The Omron NX-PA9001, also cataloged as the NX-PA9001 Power Supply Unit, operates as a dedicated hardware component for primary AC power conversion and system bus power delivery within NX-Series control racks.

Power Conversion Architecture & Operational Limits

The hardware accepts a wide-range input voltage spanning 100 to 240 VAC (85 to 264 VAC absolute limits) at 50/60 Hz (47 to 63 Hz). Total output power delivery capability reaches 90 W max., maintaining high system conversion efficiency under full operational load. Cold-start inrush current is limited to 20 A at 100 VAC and 40 A at 200 VAC within an 8 ms pulse window at ambient temperature. An integrated SPST-NO RUN contact provides discrete system status signaling rated up to 250 VAC, 2 A for resistive loads.

Technical Performance Matrix

Backplane Power Distribution & Control Network Stability

The supply unit provides regulated power directly across the backplane bus, enabling predictable backplane bus communication velocity and sustained network processing across connected CPU modules and expansion drops. High dielectric isolation (2,300 VAC for 1 minute between AC external and GR terminals) shields sensitivity in EtherNet/IP and EtherCAT deterministic networks from transient line surges, suppressing noise coupling across dense local I/O configurations.

Package Component List

• 1 x Omron NX-PA9001 Power Supply Unit
• 1 x AC Input Terminal Connector Assembly
• 1 x Grounding Clip Terminal Block
• 1 x Hardware Instruction Manual Sheet

Field Cabinet Installation & Grounding Rules

• Mount the module firmly on a standard 35 mm DIN rail in an upright vertical orientation to optimize natural heat dissipation.
• Maintain a clearance of at least 50 mm above and below the power module casing to facilitate unhindered airflow.
• Connect a dedicated protective earth conductor to the GR terminal using a low-impedance wire bond to meet noise immunity standards.
• Ensure AC input wiring is routed in a separate wire channel away from sensitive DC signal lines and fieldbus communications.

Frequently Asked Questions

• Q: What is the permitted input voltage range for main power input?

  A: The unit accepts a rated supply of 100 to 240 VAC, operating across an extended absolute limit of 85 to 264 VAC.

• Q: What total power output capacity does the unit supply to the system?

  A: The module supplies up to 90 W total maximum power capacity to the internal bus and connected racks.

• Q: What are the electrical ratings of the integrated RUN status contact?

  A: The SPST-NO contact supports switching up to 250 VAC at 2 A resistive load and 120 VAC at 0.5 A inductive load.

• Q: How much peak inrush current occurs during a cold start at 200 VAC?

  A: The inrush current reaches a maximum of 40 A for a duration of 8 ms during room temperature cold startup.

• Q: What dielectric isolation strength is specified across external AC and GR terminals?

  A: It withstands 2,300 VAC at 50/60 Hz for 1 minute with a leakage current limited to 5 mA maximum.

• Q: Is a separate service power output terminal provided on the front panel?

  A: No, an external auxiliary service power output terminal is not provided on this hardware configuration.

• Q: What insulation resistance level is measured between AC external and GR terminals?

  A: The insulation resistance measures 20 Mohm minimum when tested at 500 VDC between terminals.

• Q: What is the gross shipping weight for transport calculations?

  A: The individual net weight is 0.57 Kg, while the complete protective shipping package weighs 3 Kg.