OVERVIEW

Official designation: Omron CJ1W-SCU21-V1 (CJ1W Series, Serial Communications Unit)

Role/Application: CPU Bus Unit for Omron CJ Series PLCs providing two RS-232C serial ports for high-speed data exchange using Host Link, Protocol Macro, and other communication modes.

KEY SPECS SUMMARY

Power: 5 VDC 280 mA max

Interfaces / Ports: Two RS-232C 9-pin D-Sub Male

Indicators: Refer to the latest manufacturer manual.

Operating Temp: 0 to 55 degrees C

Platform / Compatibility: CJ/CP1H/NSJ Series CPU

Limit: 115.2 kbps max baud rate

Lifecycle: Active

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the current consumption when a Link Adapter is connected to the unit?

A: Add 150 mA to the base 280 mA consumption for each NT-AL001 Link Adapter used.

Wiring & Installation:

Q: What is the maximum recommended cable length for the RS-232C communication ports?

A: The maximum recommended communications distance for the RS-232C port is 15 meters.

Troubleshooting & Compatibility:

Q: Which communication functions are supported for each port on the CJ1W-SCU21-V1?

A: Functions include Host Link, Protocol Macro, NT Link, Serial Gateway, No-protocol, and Modbus-RTU Slave.

Replacement & Upgrades:

Q: Which newer model offers a faster maximum communication baud rate than 115.2 kbps?

A: The CJ1W-SCU[]2 high-speed type units support a faster baud rate of up to 230.4 kbps.