Omron CJ1W-SCU21-V1 Programmable Logic Controller
The Omron CJ1W-SCU21-V1 Programmable Logic Controller (PLC) Serial Communications Unit is equipped with 2 serial ports supporting RS-232C and RS-422A/485 interfaces. Each port can be used for host link, NT link, or serial gateway communication. It provides reliable data exchange for Omron PLC systems. Manufactured by Omron, part of the Omron Programmable Logic Controller family, available under the Omron CJ1W Series.
| Brand | Omron |
| Product Type | Programmable Logic Controller |
| Model Number | CJ1W-SCU21-V1 |
| Specification | Value |
|---|---|
| Unit type | CPU Bus Units |
| Product name | Serial Communications Units |
| Applicable PLC models | CJ Series |
| No. of unit numbers allocated | 1 |
| Communications Interface | 2 RS232C ports |
| Communications functions | The following functions can be selected for each port: • Protocol macro • Host Link • NT Links (1:N mode) • Serial Gateway • Noprotocol • ModbusRTU Slave |
| Current consumption | 5 V DC at 280 mA max. |
Omron is a trusted name in industrial automation, providing robust and modular solutions for PLC-based control systems. The CJ-series PLCs are widely adopted for their flexibility and integration capabilities in modern manufacturing environments. As part of this platform, the CJ1W-SCU21-V1 enhances the communication layer by allowing PLCs to connect with external devices, sensors, and HMIs over standard serial protocols.
The Omron CJ1W-SCU21-V1 is a CPU Bus Serial Communications Unit featuring 2 RS232C ports. Each port supports selectable communication modes including Protocol Macro, Host Link, NT Links (1:N), Serial Gateway, No Protocol, and Modbus RTU Slave. This flexibility enables the module to communicate with barcode readers, temperature controllers, inverters, and other field devices. It consumes 280 mA at 5 VDC and fits into a single unit number slot in the CJ-series rack.
The CJ1W-SCU21-V1 is ideal for applications requiring multi-device communication with Omron PLCs. It simplifies integration in automation setups like packaging lines, robotic cells, process control systems, and machine interfaces where real-time data exchange is critical. Engineers use this module to bridge communication between Omron controllers and third-party devices, improving monitoring, control accuracy, and system responsiveness. Its compact design, wide protocol support, and stable performance make it a dependable component for both new installations and system upgrades.
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