Digital inputs expansion MR-DI-4 Lo

Digital inputs expansion MR-DI-4 Lo

MR-DI-4 Lo

With MODBUS RTU output.
The MR-DI-4 module is used as an external device that extends digital inputs of the PLC programmable controllers or other devices in which data is exchanged via the RS-485 port with MODBUS RTU protocol.

Features
* four independent outputs
* input designed to work with AC/DC signals
* state 1 trigger selection: with high or low voltage
* state 1 trigger selection: with closing or opening of the circuit input
* time filter that allows you to set the minimum acceptable length of input signal (elimination of distortions at the input)
 

Operation
The MR-DI-4 module has four inputs. The module has configurable options for activating inputs (TRUE value) with low (0V) or high (V +) signal and with closing or opening the input signal circuit. Time filter is used for eliminating interference (false pulses) which may appear at the input. This is the setting of a minimum length of time of the input signal, which will be seen at the input and will be treated as a change of state. Shorter signals are ignored.
Reading of input states and adjustment of all communication and data exchange parameters is carried out via RS-485 port using MODBUS RTU communication protocol. Power is indicated by a green LED U light. Correct data exchange between the module and other device is indicated by the LED yellow Tx light.   



      

Power supply voltage9├Ě30 V DC
Inputs - voltage tolerance6├Ě30 V AC/DC
portsRS-485
Communication protocolMODBUS RTU
Number of digital inputs4
The type of workSLAVE
Speed ??- adjustable1200├Ě115200 bit/s
Data bits8
Stop bits1 / 1.5 / 2
Bits of parityEVEN / ODD / NONE
Address1├Ě247
terminalscrew terminals 1,5 mm┬▓
Tightening torque0,4 Nm
Power consumption0,3 W
Working temperature-20├Ě50┬░C
dimensions1 module (18 mm)
Assemblyon rail 35 mm
Level of securityIP20
I/O connection scheme





Implementation of connection of counting and digital inputs

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Reset of communication settings

MODBUS RTU protocol parameters


  


  

 
   




Table of input triggering options and logical states assigned to them TRUE (1) i FALSE (0)