Model : TRP-C37M

Modbus TCP to RTU/ASCII Gateway TRP-C37M


It is the first step for traditional factories to transition to Industry 4.0.

An Ethernet serial server suitable for industrial environments, featuring a wide power input range and serial communication protection.

This product supports three operating modes: “Direct IP Mode,” “Virtual COM Mode,” and “Paired Mode” for serial servers, all of which support the Modbus RTU/ASCII protocol.


It has built-in overvoltage, overcurrent, and surge protection to ensure the quality of RS422/485 serial communication. 

If the user forgets the password, it can also be quickly restored to default settings via an external switch.


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If you have any questions, 

please feel free to contact us!

 Input Voltage
 DC +10V~ +30V
 Network  Auto-MDIX, 10/100 Mbps Auto-Detection
 Modbus TCP Mode
 TCP Master & Slave
 Virtual COM Driver Compatibility 

 Win 98, Win 2000, Win XP/Vista, Win 2003, 
 Win 7, Win 8, Win 8.1, Win 10

 External Button
 Factory Reset Button
 Power Input Method
 Wire Lock / DC Adapter
 Power Consumption:
 12V/140mA 
 Operating Temperature
 -10~65 °C
 Operating Humidity
 0~90% RH Non-Condensing
 Dimensions
 151 x 75 x 26 mm
 Weight
395g (including packaging)
  • Built-in watchdog function to prevent system startup failure.
  • Supports automatic MDIX twisted pair crossover detection and auto-correction.
  • Modbus type supports TCP master to serial slave and TCP slave to serial master.
  • Supports 1 serial master to 8 TCP slaves, each TCP slave can freely set UID from 0 to 256.
  • Compatible with Modscan32, Modbus Poll, CAS Modbus Scanner, and SCADA applications.
  • Supports virtual COM with a maximum connection of 16 clients. Up to 8 host IPs can be set to restrict network access.
  • RS-422/485 data lines have overvoltage protection, overcurrent, and surge protection.
  • Supports baud rates from 1200 to 921600Kbps.
  • Automatic switching of RS-232/422/485 signal interfaces.
  • Fully compatible with Ethernet and TCP/IP protocols.
  • Supports 10/100 Mbps Ethernet.
  • LED indicators for power/connection/UART receive/UART transmit modes.
  • Heartbeat function ensures reliable communication connection.
  • Automatically reconnects in case of power or Ethernet failure.
  • Restores factory settings via external switch.
  • Supports configuration via serial console.
  • Firmware updates from LAN.
  • Dual power inputs selectable from screw terminals or DC jack.