The MVI56-MNET module is a Modbus communication module manufactured by Allen-Bradley and Prosoft Technology. It uses the Modbus TCP/IP protocol and the ControlLogix network and it can be used with a wide variety of applications. It comes with both server and client drivers and functionalities. This general-purpose module can support connections with up to 5 mbap clients by using service port 502 and 5 MNET clients by using service port 2000. The clients on this module variant can easily send messages to more than one server. The MVI56-MNET module  is compatible with Allen-Bradley ControlLogix processors. The communication module is equipped with a single RJ 45 serial configuration port, and a single Modbus Ethernet port. The Modbus Ethernet port allows the MNET client variant to communicate with the ControlLogix processor interface easily.

The Allen-Bradley and Prosoft Technology MVI56-MNET communication module comes with a backplane current load of 800 milliamps at 5 Volts DC, and 3 milliamps at 24 Volts DC. The front of the module comes with an LED indicator for the battery status, the application status, and the module status. A display screen is present on the front side that shows the module, version, IP address, application port setting, and the error information. This display screen is a 4-character scrolling, alpha-numeric display. The MVI56-MNET module is backward compatible with all the previous versions of the MNET modules. It features a 10/100 Mbps auto crossover detection Ethernet configuration and an application port. The module comes with user-definable module data memory mapping for up to 5000 16-bit registers at a time.