communication LED.
Communication protocol: Modbus-RTU RS485.
Firmware remotely upgradeable.
DIN rail mounting, 4-module size.
Power supply: 230–240 VAC.