Omron CJ1W-SCU42 Serial Communication Unit

The Omron CJ1W-SCU42 is a high-speed serial communication unit designed for CJ-series modular PLC systems. Equipped with 1 x RS-232C and 1 x RS-422/485 port, it enables multi-protocol serial interfacing for external devices including HMIs, sensors, bar code readers, and intelligent instruments.

The unit supports MODBUS-RTU (Master/Slave), Host Link, 1:N NT Link, and Serial Gateway modes, making it a powerful communication gateway for field integration. With a max baud rate of 230 kbps, it is suitable for high-speed serial data exchange across diverse automation platforms.

Technical Specifications

Model: CJ1W-SCU42
Series: CJ1 Modular PLC
Module Type: CPU Bus Unit
Function: Serial Communication
Communication Ports: 2 (1 x RS-232C, 1 x RS-422/485)
I/O Bus System: CJ CPU Bus
Max. Baud Rate: 230 kbps
Supported Modes: Protocol Macro, No Protocol, Host Link, NT Link 1:N, MODBUS RTU/ASCII, Serial Gateway
Network Protocols: CompoWay/F, MODBUS RTU Master/Slave, Host Link

Electrical Specifications

• Power Supply: Supplied via CJ-series backplane
• Current Consumption: Approx. 0.35 A
• Isolation: Optical and transformer isolation between ports and internal logic
• Baud Rate Range: 300 bps to 230.4 kbps
• Error Detection: Parity, framing, and communication timeouts

Communication Interfaces

• Serial Port 1: RS-232C (DB9 Male)
• Serial Port 2: RS-422/485 (Removable terminal block)
• Protocol Support: Protocol Macro, No Protocol, Serial Gateway, MODBUS RTU/ASCII
• Configuration Software: CX-Protocol or Sysmac Studio (via PLC CPU)
• Max. Connected Devices: Varies by protocol – typically up to 32 on RS-485

Mechanical Specifications

• Mounting: DIN rail
• Unit Dimensions (H × W × D): 90 × 31 × 81.9 mm
• Weight: 190 g
• Cooling: Natural convection
• Connector Type: DB9 and screw terminal block

Environmental Specifications

• Operating Temperature: 0 to 55°C
• Storage Temperature: –20 to 75°C
• Operating Humidity: 10% to 90% RH (non-condensing)
• Vibration Resistance: 5 to 8.4 Hz, 3.5 mm amplitude; 8.4 to 150 Hz, 9.8 m/s²
• Shock Resistance: 147 m/s², 3 times each in 6 directions
• IP Rating: IP20 (when installed in enclosure)

Compliance & Certifications

• CE Marked: Yes
• RoHS Compliant: Yes
• UL / cUL Listed: Yes
• Standards: EN61131-2, EN61010-2-201

Key Features & Benefits

✅ Dual Serial Ports. Supports both RS-232C and RS-422/485 for maximum flexibility.

✅ Multi-Protocol Ready. Handles MODBUS RTU, Host Link, NT Link, Serial Gateway, and more.

✅ 230 kbps High-Speed Communication. Enables responsive, time-critical data exchange.

✅ Easy Configuration. Compatible with CX-Protocol and Omron’s PLC programming environment.

✅ Compact Rack Integration. Slim 31 mm width fits seamlessly into CJ-series PLC setups.

📦 Order the Omron CJ1W-SCU42 from Drive Outlet Megastore

The CJ1W-SCU42 delivers the serial connectivity needed for modern machine communication, whether you’re linking PLCs to barcode readers, HMIs, or custom equipment. Compact, configurable, and protocol-rich — it’s your gateway to advanced automation.

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Serial integration made simple. High-speed, multi-protocol, Omron engineered. — Drive Outlet Megastore