TRP-C26       16-CH isolated digital input RS-485 module ,        Support ASCII and Modbus RTU protocol.


TRP-C26 provides 16 optical isolated digital input channels that allow you to input the logic signal from 0 to 30V DC. All channel features screw terminals for convenient connection of field signals as well as LED’s to indicate channel status. All inputs are equipped with photo-couplers to protect the module against high voltage spikes, as well as ground potential differences. For easy user access, TRP-C26 can enter configuration mode and self-test mode with outer dip-switch. TRP-C26 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 .


  • Wide input range DC power supply..
  • Support ASCII and Modbus RTU protocol.
  • Supports baud rates from 1.2Kbps to 115.2 Kbps.
  • All 16 channels digital input ca be used as counter.
  • 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  outer dip-switch.
  • Support screw terminal and external DC power adaptor.
  • Fully compatible with SCB-C26.


  • Power Input Voltage: DC +10V to +30V.
  • Protocol: ASCII and Modbus RTU.
  • Input channel: 16 digital input channels with counter.
  • Input digital input counter: 0~65535.
  • Input optical isolation: 3750 Vrms.
  • Input logical level 0 +1V (max).
  • Input logical level 1 +4.0V ~ +30V.
  • Communication interface: RS-485.differential 2 half.duples wires.
  • Communication speed: Baud rate from 1200bps to 115.2Kbps.
  • Data format: Data bit: 8, Parity Check: None, Stop Bit: 1 .
  • Input impedance: 3KΩ.
  • Inputs can be use as counter channel: 16.
  • Counter frequency: 100 Hz.
  • Dual watchdog Hardware reset circuit, module and host operating status.
  • Signal LED: Power on, all input channels
  • Power supply: Screw terminal, or standard external DC adapter
  • Power consumption: 1.5W (max)
  • Operating environment: -10 to 50℃.
  • Storage temperature: -20 to 70℃.
  • Humidity: 10-90% non-condensing.
  • Dimension: 151mm X 75mm X 26mm .
  • Weight: 395g .


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