TRP-C37M  Modbus TCP To RTU/ASCII Gateway


The TRP-C37M which is able to analyzes the protocols between Modbus TCP and Modbus RTU / ASCII. It able to assign the UID of Modbus TCP slave from Modbus Serial Master.

The TRP-C37M which is suitable industrial environment Ethernet serial server, wide range power input and serial communicate protection, It Built-in surge, over current, over voltage ensure RS422 / 485 serial communication quality; if user lost password that can fast back to default by external switch.

The TRP-C37M can as serial server that support 3 operates mode, “Direct IP Mode”, “Virtual COM Mode”, and “Paired Mode”, these modes are supported Modbus RTU / ASCII protocols.

The TRP-C37M offers maximum connection 16 host clients to link the one serial server, it is easy to operate in Modscan32 and Modbus Poll many application uses Virtual-COM mode and Pair Mode.

The TRP-C37M provides a watchdog timer function, The Watchdog timer allows the system to automatically recover from a system crash. When the TRP-C37M MCU stop working correctly, the watchdog timer waits for a preset period of time, and performs a hardware reset .

When The TRP-C37M working at unstable voltage industrial environment, the power detection circuit can prevent the power fail cause of the boot fail then auto re-boot.

The TRP-C37M will be auto detects function which will be auto connect when the LAN disconnect then re-connect or power off then power on.

In network security, the TRP-C37 is able to set up 8 sets host IP, only these host IP can access the TRP-C37.


  • Wide input range DC power supply.
  • Built-In watchdog function prevents system boot fail. 
  • Support Auto-MDIX twisted pair crossover detection and Auto-Correction.
  • Modbus Type support TCP Master to Serial Slave and TCP Slave to Serial Master.
  • Support 1 serial master  to 8 TCP slave ,each TCP slave can free set up UID from 0~256.. 
  • Compatible with    Modscan32 ,Modbus Poll,CAS Modbus Scanner and SCADA .. application.
  • Support virtual com maximum connection 16 client.
  • Maximum 8 sets host IP that limits network access.
  • Surge protection and over current and over voltage on RS-422/485 data lines.
  • Support baud rate from1200~921600Kbps.
  • Auto switching RS-232/422/485 signal interface.
  • Fully compatible with Ethernet and TCP/IP protocol.
  • Supports 10/100 Mbps Ethernet.
  • Power/Link/UART RX/UART TX mode LED indicator.
  • Heart Beat function ensures a reliable communicating connection.
  • Auto reconnection when power or Ethernet fail.
  • Back to factory configuration by external switch.
  • Support configuration by serial console.
  • Update the firmware from LAN.
  • Dual power input select from screw terminal or DC-Jack.


  • Power Input Voltage: DC +10V to +30V.
  • LAN: Auto-MDIX, 10/100 Mbps Auto-detecting.
  • Modbus TCP Type: TCP Master and slave.
  • Virtual COM drivers for Windows 98/WIN2000/WIN XP/Vista/WIN2003/WIN 7/WIN 8/WIN 8.1 and WIN10.
  • External touch button: Back to factory.     .
  • Power supply: Screw terminal, or DC jack.
  • Configuration mode: Trycom Device Manager, WEB settings.
  • Plug-in screw terminal wiring: Accepts AWG #12 ~30 wires.
  • Power consumption: 12V/140mA.
  • Operating Temperature: -10 to 65 °C.
  • Humidity: 0~90% Non-Condensing.
  • Dimensions: 151(L)*75(W)*26(H) mm.
  • Weight: 395g with packing.



1.8M D-SUB 9 pin female to female Null-Modem cable

Switching Adaptor

Input:100~240VAC 50/60Hz 260mA

Output: DC 12V/1A

PWR-AD12VAuto (Option)

Certificate: CE, FCC, UL, PSE

US Specification

We also provide the EU / AUS / British specifications(MOQ:50PCS/2 Weeks)……more

DIN-RAIL-R (Option)

DIN rail mounting adapter