TRP-C34X  Ethernet to 1 RS-232 and 1 RS422/485 Optical Isolated Converter


TRP-C34X RS232/422/485 Serial Server provides a transparent way of connecting Serial devices over Ethernet. It can transmit data between the Serial and Ethernet interfaces bi-directionally. To establish automatic or remote data acquisition, TRP-C34X Serial Server also provides 3KV optical isolation and surge protection to protect system from ground loops and destructive.

 By specifying the IP address and the TCP Port number, a host computer can access different Serial Devices such as Serial Thermometers, Magnetic Card Readers, Barcode Scanners, Data Acquisition Systems, POS Terminals, Industrial PCs etc., over the Network, you can centralize Serial Device management and distribute the management to different hosts at the same time. TRP-C34X makes possible to access distant Serial Devices over Network as if they were directly connected to the Standard COM Port of a Personal Computer.

 TRP-C34X supports different modes of operation allowing user to operate the system in different environments.      

Real COM Mode

TRP-C34X comes equipped with COM drivers that work with Operating Systems WINXP /Vista/2003Server/2008 Server (32-bit & 64-bit), 2000 Server OS, Win 7 (32-bit & 64-bit),WIN8/WIN8.1(32/64bit), The driver establishes a transparent connection between host and serial device by mapping the IP: Port Number of the TRP-C34X’s Serial Port to a local COM Port on the host computer. 

 The important point is that Real COM Mode allows users to continue using RS-232/422/485 serial communications software like HyperTerminal and similar applications.  

 TCP Server Mode. 

In TCP Server mode, TRP-C34X provides a unique IP: Port address on a TCP/IP network. TRP-C34X waits passively to be contacted by the host computer, allowing the host computer to establish a connection with and get data from the serial device. This operating mode supports up to 4 simultaneous connections, so that multiple hosts can collect data from the same serial device—at the same time. 

 TCP Client Mode

In TCP Client mode, TRP-C34X can actively establish a TCP connection to a pre-defined host computer when serial data arrives. After the data has been transferred, TRP-C34X can automatically disconnect from the host computer by using the TCP alive check time or Inactivity time settings. This Operating Mode supports establishing the TCP connection up to 4 Destination Hosts.

 UDP Mode.

Compared to TCP communication, UDP is faster and more efficient. In UDP mode, you can multicast data from the serial device to multiple host computers, and the serial device can also receive data from multiple host computers, making this mode ideal for message display applications.

When TRP-C34X working at unstable voltage industrial environment, the hardware circuit detection can prevent the power fail cause of the boot fail and Re-Boot.


  • Wide input range DC power supply.

  • RS232/422/485 Built-in 3KV Optical-Isolation.

  • Surge protection and over current and over voltage on RS-422/485 data lines.

  • Supports Socket operation modes like TCP Server, TCP Client, and UDP using TCP/IP and UDP protocols.

  • Support Auto-MDIX twisted pair crossover detection and auto-correction.

  • Each Port maximum connection 4 host PC at TCP Server and TCP Client Mode.

  • Maximum allowed bandwidth is 460 Kbps per Serial Port.

  • Supports Web Console, Telnet Console.

  • Runs in Stand Alone Mode.

  • Built in Restore Factory default push button.

  • Features Accessible Imps List to add or remove “legal” remote host IP Addresses to prevent unauthorized access to TRP-C34X.

  • Features Auto IP Address Report to periodically report the IP Address of TRP-C34X to the assigned Host on Network.

  • Auto direction RS485 flow control by hardware.

  • Virtual COM drivers for WIN XP /Vista/2003Server/2008 Server (32-bit & 64-bit), 2000 Server OS, Win 7 (32-bit & 64-bit),WIN8/8.1(32 bit&64bit).

  • Fully compatible with Ethernet and TCP/IP protocol.

  • Power/Link and 2 pair Serial RX/TX mode LED indicator.

  • Support screw terminal and standard external DC power adaptor.

  • Din rail or panel mounts support.


  • CPU:32 bit 170MHZ with MMU.

  • SDRAM:32MB.

  • FLASH:8MB.

  • Power Input Voltage: DC +10V to +30V.

  • LAN: Auto-MDIX, 10/100 Mbps Auto-detecting.

  • RS-232: TXD, RXD, RTS, CTS, ISO GND.

  • RS-422: TX+, TX-, RX+, RX-, ISO GND.

  • RS-485: Data +, Data –, ISO GND.

  • Data Rate: 75~921Kbps.

  • Parity: none, even, odd.

  • Data Bits: 5, 6, 7 or 8.

  • Stop Bits: 1, 1.5 or 2.

  • Configuration through Windows Admin Utility / Web Console / Telnet Console.

  • Supports Real COM mode using RFC 2217 protocol.

  • Protocol: ICMP, TCP/IP, UDP, DHCP, Boot, Telnet, DNS, SNMP, HTTP, SMTP, SNTP.

  • Power supply: Screw terminal, or standard external DC adapter.

  • Serial interface: +/-15 KV ESD.

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

  • Power consumption: 12V/230 mA (without external device).

  • Operating Temperature: 0 to 65 °C.

  • Humidity: 0~90% Non-Condensing.

  • Dimensions: 141(L)*78(W)*26.5(H) /mm.

  • Weight: 450g (W/Packing).



PWR-AD12VAuto (Option)

Switching Adaptor

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

Output: DC 12V/1A

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