Digital input expansion module, with Modbus RTU output, 1 module MAX-MR-DI-4HI

Digital Input Expansion Module with MODBUS RTU Interface

This expansion module, catalog number MAX-MR-DI-4HI, is an indispensable element in automation and control systems. It serves to increase the number of digital inputs in PLCs or other devices utilizing MODBUS RTU communication. Compact dimensions (18 mm width, 90 mm height and 65 mm depth) allow for easy integration with existing infrastructure.

Versatility and functionality

The MR-DI-4HI module offers four independent digital inputs, accepting both AC and DC signals. This makes it compatible with various types of sensors and devices. The ability to configure input activation with a high or low signal, as well as circuit closure or opening, provides flexibility in adapting to specific application requirements. A built-in time filter minimizes the impact of interference on readings, ensuring stable and reliable system operation.

Communication and mounting

Communication with the module is via a standard RS-485 interface and the MODBUS RTU protocol. This makes integration with existing systems simple and intuitive. Mounting on a 35 mm rail is quick and convenient, and screw connections (2.5 mm²) guarantee secure and durable electrical connections. The module is powered by a DC voltage in the range of 9-30V.

For installers:

• The module allows easy expansion of existing systems without the need to replace the PLC controller.
• Configuration of communication and data exchange parameters is done remotely via the RS-485 port using the MODBUS RTU protocol – saving time during system startup.
• The MB Config tool available facilitates testing and configuration of the module before installation.
• Solid construction and screw connections ensure reliable operation even in harsh industrial conditions.

For end users:

• Increased number of digital inputs allows connection of more sensors and devices to the automation system.
• Time filter eliminates false alarms caused by interference, ensuring stable system operation.
• The module is easy to install and configure, which translates to low system maintenance costs.
• Compatibility with the MODBUS RTU protocol ensures integration with a wide range of PLCs available on the market.