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CJ1W-SCU22

Omron CJ1W-SCU22 CJ Series Serial Communication Unit RS-422 RS-485

SKU: CJ1W-SCU22

Single-port RS-422 RS-485 serial communication module for CJ1 PLC

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Product Overview

The Omron CJ1W-SCU22 is a serial communication module for CJ1 series PLCs, providing reliable RS-422 or RS-485 connectivity for industrial automation systems. This module supports RS-422 and RS-485 standards, enabling connection to multiple devices in multi-drop network configurations. The RS-485 port supports up to 32 devices, making it ideal for networked applications requiring multiple nodes. The CJ1W-SCU22 supports multiple protocols including Omron-specific protocols, Modbus RTU for third-party device integration, and general ASCII communication. The module includes buffer memory for handling data exchange without impacting PLC scan time, ensuring reliable communication. Configuration is easily achieved through CX-Programmer or the module front panel switches. The CJ1W-SCU22 is hot-swappable, allowing module replacement without powering down the PLC system. LED status indicators provide monitoring of communication activity and error conditions. Applications include connection to multiple VFDs, networked sensor systems, legacy device interface, and any application requiring multi-drop serial connectivity.

  • SKU: CJ1W-SCU22
  • Series: CJ1

Best-Fit Applications

  • Multiple VFD networks
  • Sensor network connectivity
  • Legacy equipment interface
  • Process automation
  • Multi-drop serial networks
  • Building automation
  • Remote I/O communication
  • Industrial networking

Buying Checklist

  • Multi-drop network capability
  • Modbus support for third-party
  • Hot-swappable for maintenance
  • LED diagnostics
  • Compact design
  • Proven CJ1 compatibility
  • Easy configuration
  • Omron quality

Technical Specifications

Model CJ1W-SCU22
Series CJ1
Ports 1x RS-422/485
Baud Rate 300 to 115200 bps
Data Bits 7 or 8
Stop Bits 1 or 2
Parity None, Even, Odd
Protocols Omron, Modbus RTU, ASCII
Max Nodes 32
Communication CJ1 backplane
Current Consumption 180mA at 5VDC
Weight Approx. 120g

FAQ for CJ1W-SCU22

How many devices can CJ1W-SCU22 connect to?
The RS-485 port supports up to 32 devices in a multi-drop configuration.
Does CJ1W-SCU22 support Modbus RTU?
Yes, the module supports Modbus RTU as both master and slave.
What is the difference between RS-422 and RS-485?
RS-422 is point-to-point, while RS-485 supports multi-drop networks. This module supports both.

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