Configured for internal rack voltage conversion and bus power distribution in CV Series PLC platforms, the Omron CV500-PS221 (CV500 Power Supply Module) provides direct physical/electrical execution. It transforms incoming 100 to 240 VAC mains power into a regulated 5 VDC logic supply rail across the backplane chassis, energizing installed CPUs, memory units, and peripheral I/O modules without voltage drift.

Model Designation Architecture

• CV500: Base system platform family code for CV Series modular automation hardware.
• PS: Power supply module functional classification.
• 221: High-capacity AC input power supply variant with auto-setting wide input ranges.

Physical & Electrical Parameters

Controller Backplane Power Distribution

The CV500-PS221 provides stable regulated DC power across the internal backplane bus to ensure consistent communication velocity across high-density I/O rack configurations. Stabilized current delivery prevents voltage drop faults during peak CPU processing loads and firmware flash compatibility routines. By maintaining strict power isolation thresholds, the module protects backplane signal lines from high-voltage AC line transients and thermal noise propagation.

Shipping Kit Contents

• 1 x Omron CV500-PS221 Power Supply Module
• 1 x Removable Terminal Block Guard Cover
• 1 x Hardware Setup Guide Sheet

Cabinet Installation & Wiring Protocol

Chassis Slot Mounting

• Mount the module securely into the designated leftmost power supply slot on the CV Series backplane base rack.
• Tighten top and bottom retaining screws to 0.8 N m to ensure structural grounding and eliminate chassis displacement from mechanical shock.

AC Power Field Terminal Wiring

• Wire AC input supply conductors to the M3.5 screw terminal block using crimped insulation ring terminals.
• Connect a dedicated protective earth ground conductor to the module GR terminal using a short wire run (less than 10 meters) to minimize ground loop impedance.

Frequently Asked Questions

• What is the output power capacity rating of the CV500-PS221 backplane output?

  The module delivers a 5 VDC logic supply output at a maximum current rating of 12 A directly to the backplane chassis bus.

• Does the power supply require manual jumper selection for 100 VAC or 200 VAC input selection?

  No, the internal sensing circuitry automatically adjusts to the detected line voltage within 85 to 132 VAC or 170 to 264 VAC operating windows.

• Which Omron controller rack systems support the CV500-PS221 module?

  The power supply is compatible with CV500, CV1000, CV2000, and CVM1 Series PLC base and expansion racks.

• Can this module be hot-swapped while the rack backplane remains energized?

  No, primary AC power must be disconnected before installing, removing, or servicing the power supply unit.

• What wire gauge is recommended for connecting input power to the terminal block?

  Use stranded copper wiring with a cross-sectional area between 1.25 mm2 and 2.0 mm2 rated for a minimum of 600 V.

• What protection mechanism guards against output current overload?

  Internal current-limiting circuits fold back the 5 VDC rail voltage when current demand exceeds 12 A, auto-recovering when the load drops below maximum ratings.

• What is the maximum power consumption rating of the CV500-PS221 unit?

  The unit draws a maximum input power of 500 VA under full load conditions across the backplane bus.

• What terminal tightening torque should be applied during AC line connection?

  Tighten M3.5 terminal screws to a torque spec between 0.8 N m and 1.2 N m to maintain gas-tight electrical contacts.