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Isolated 16 CH. digital output (Open Collector) RS485 Module


  • Wide input range DC power supply..
  • Support ASCII and Modbus RTU protocol.
  • Supports baud rates from 1.2Kbps to 115.2 Kbps.
  • Digital output signal with 3750Vrms isolation protection.
  • Dual watchdog: Module’s firmware, host computer traffic.
  • LED for each channels working status.
  • DIN-Rail and panel mount support.
  • Configured and self-test by external dip-switch.
  • Support screw terminal and external DC power adaptor.


  • Power Input Voltage DC +10V to +30V.
  • Protocol: ASCII and Modbus RTU.
  • Digital output maximum voltage:+30V.
  • Digital output maximum current: 100mA.
  • Digital output isolation: 3750Vrms.
  • Communication interface: RS-485 differential 2 half/duplex wires.
  • Communication speed form 1.2Kbps to 115.2Kbps auto-switching.
  • Data format: Data bit: 8, Parity Check: None, Stop Bit: 1.
  • Distance: up to 4000ft ( 1200M ).
  • Connection type: Screw terminal for maximum AWG 12 wire.
  • Signal LED: Power, and all output channels.
  • Power supply: Screw terminal, or external DC adapter.
  • Power consumption 1.5W.
  • Operating environment: 0 to 50℃.
  • Storage temperature:. -20 to 70℃.
  • Humidity: 10~90% Non-condensing.
  • Dimension: 151mm X 75mm X 26mm .
  • Weight: 395g .


The TRP-C24, an isolated output open collector RS-485 module, provides 16 digital outputs channels that allow you output open collector signal (100mA) to driven your devices on RS-485 network. All channels feature screw terminals for convenient connection of field signals as well as LED?s to indicate channel working status. All outputs are equipped with photo-couplers to protect the module against high voltage spikes, as well as ground potential differences. For easy user access, TRP-C24 can enter configuration mode and self-test mode with outer dip-switch. TRP-C24 support both ASCII and Modbus protocol, with?a full set of command, dual watch-dog, and auto reset function the module?can be remote controlled by PC in ASCII or Modbus RTU protocol.