Description
Core Product Summary
The Honeywell FC-PSU-UNI2450U (including V2/V2.1 iterations) is a high-capacity universal power supply module engineered specifically for deployment within Honeywell Safety Manager and industrial automation architectures. It accepts a wide-range AC input and converts it into a regulated, high-current DC output designed to drive system racks, processor nodes, and extensive I/O subassemblies.
The unit features selectable DC output options (nominally 25 VDC or 28 VDC via DIP switch configurations) capable of delivering heavy continuous output currents to support redundant power-sharing architectures. Built with integrated hardware diagnostics, the module provides real-time status monitoring for internal temperatures, fan rotation speeds, and output voltage boundaries. Its robust industrial housing incorporates specialized cooling and fault-isolated connection interfaces suitable for continuous-duty safety-critical environments.
Key Technical Specifications
| Specification | Parameter Value |
| Product Type | Universal Power Supply Unit (PSU) |
| System Family | Honeywell Safety Manager / DCS |
| Input Voltage Range | 110–240 VAC (operating range: 93–253 VAC), 47–63 Hz |
| Output Voltage Options | Selectable 25 VDC (default) or 28 VDC via DIP switch |
| Output Current Capacity | Up to 48 A at 25 VDC (or 43 A at 28 VDC) under standard operating limits |
| Hold-Up Time | Approx. 100 ms at full load |
| Operating Temperature | -5°C to +70°C (with thermal load derating above 50°C) |
| Storage Temperature | -25°C to +85°C |
| Relative Humidity | 5% to 95% non-condensing |
| Dimensions (W × H × D) | 420.5 × 140 × 90 mm |
| Weight | Approx. 5.7 kg |
| Approvals / Certifications | CE, TUL, UL, CSA, Class I Div 2 (CID2) |
Detailed Product Overview
The Honeywell FC-PSU-UNI2450U V2/V2.1 functions as a primary energy backbone for high-availability safety instrumented systems. Because safety controllers require uninterrupted, clean power to maintain loop integrity, this power supply module incorporates dual overvoltage protection circuits conforming to strict industrial safety standards, preventing downstream voltage spikes.
The unit features comprehensive on-board monitoring. Diagnostic LEDs and relay alarm contacts track operational health, signaling faults if internal temperatures exceed safety thresholds, cooling fan RPM drops below tolerance, or output rails drift out of regulation. It supports hot-swappable configurations when deployed within redundant frameworks, allowing individual modules to be isolated and replaced without bringing down the protected process.
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
| Host Architecture | Honeywell Safety Manager / DCS Platforms | Designed to power core processor chassis and associated I/O racks. |
| AC Input Connection | IEC 60320 C20 socket interface | Requires matching heavy-duty cabling and recommended 2.5 mm² (AWG 14) wire sizing. |
| DC Output Terminals | Dual Phoenix PCV6-16/2-G1F-10.16 connectors | Accommodates high-gauge industrial DC power distribution wiring. |
| Alarm Signaling Interface | 3-pole Phoenix MC socket | Dedicated relay contact output for external undervoltage fault monitoring. |
FC-PSU-UNI2450U V2
FC-PSU-UNI2450U V2
Dimensions, Mounting & Connection Notes
- Physical Dimensions: Width 420.5 mm, Height 140 mm, Depth 90 mm.
- Weight: Approximately 5.7 kg.
- Mounting Orientation: Supports vertical or horizontal installation (vertical preferred), requiring at least 100 mm of clear ventilation space above and below the chassis.
- Environmental Limits: Specified for ambient environments between -5°C and +70°C, subject to current derating guidelines at higher temperature extremes.
- Maintenance Protocols: Periodic inspection of cooling fans and cabinet dust filters is required; Honeywell recommends scheduled fan replacements to ensure continuous thermal dissipation.
FAQ
- What is the Honeywell FC-PSU-UNI2450U V2?
It is a high-capacity universal power supply unit built to provide regulated DC power for Honeywell Safety Manager safety instrumented system racks.
- What are the selectable output voltage options?
The module features a user-adjustable DIP switch to configure outputs at either 25 VDC or 28 VDC nominal.
- What input voltage does the module support?
It accepts a wide AC input range spanning from 110 VAC to 240 VAC (47–63 Hz).
- Does the module feature diagnostic alarm tracking?
Yes, it includes internal diagnostic monitoring with LED status indicators and a dry relay alarm contact for undervoltage, fan failure, or over-temperature conditions.
- Can these power supplies be run in a redundant configuration?
Yes, they are commonly deployed in dual or multi-unit redundant layouts where individual modules share the electrical load to maximize system availability.
Documented Performance Data
| Metric | Value / Range | Operating / Test Condition |
| Input Voltage Operating Span | 93 to 253 VAC (47–63 Hz) | Standard industrial AC mains |
| Maximum Continuous Output (25 VDC mode) | 48 A | Operating temperature between -5°C and +50°C |
| Maximum Continuous Output (28 VDC mode) | 43 A | Operating temperature between -5°C and +50°C |
| Power Efficiency | Up to 87% to 90% | Measured at nominal 230 VAC input load |
| Output Ripple and Noise | < 40 mVpp | Full operational load |
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