HONEYWELL FC-PSU-UNI2450U V 24 V DC 50 A Power Supply Module

Description

Key Technical Specifications

Product Introduction & Supply Chain Strategy

The Honeywell FC-PSU-UNI2450U V is a high-efficiency universal power supply unit designed for Honeywell Safety Manager and Fail Safe Control (FSC) safety instrumented systems (SIS). It converts wide-range AC or DC mains voltage into a clean, regulated 24 V DC bus supplying power to process safety CPUs, safety I/O modules, and field transmitter loops across critical process plants.

Maintaining an FC-PSU-UNI2450U V as New Surplus is a critical risk-mitigation strategy for safety system lifecycle planning. A sudden power supply failure in a non-redundant rack or a secondary failure in a degraded N+1 cluster results in an immediate loss of safety coverage, triggering emergency shutdown (ESD) valves and plant-wide trips. Refurbished power supplies pose high operational risks due to dried-out electrolytic filter capacitors and thermally stressed power MOSFETs. Purchasing genuine New Surplus guarantees factory-fresh capacitors, full 1,200 W output capacity, and complete operational peace of mind at an optimal Total Cost of Ownership (TCO).

FC-PSU-UNI2450U V

FC-PSU-UNI2450U V

Installation & Configuration Guide

Stage 1: Pre-Installation (Prep & Safety)

1. Isolate main AC/DC supply breakers feeding the power supply sub-rack and execute Lock-Out/Tag-Out (LOTO) protocols.
2. Verify that parallel power supplies in the redundant chassis are operating normally and carrying the load.
3. Put on a grounded ESD wrist strap before handling power terminal wiring or signal lines.
4. Set the output voltage trimming potentiometer on the front panel to match the plant’s target bus voltage (typically 24.5 V DC) before locking it into the chassis.

Stage 2: Removal

1. Disconnect the AC input line plug and 24 V DC output bus bar connections from the terminal strip.
2. Unplug the Power OK (POK) diagnostic signal harness.
3. Loosen the front-panel mounting screws securing the FC-PSU-UNI2450U V module to the rack enclosure.
4. Slide the heavy power module straight out of the power shelf using both hands to support its weight.

Stage 3: Installation (Clone & Seat)

1. Align the replacement FC-PSU-UNI2450U V with the sub-rack mounting rails.
2. Slide the unit firmly into the slot until the front flange rests flat against the rack frame.
3. Tighten all retention screws to 1.2 Nm (10.6 in-lb) to secure chassis grounding and mechanical stability.
4. Reattach the AC/DC input cabling, 24 V DC output bus bars, and POK diagnostic alarm harness.

Stage 4: Power-On & Testing

1. Re-apply input line power to the module.
2. Check the front-panel status indicators:
   • DC OK LED (Green): Indicates output voltage is stable and within the 24 V DC operating window.
   • ALARM / FAULT LED (Red/Off): Indicates input UVLO, output overvoltage, or internal thermal fault.
3. Measure output voltage at the terminal points with a calibrated digital multimeter to confirm proper load balance across parallel supplies.

Firmware/Software Versions & Upgrade Notes

• System Integration: Hardware-level power generation module requiring no software or firmware loading.
• Redundancy Management: Fully compatible with Safety Manager diagnostic blocks (SDU) via dry-contact POK monitoring.
• Replacement Warning: When replacing an older non-“V” suffix unit (FC-PSU-UNI2450U), verify mechanical mounting brackets and terminal shroud clearance. Always ensure load sharing across parallel power supplies is balanced to within ±0.2 V DC to prevent premature thermal aging on a single dominant supply unit.

Frequently Asked Questions (FAQ)

What does the “V” designation indicate in the FC- V model number?

The “V” designation represents an updated hardware revision featuring improved thermal management components, higher-efficiency power electronics, and full compliance with updated industrial EMC/EMI safety standards. It is 100% backward compatible with legacy non-“V” FC- units.

How do you verify that these FC- V power supplies are New Surplus?

Every unit we deliver is sourced from authorized project cancellation holds and verified OEM spare stock. Modules are unused, uninstalled, and delivered in original anti-static packaging with zero terminal screw wear, pristine heat-sink fins, and verifiable Honeywell serial tags.

Can I hot-swap the FC- V module while the Safety Manager system is running?

Yes. If the Safety Manager power chassis is configured with dual/redundant power modules (1+1 or N+1 configuration), you can hot-swap a faulty FC- V unit while the system remains live without interrupting the 24 V DC system bus.

Can this power supply operate on DC input voltages as well as AC?

Yes. The FC- V features a universal input stage capable of operating on both AC line power (85–264 V AC) and industrial DC station battery banks (100–300 V DC) without requiring jumper adjustments or switch changes.

What warranty is provided with this New Surplus Honeywell power supply?

We back this New Surplus Honeywell FC- V power supply with a comprehensive 1-year functional replacement warranty. If the module experiences output regulation failure or diagnostic alarm faults under normal operating conditions within 12 months, we replace it directly from our stock.