Honeywell FC-PSU-UNI2450 Universal Power Supply Unit

Product Description

The FC-PSU-UNI2450 (and its updated variant FC-PSU-UNI2450U) is a high-availability industrial power supply designed for the Honeywell Safety Manager system. It delivers stable 25 VDC or 28 VDC output to critical safety-instrumented systems (SIS), ensuring reliable operation of logic solvers and field devices even under fluctuating grid conditions.

With a rugged 5.7 kg construction and a 100 ms hold-up time, this power supply is built to ride through voltage dips without triggering nuisance trips. Dual overvoltage protection, low ripple (< 40 mVpp), and high efficiency (>87%) make it ideal for high-risk industrial environments including oil and gas, chemical processing, and power generation.

Technical Specifications

Key Reliability Features

• Extended Hold-up Time: 100 ms buffer prevents unnecessary shutdowns during transient voltage dips.

• Thermal Resilience: Operates reliably up to 70°C, ideal for dense cabinet or high-ambient installations.

• Stable Signal Delivery: Low ripple and noise safeguard sensitive analog and digital modules.

• Redundancy Ready: Compatible with N+1 or dual PSU configurations to ensure continuous system operation.

Technical FAQ

What is the difference between the FC-PSU-UNI2450 and the FC-PSU-UNI2450U?
The "U" (Universal) version features updated internal components and broader global certifications while remaining backward-compatible with the original 2450 footprint.

Can this power supply be used to power field actuators directly?
Yes, provided the total current does not exceed the PSU’s rated output. It is commonly paired with Power Distribution Boards (PDBs) to supply both the Safety Manager controllers and 24VDC field loops.