Configured for power conversion and backplane power distribution in CJ Series PLC platforms, the Omron CJ1W-PA205C (CJ1W-PA205C Power Supply Unit) provides direct physical/electrical execution for system logic power generation and maintenance lifetime tracking.

Technical Identifier Matrix

Hardware Specifications

Backplane Bus Velocity and I/O Scaling Analysis

The Omron CJ1W-PA205C supplies isolated DC power directly to the internal CJ Series backplane bus, regulating regulated 5 VDC and 24 VDC rails to preserve backplane bus velocity during full I/O density expansion. Integrated voltage monitoring shields local CPU memory registers from brownout transients, maintaining bus timing determinism. Steady internal rail maintenance prevents backplane communication bus faults when driving high-density discrete and special I/O module clusters across multi-rack system architectures.

Package Contents & Ordering Information

• 1x Omron CJ1W-PA205C Power Supply Unit
• 1x Terminal Block Protective Cover
• 1x CJ1W-PA205C Hardware Manual

Field Installation Guidelines

• Rack Mounting: Secure the power supply module to the leftmost slot of the CJ Series CPU rack or expansion rack using the integrated backplane bus locking mechanisms.
• AC Wiring: Connect 100 to 240 V AC input power lines to the dedicated terminal block screws using crimp terminals with protective insulation sleeves.
• Grounding Procedure: Connect the functional ground (FG) and protective earth (PE) terminals directly to a panel single-point ground bus using a short, low-impedance copper conductor.
• Replacement Output Wiring: Connect dedicated alarm output lines from the replacement notification contact to an external monitoring system or digital input point for active lifetime status evaluation.

Frequently Asked Questions

• What is the primary function of the replacement notification feature on the CJ1W-PA205C?

  It monitors internal electrolytic capacitor degradation over operating time to alert users prior to power unit failure.

• What input voltage limits does the CJ1W-PA205C accept during continuous operation?

  The unit operates within an allowable AC line range of 85 to 264 V AC at 50/60 Hz frequency.

• Is the CJ1W-PA205C compliant with industrial voltage sag immunity standards?

  Yes, the module conforms to the SEMI-F47 standard for voltage sag immunity under full-load industrial AC conditions.

• Can the CJ1W-PA205C power supply unit be hot-swapped while the CPU is powered on?

  No, removing or installing the power supply module requires complete removal of incoming mains AC line power.

• What total 5 VDC output current capacity does the module supply to the backplane bus?

  The power supply unit delivers a maximum current output of 5.0 A at 5 VDC across the CPU backplane bus.

• Does the power supply module feature an internal RUN output relay contact?

  No, the CJ1W-PA205C features the replacement notification function, whereas the CJ1W-PA205R contains the RUN contact.

• How is functional grounding handled on the terminal connection block?

  A dedicated terminal screw provides functional grounding to route high-frequency line noise directly to panel earth.

• What action should be taken when the replacement notification display triggers?

  Schedule system maintenance to replace the power supply unit prior to capacitor failure and shutdown.