Digital input expansion module with MODBUS RTU output MR-DI-4 Lo F&F

Functions

• 4 independent inputs
• input adapted to work with AC/DC signals
• selection of option to trigger state 1: high or low voltage level
• choice of option to trigger state 1: closing or opening of the input circuit
• time filter, allowing to set the minimum acceptable length of the input signal (elimination of input noise)

Operation
The MR-DI-4 expansion module has 4 inputs. It has configurable options for activating the inputs (TRUE value) with a low (0 V) or high (V+) signal and closing or opening the input signal circuit. The time filter is used to eliminate interference (false pulses) that may occur at the input. It is a setting for the minimum length of time an input signal will be seen at the input and treated as a change of state. Shorter signals are ignored.
The reading of the input status and the setting of all communication and data exchange parameters are carried out through the RS-485 port using the MODBUS RTU communication protocol. Power on is signaled by the lighting of the green U LED. Correct data exchange between the module and the other device is signaled by the illumination of the yellow LED Tx.

MB Config
The program allows test reading of values and setting communication and configuration parameters of the MR-DI-4 Lo expansion module.



Communication of the modulea with PC by means of USB converter WE-1800-BT