OVERVIEW

Official designation: Omron CJ1G-CPU42HFB (CJ1 Series, Advanced CPU Unit)

Role/Application: Advanced CPU unit for Omron CJ1 Series PLCs designed for high-speed industrial control with high I O capacity and flexible expansion.

KEY SPECS SUMMARY

Power: 5 VDC 0.91 A

Interfaces / Ports: RS-232C Peripheral Port

Indicators: RUN ERR COMM and MEMORY CARD

Operating Temp: 0 to 55 degrees C

Platform / Compatibility: CJ1 Series I O and Special I O Units

Limit: 960 I O points 30 Units max

Lifecycle: Obsolete (Production ended March 2012)

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the program capacity and minimum instruction execution time for this model?

A: Program capacity is 10K steps with a minimum LD instruction execution time of 0.04 us.

Wiring & Installation:

Q: What are the typical environmental limits for operation of the CPU Unit?

A: The unit must operate between 0 to 55 degrees C with 10 percent to 90 percent non-condensing humidity.

Troubleshooting & Compatibility:

Q: Which dedicated LED indicators are provided on the CPU Unit for status diagnostics?

A: Four LEDs are present to display the system status including RUN ERR COMM and MEMORY CARD activity.

Replacement & Upgrades:

Q: The original description mentions 20K steps; what unit is the recommended replacement for that capacity?

A: Refer to the latest manufacturer manual for specific 20K steps replacement recommendations as the CJ1G-CPU42HFB is obsolete.