CJ1W-SCU31-V1 Serial Communication Unit for CJ1 PLC with RS-232C/422/485 Support

Comprehensive Product Overview

The Omron CJ1W-SCU31-V1 is an industrial-grade serial communication unit engineered for seamless integration into Omron's CJ1 series Programmable Logic Controller (PLC) systems. Designed for mission-critical automation environments, this high-performance module facilitates robust serial data exchange between PLCs and diverse industrial peripherals including barcode scanners, vision systems, printers, instrumentation, and sensor networks. With its dual-port architecture and advanced noise immunity technology, the CJ1W-SCU31-V1 ensures reliable high-speed communication in electrically harsh conditions while optimizing control cabinet space utilization.

Enhanced Features and Operational Benefits

• Dual-Interface Architecture: Features 1 RS-232C port (D-Sub 9-pin connector) and 1 RS-422A/485 port (terminal block) enabling simultaneous connections to legacy and modern industrial devices.
• High-Velocity Data Transfer: Supports configurable baud rates up to 115.2 kbps with 7/8-bit data length, 1/2 stop bits, and None/Even/Odd parity options for optimal throughput in time-sensitive operations.
• Industrial Durability: Compact 31 × 90 × 65 mm housing with 200g weight withstands severe conditions including vibration (10-150Hz) and shock (147 m/s²) per IEC standards.
• Advanced Noise Mitigation: Photocoupler isolation on all communication lines ensures signal integrity in high-electromagnetic-interference environments typical of motor control centers and welding facilities.
• Energy-Efficient Operation: Low 0.25A power consumption at 5V DC (±5%) reduces thermal load and supports dense backplane configurations.
• Extended Environmental Tolerance: Operational temperature range of 0°C to 55°C with 10-90% non-condensing humidity compatibility for challenging installations.
• Multi-Protocol Support: Native compatibility with Host Link, NT Link, 1:1 PLC Link, Serial Gateway, and Protocol Macro communication frameworks.
• Manufacturer Warranty: Backed by Omron's 1-year comprehensive warranty against manufacturing defects.

Targeted Industrial Implementation Scenarios

• Automated Production Systems: Enables real-time data exchange between CJ1-series PLCs and quality control instruments including vision inspection systems, digital calipers, and weigh scales via serial interfaces.
• Logistics Automation: Facilitates high-volume scanning operations through integration with barcode/RFID readers in sorting systems, AS/RS warehouses, and package handling equipment.
• Industrial Printing Solutions: Provides reliable connectivity to labeling systems, dot matrix printers, and marking equipment for production lot tracking and compliance documentation.
• Remote Monitoring Networks: Interfaces with MODBUS-compatible sensors, flow meters, and environmental monitors for distributed data acquisition in utility and process control applications.
• Building Management Systems: Connects HVAC controllers, access control panels, and energy meters to central automation systems using RS-485 multi-drop networks.
• Robotic Workcell Integration: Serves as communication gateway between PLCs and robotic controllers for coordinated assembly and material handling operations.

Precision Technical Specifications

Parameter	Detailed Specification
Manufacturer Model Number	CJ1W-SCU31-V1
Communication Port Configuration	Port 1: RS-232C (D-Sub 9-pin male), Port 2: RS-422A/485 (screw terminal block)
Maximum Transmission Speed	115,200 bps (software-configurable in 15 steps)
Data Framing Options	Data Bits: 7 or 8 / Stop Bits: 1 or 2 / Parity: None, Even, Odd
Signal Isolation	Photocoupler isolation (2,500V AC for 1 minute between all communication lines and PLC backplane)
Physical Dimensions (W×H×D)	31 mm × 90 mm × 65 mm (conforms to CJ-series module standards)
Unit Mass	200 grams (excluding cables and connectors)
Backplane Power Requirements	5 V DC ±5%, 0.25 A (supplied through CJ-series base unit)
Operating Temperature Range	0°C to 55°C (32°F to 131°F) with derating above 40°C
Storage Temperature Range	-25°C to 75°C (-13°F to 167°F)
Ambient Humidity Tolerance	10% to 90% RH (non-condensing, no icing)
Vibration Resistance	10-57 Hz: 0.075mm amplitude, 57-150 Hz: 9.8 m/s² acceleration (compliant with IEC 61131-2)
Shock Resistance	147 m/s² acceleration, 11 ms duration, 3 shocks per 6 directions (IEC 61131-2 compliant)
Communication Distance	RS-232C: 15m max, RS-422A: 500m max, RS-485: 500m max (dependent on baud rate)

System Compatibility and Integration

Designed exclusively for Omron CJ1-series PLC platforms, the CJ1W-SCU31-V1 maintains full compatibility with CJ1G/H/M and CJ2M CPU units. Occupying a single slot in CJ-series backplanes, this communication unit requires configuration via Omron's CX-Programmer software (version 9.8 or later). The module supports protocol macro functionality for custom communication sequences and includes pre-defined protocol templates for rapid deployment. Factory-default settings are optimized for standard Host Link communication with Omron HMI panels and SCADA systems.

Ordering and Compliance Information

Each CJ1W-SCU31-V1 unit ships as a complete assembly with mounting hardware and terminal labels. For optimal signal integrity, Omron recommends using shielded communication cables such as XW2Z-S001 (RS-232C) and XW2Z-500S-C (RS-422A/485). The product carries CE marking, complies with RoHS 2011/65/EU directives, and meets EMC standards EN 61131-2:2007 for industrial environments. This unit is covered by Omron's standard 1-year manufacturing warranty from date of purchase.