Omron CJ1W-SCU41-V1 Series Serial Communication Unit

The Omron CJ1W-SCU41-V1 series offers highly versatile serial communication units for CJ-series PLCs, enabling dual-port RS-232C and RS-422A/485 connectivity with rich protocol support. Ideal for integrating barcode scanners, drives, HMIs, and weighing systems, these units feature Protocol Macro, Modbus-RTU, Host Link, Serial Gateway, and No-Protocol modes to accommodate legacy and open-architecture communication.

With support for up to 2 serial ports, configurable communication parameters, and the ability to queue and execute complex macros directly from ladder logic, the SCU series bridges the gap between Omron PLCs and third-party serial devices in advanced automation systems.

Technical Specifications

Model Numbers: Omron SCU41-V1
Series: CJ1W
Product Type: Serial Communication Unit
Mounting Type: DIN rail via CJ-series rack
Dimensions (W × H × D): Varies by model (typical: 31 × 90 × 65 mm)
Weight (Unpacked): 160 g
Unit Type: CPU Bus Unit
Max Units per Rack: Up to 16 CPU Bus Units
Power Consumption: 280–400 mA @ 5 VDC + 0.15 A per NT-AL001 link adapter (if used)

Serial Interface Specifications

• Ports per Unit: 2 (combinations of RS-232C / RS-422A/485)
• Baud Rates: 1,200 to 230,400 bps (model-dependent)
• Max Cable Length:
  • RS-232C: 15 m
  • RS-422A/485: Up to 1,200 m (multidrop or point-to-point)
• Communication Modes: Full-duplex / Half-duplex (selectable)
• Frame Formats: Configurable (start code, end code, CR+LF, etc.)
• Error Checking: Parity (even, odd, none), LRC, CRC-16, SUM, FCS

Supported Protocols

• Host Link Protocol (C-mode & FINS): For master-slave and peer-to-peer communication
• Protocol Macro: Ladder-controlled protocol scripting using PMCR(260) instruction
• Serial Gateway: Converts FINS commands into CompoWay/F, Modbus-RTU, or Modbus-ASCII
• Modbus-RTU Slave: Standard 8-function support (Function Codes 01–10h)
• No-Protocol Mode: Raw ASCII or binary data transfer with RXDU/TXDU instructions
• NT Link (1:N): HMI integration

Protocol Macro Functionality

• Max Protocols: 20
• Sequences per Protocol: 60
• Max Steps per Sequence: 16
• Data Exchange Words:
  • Operand setting: 250 words
  • Link word: 500 words
  • Direct setting: 500 words
• Macro Triggers: PMCR(260) instruction from ladder logic
• Send/Receive Messages: Up to 1,000 bytes
• Trace Function: Up to 1,700 bytes traceable (step transitions, RS/CS states)

Application Capabilities

• Send/Receive Control: Supports X-on/X-off, RS/CS, modem control
• Reception Matrix: Up to 15 defined message cases + 1 default
• Retry & Wait Controls:
  • Retry count: 0–9
  • Wait time: 0.01s to 99 mins
• Flexible Message Handling: Wildcards, data type conversion, and structured responses

CJ1W-SCU41-V1 Key Features & Benefits

✅ Dual Serial Ports: Multiple device support with RS-232C and RS-485 options.

✅ Wide Protocol Support: From FINS and Host Link to Modbus and ASCII macros.

✅ Powerful Protocol Macro Engine: Full control over serial message exchange.

✅ No-Protocol Mode: Direct, flexible ASCII/Binary handling.

✅ Scalable Integration: Up to 16 SCUs in one system, across multiple slots.

📦 Available from Drive Outlet Megastore

The Omron CJ1W-SCU41-V1 series is the ultimate solution for integrating serial field devices into your CJ-series PLC architecture with full control and flexibility.

Need help designing or debugging your serial communication logic?
Talk to our Omron integration experts today.

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