HYFIRE POWER SUPPLY UNIT

HFW-PSU2-03

The Hyfire HFW-PSU2-03 is an EN54-4 approved 24V 2A power supply unit, ideal for use in fire and smoke and ventilation control systems. This device provides compliant power supply and continuity to Taurus expanders. It includes intelligent battery charging, mains and battery monitoring with independent volt-free outputs, and battery deep discharge protection for prolonged mains failure. LED indicators offer quick diagnostics of the power supply status.

Main Features

27.6V dc output
Intelligent battery charging and monitoring using Deep Discharge Protection
Full rated current to load plus additional current for battery charging
Remote fault signalling
Volt-free fault output - EPS: Mains fail
Volt-free fault output - PSU fault: Battery fault, Charger fault, Loss of output
Mains transient protection
5 year warranty

Connections

The unit connects to expanders. A typical setup involves a PSU unit connected to an Expander unit.

Technical Specifications

Parameter	Specification
Output	27.6 V dc
Mains Input	264 V ac
Operating temperature	-10 to 40°C at 95% RH
Dimensions	275 x 330 x 80 mm

Standards and Approvals

Certified by UL (EN54-4:1997 + A1: 2002 + A2: 2006)
CE mark
RoHS Compliant

Fault Diagnostics

Mains Fault

Condition	Possible Cause	Action
Standby Mode (ESP Fault Open, GEN Fault Closed)	Loss of mains, Battery driving load	Investigate

Battery Fault

Condition	Possible Cause	Action
Fault Present (ESP Fault Closed, GEN Fault Open)	Battery fault, Internal fault diagnostic LED	Investigate fault source using LED. Rectify fault where possible.

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