Omron CJ1W-SCU31-V1 CJ Series Serial Communications Unit

SKU CJ1W-SCU31-V1

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12-month warranty
Free returns within 30 days

Manufacturer: Omron
Product No.: CJ1W-SCU31-V1
Origin Japan
Product Type: Serial Communication Modules
Payment: T/T, Western Union
Weight: 0.11 kg
Shipping port: Xiamen
Warranty: 12 months

Product Description

Description

Engineered for high-performance integration within industrial control architectures, the Omron CJ1W-SCU31-V1 functions as a highly versatile serial communications module within the CJ-series PLC system. This CPU Bus Unit facilitates seamless, high-speed data exchange between the CPU and external peripheral devices via dual serial interfaces. Equipped with two RS-422A/485 ports, the unit supports diverse communication protocols including Host Link, protocol macro, NT Link, and loopback testing to accommodate precise industrial networking configurations.

With firmware Unit Ver. 1.2 or later, the CJ1W-SCU31-V1 extends its capabilities to include Serial Gateway functionality, no-protocol communications, and 1:1 Host Link modes. For Modbus architectures, Unit Ver. 1.3 or later adds native Modbus-RTU slave mode support. The system architecture permits mounting up to 16 CPU Bus Units per CPU Rack or Expansion Rack, allocating 25 CIO words and 20 DM words for consistent cyclic and event-driven data transfer.

Features

Dual RS-422A/485 serial ports optimized for balanced, long-distance communication.
Broad protocol compatibility featuring Host Link, protocol macro, and NT Link.
Advanced connectivity modes including Serial Gateway, no-protocol, and Modbus-RTU slave (dependent on unit version).
Efficient backplane data exchange using 25 words in the CPU Bus Unit CIO Area.
Dedicated DM Area allocations of 10 words per port for simplified configuration and parameter settings.
Simple Backup Function allows backing up protocol macro data directly to the CPU Unit's memory card (supported on CJ1-H and CJ1M CPU Units).

Applications

SCADA and HMI integration in manufacturing and assembly environments.
Modbus-RTU device monitoring and control in utility and water treatment systems.
Distributed control networks utilizing protocol macro configurations for proprietary serial devices.
Material handling, warehousing, and process automation lines.

Technical Specifications

CategorySpecification Parameter

Manufacturer	Omron
Part Number / Model	CJ1W-SCU31-V1
Classification	CPU Bus Unit
Port 1 Interface	RS-422A/485
Port 2 Interface	RS-422A/485
Protocols (Port 1)	Host Link, protocol macro, NT Link, loopback test
Protocols (Port 2)	Host Link, protocol macro, NT Link, Serial Gateway, no-protocol, Modbus-RTU slave (Unit Ver. 1.3 or later)
Maximum Mountable Units	Up to 16 Units per Rack (including other CPU Bus Units)
CIO Area Allocation	25 words
DM Area Allocation	20 words (10 words per port)
Current Consumption	380 mA (from 5V DC backplane power supply)
Weight	0.11 kg maximum

Connections and Interfaces

Interface Port	Physical Standard	Supported Connection Modes
Port 1	RS-422A/485 (2-wire/4-wire)	Host Link, protocol macro, NT Link, loopback test
Port 2	RS-422A/485 (2-wire/4-wire)	Host Link, protocol macro, NT Link, Serial Gateway, no-protocol, Modbus-RTU slave

Installation Guidelines

Always shut off the power supply to the PLC system before mounting or removing the CPU Bus Unit.
Slide the unit securely into the designated slot on the CJ-series CPU Rack or Expansion Rack, ensuring the locking sliders are fully engaged.
Configure terminal block connections and termination resistors according to your RS-422A/485 network topology specifications.
Isolate communication cables from high-voltage wiring to minimize electromagnetic interference.

Shipping & Returns

Global Express Shipping

Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our technical warranty.

FAQ

What protocols are supported on the Omron CJ1W-SCU31-V1?

The unit supports Host Link, protocol macro, NT Link, loopback testing, Serial Gateway, no-protocol mode, and Modbus-RTU slave (with Unit Ver. 1.3 or later).

How many CJ1W-SCU31-V1 modules can be mounted on a single CJ1 system?

A total of up to 16 CPU Bus Units, including the CJ1W-SCU31-V1, can be mounted across the CPU Rack and Expansion Racks.

Does the CJ1W-SCU31-V1 support backup functions?

Yes, the Simple Backup Function is supported when used with CJ1-H and CJ1M CPU Units, allowing protocol macro data to be saved to and restored from the CPU's memory card.

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