TRP-C37A RS232/422/485 Serial Device Server with Remote Monitoring


In addition to serial server function, The TRP-C37A is able to remote monitoring serial device.

There are 2 models to choose from:

Automatic monitoring mode:

The Serial device must be sends a single pulse to TRP-C37A continually per 30 seconds.

  If serial device do not send a single pulse over 30 seconds ,the TRP-C37A  will be actives  the relay.

Manual mode:

If the serial device need  to restart, user can feel free to set the relay enable through the TRP-C37 A web configuration.


  • Automatic remote monitoring serial device.

  • Automatic restart the serial device.

  • Direct active the  relay by web based utility.

  • Read the counter value and DI status from web based utility.

  • Adjustable relay latch time from web page.

  • Wide input range DC power supply.

  • Power Input detection circuit.

  • External watchdog function prevents system or power fail. 

  • Support Auto-MDIX twisted pair crossover detection and Auto-Correction.

  • Maximum Connection 16 Client PC at Server Mode.

  • 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 form1200~921600Kbps.

  • Auto switching RS-232/422/485 signal interface.

  • Virtual COM drivers for Windows 98/WIN2000/WIN XP/Vista/WIN2003/WIN 7/WIN 8/WIN 8.1 and WIN10.

  • Virtual Com Support Server, Client, UDP mode.

  • Fully compatible with Ethernet and TCP/IP protocol.

  • Supports 10/100 Mbps Ethernet.

  • Power/Link/RX/TX mode LED indicator.

  • Heart Beat function ensures a reliable communicating connection.

  • Auto Pair-mode when power or Ethernet fails.

  • Back to factory 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.

  • RS-232: TX, RX, RTS, CTS, DTR, DSR, DCD, GND.

  • RS485 signal: differential 2 half-duplex wires (DATA+, DATA-).

  • RS422 signal: differential 4 full-duplex wires(TX+,RX+,TX-,RX-).

  • Data Rate: 1200,2400,4800,9600,19200,38400,57600,115200,921600 K bps .

  • Parity: none, even, odd.

  • Data Bits: 5, 6, 7 or 8.

  • Stop Bits: 1, 1.5 or 2.

  • Protocol: TCP, IP, ARP, DHCP, Telnet, HTTP, UDP, ICMP

  • External switch 1,2:OFF/OFF :TCP and VSP mode.

                                 ON/ OFF  : Option .

                                  OFF/ON   :Option.

                                  ON/ON     :Back to Factory.

  • Virtual-Com       RS232 TXD,RXD,GND.

                                      RS422 TX+,TX-,RX+,RX-.

                                      RS485 DATA+,DATA-.

  • Heartbeat function: TCP 5300 port send a strings per 5 seconds.

  • Maximum TCP connections at the same time: 16.

  • Digital I / O connector: D-type 9PIN female.

  • Digital input an effective voltage: DC +/- 4 ~ 30V.

  • Digital Input count : 0~65535.

  • Relay setting start to closing time: 1 ~ 255 (ms / unit).

  • Relay specifications: two independent NC, COM, NO.

  • Relay contact capacity: AC 125V / 0.5A, DC 30V / 2A, DC110V / 0.3A.

  • Power supply: Screw terminal or DC jack .

  • Serial interface: +/-15 KV ESD.

  • RS422/485 interface: Surge, over current, over voltage protection.

  • Power consumption: 12V/150mA.

  • Operating Temperature:-10 to 65 °C.

  • Humidity: 0~90% Non-Condensing.

  • Dimensions: 151(L)*75(W)*26(H) mm.

  • Weight: 410g 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