IO-4RO ( 4 relay outputs )
4 relay outputs


4 relay outputs

These modules are used with HMI, PLC or SCADA via Modbus RTU protocol. IO Studio is its PC software for setting communication. Data Acquisition Studio is its PC software for DAQ purpose.

As a professional and experienced manufacturer, we supply high-performance and quality data acquisition modules, which are also called distributed IO modules, IO modules, data acquisition cards, data loggers, and IO cards.


  • Portable
  • Modbus connectivity
  • Simple setup and easy handing
  • Upto 128 Module on RS485 network
  • Isolated modules avalible for special applications
  • Low-cost IO modules addition to existing PLC system
  • Standard software for module configuration and trouble shooting
  • Date acquisiton software for data storage and Real-time analysis on PC
  • IO modules used with the third party softwares via Modbus RTU Protocol
  • Interface with field devices to provide real-time data for SCADA / PLC / HMI
  • LEDs on every modules for digital IO status, communication and power supply
  • Different types of IO Modules AI, AO, DI, DO, RTD, Thermocouples are available
  • Direct reading of temperature without scaling by using RTD and Themocouple Modules


Digital Inputs N.A
No.of Counters N.A
Isolation (Field&Logic) N.A
Status Indication N.A
Power supply"24 V DC"

Common specifications  
Counter Resolution 32 Bit
Counter frequency 1 KHz
Pulse width Min 500 Micro sec
Counter Mode UP/Down
Digital input 0 level 0-6.5 V
Digital input 1 level +12 to +24 V DC
Input Impedance 2200 ohms
Input filter Max 6553 msec.

Digital Outputs 4
Type of Digital output Relay, Form C
Maximum load current 0.5A / 1 A each ch.
Maximum load Voltage 220 V AC/ 28 V DC
Isolation (Field&Logic) 1000 V RMS
Status Indication LED for each channel

Watch dog timer Available
Watch dog time 1-255 sec, adjustable


Brochure LFIOA ( 1.94MB / 6 pages )
User Manual UMIOG (1.56 MB / 79pages )
Commnication settings software IOStudioV2.8