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

Digital Input Expansion Module with MODBUS RTU Interface

This expansion module, catalog number MAX-MR-DI-4LO, is used to increase the number of digital inputs in control and automation systems. This is particularly useful for PLCs or other devices where additional functionality is needed to collect signals from sensors, limit switches, or other binary devices. Communication is via the MODBUS RTU standard, ensuring easy integration with existing systems.

Versatile application and easy integration

The MR-DI-4 module is designed to operate as an expansion device, allowing the connection of four independent digital inputs. This allows for flexible adaptation of the system to specific application needs. A power supply in the range of 9-30V DC and acceptance of AC/DC input voltages (6-30V) make the module compatible with various power sources and signal types. Screw connection provides solid and reliable electrical connections.

Specifications and design features

The module has compact dimensions – 18 mm wide, 90 mm high and 65 mm deep – allowing for mounting in limited space. Mounting is on a standard 35 mm rail. The MODBUS RTU transmission speed is configurable in the range of 1200-115200 bit/s, allowing for optimization of communication depending on system requirements. The module has addressability (range 1-247), allowing multiple modules to be connected to a single MODBUS RTU bus. Power consumption is only 0.3W, minimizing the load on the power supply. The IP20 protection class provides protection against touch and dust. AC 50 Hz supply voltage is 9 - 30 V.