





USR-IO4040 - 4 DI + 4 DO Extension - PUSR
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USR-IO4040 - 4 DI + 4 DO Extension - PUSR
Industrial I/O Extension 4 DI + 4 DO for PUSR Gateways
The PUSR USR-IO4040 is a mixed I/O extension for compatible PUSR gateways and controllers. It adds both digital inputs and relay outputs to USR-M100, USR-M300, and USR-EG628 solutions.
4 DI + 4 DO Extension
This version features 4 digital DI inputs and 4 digital DO relay outputs. It allows for reading field states while controlling equipment from a single extension.
Communication and Integration
Communication is established via RS485 using the Modbus RTU protocol. The module integrates into PUSR architectures with I/O extensions or into a classic Modbus RTU installation.
Industrial Design
The USR-IO4040 operates on 12-24 VDC, with a temperature range of -25 °C to +75 °C. Mounting can be done on a DIN rail or panel.
Applications
It is suitable for automation cabinets, small remote management installations, local control, and applications requiring both state reading and relay control.
Highlights
- Compatible with USR-M100, USR-M300, and USR-EG628
- 4 digital DI inputs
- 4 digital DO relay outputs
- RS485 Modbus RTU communication
- 12-24 VDC power supply











