Haydon HAY-PSUEN54-5AL EN54-4 Power Supply | 24V DC, 5A, Large Enclosure
£141.10 (inc VAT: £169.32)
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Key features
- 5A output with 2x18Ah battery capacity
- Two-stage charging for full capacity
- GEN and EPS fault reporting outputs
Downloads
Summary
The Haydon HAY-PSUEN54-5AL is a 27.6VDC power supply unit (PSU) built for fire systems that need a serious reserve of standby power, pairing a 5A output with a large enclosure sized for 2 x 18Ah batteries. That combination of output current and battery capacity means you can run more auxiliary devices for longer without mains power, all from a single enclosure.
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For you on site, that translates into fewer compromises when sizing standby power for larger installations - no need to split the load across multiple smaller units or find space for an external battery box. The unit switches to battery automatically on mains failure, and two-stage charging keeps those larger batteries topped up efficiently once power returns.
Fault reporting is built in via GEN and EPS volt-free outputs, so the fire panel knows the status of this supply at all times, and on-site diagnostics are handled through green, yellow and amber LEDs that you can read straight off the front of the unit.
Features
- Large battery enclosure - houses 2 x 18Ah batteries for extended standby runtime on bigger auxiliary loads
- 5A output rating - powers more connected auxiliary devices from a single supply
- Two-stage charging - bulk charges to 80% within 24 hours and reaches full charge within 48 hours
- Deep discharge protection - disconnects batteries below 21V to prevent damage
- Battery monitoring - checks for low voltage, incorrect connection and short circuit
- Overload protection circuit - safeguards the PCB during short circuit or overload conditions
- GEN and EPS fault outputs - volt-free relay contacts give the fire panel remote status reporting
- LED diagnostics - green, yellow and amber LEDs give an instant on-site status check
- EN54-4:1997 +A1 +A2 compliant - certified for use with compliant fire detection and alarm systems
Specifications
| Rated Voltage/Frequency | 110-240V AC, 47-63Hz |
|---|---|
| Input Current | 1.2A |
| Mains Fuse Rating | F3A |
| Output Voltage (Mains Power) | 22.0-27.6Vdc |
| Output Voltage (Battery Standby) | 20.0-26.0Vdc |
| Ripple | <180mV |
| Output Fuse | F5A |
| Battery Fuse | F5A |
| Imax A (With Charging) | 5A |
| Imax B (No Charging) | 5.8A |
| Battery Capacity | 2 x 18Ah |
| Maximum Battery Internal Resistance | 5Ω |
| Minimum Load Current | 0.1A |
| Battery Charging | Two stage: bulk charge to 80% within 24 hours, float charge to 100% within 48 hours |
| Constant Current Charge | 0.8A |
| Temperature Compensation | -30mV/°C (0-50°C) |
| Low Battery Voltage Trigger | 23V |
| Deep Discharge Protection Cut Out | 21V |
| GEN Output | Normally closed, 0.5A @ 60Vdc; opens if mains failed and battery voltage below 23V or on fault condition |
| EPS Output | Normally closed, 0.5A @ 60Vdc; opens if loss of mains for more than 10 seconds |
| Operating Temperature | -20°C to +45°C, 20-90% RH non-condensing |
| Storage Temperature | -25°C to +85°C, 10-90% RH non-condensing |
| Enclosure Material | 1.2mm steel, white powder coated |
| Enclosure Dimensions (W x H x D) | 420 x 400 x 80mm |
| Weight (Excluding Batteries) | 5.2kg |
| Weight (With Batteries Fitted) | Approximately 18.5kg |
| Approvals | EN54-4:1997 +A1 +A2; EMC 2014/30/EU; LVD 2014/35/EU; RoHS2.0 2011/65/EU; Environmental Class II |
FAQ
With two 18Ah batteries installed the unit weighs approximately 18.5kg, so confirm your wall fixings and the mounting surface can support this before you commit to a position. Use a minimum 0.75mm² cable with earth for the mains input, and a minimum 0.75mm² cable for the 5A output. Bring mains and low voltage cables in through separate knockouts and secure them to the cable anchors provided. The batteries connect in series using the supplied short bridging wire, run from the positive terminal of one battery to the negative terminal of the other. The temperature sensor’s two white wires can be connected either way round. The yellow fault LED starts flashing within a minute and the amber diagnostic LED repeats a two-flash pattern per the fault finding guide. The GEN output also opens to signal the fault condition to the fire panel. No, this EN54 power supply range is for internal use only. It should be installed on a dedicated mains circuit with a labelled Fire Alarm Mains Power Isolation Switch fused at a maximum of 5 amps. Any circuit connected to the GEN and EPS fault outputs must operate below 60Vdc, as these are volt-free relay contacts rated at 0.5A @ 60Vdc.How much does the HAY-PSUEN54-5AL weigh once batteries are fitted?
What cable sizes should I use for mains and output wiring?
How are the two batteries wired together?
What happens if a battery becomes disconnected or faulty?
Is this unit suitable for outdoor installation?
Can the GEN and EPS outputs be wired into any circuit?
Downloads
- Datasheet (Adobe PDF)
Additional information
| Output Current | 5A |
|---|---|
| Device Type | |
| Battery Charging | Yes |
| Maximum Batteries | 2 × 18Ah |
| Colour | |
| Mounting | Surface |
| Fault Relay / LED |
