• Converting 2wire communication signals to the protocols of
Modbus RTU for RS485 / RS422
• RMN-004 can be used together in the 9 bus rs485 system or
connect 2 wire systems to join in the RS RS-485 system with
a maximum of 9 loop.
• Showing results with LED Power Supply (Green), Run (Yellow), and
Alarm (Red)
• There is 1 Relay Alarm when there is a communication error

OPERATION
RMN-004 Interface RS-485 Module serves to connect 2 – wire signals to the Modbus RTU for RS-485 signal, allowing PC Server or PLC to control I/0 in 2 wire systems. As shown in Figure 1 shows the connection of the 2-wire system to the RS485 system.On the Master I/0 module, one set of rotary switches is located under the plastic plate. The front plate is used to set the Address. The module is used to communicate  with Modbus RTU Protocol on Bus RS485. In addition, the LED displays the status of Supply, Run, Alarm and Input/ Output status of each channel.