EN54 AC/DC Power Supply - 27.6V, 5A
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Product Information
Full details
This HAYDON EN54 AC/DC Power Supply is designed for fire alarm systems, providing essential additional power for auxiliary devices. It offers a stable 27.6V DC with a 5A output and seamlessly switches to battery power during mains failure, ensuring uninterrupted operation. While highly reliable for its intended purpose, users should ensure adequate battery backup is installed to meet specific system demands.
All features
| Model Part Number | HAY-PSUEN54-5A |
|---|---|
| Brand | Haydon |
Extended Product Information
FAQs
What type of batteries are recommended?
Maintenance-free lead-acid batteries are recommended for backup. Typically, two 12V batteries are used in series to achieve the required voltage.
Does the power supply come with batteries?
No, the batteries are supplied separately. The enclosure is designed to house two batteries.
What is the maximum continuous current output?
The power supply provides a maximum continuous output of 5 Amperes (5A) at 27.6V DC.
How do I know if the unit is running on battery power?
The green LED indicates mains power is present. If the green LED is off and the yellow (fault) LED is on, it typically indicates a mains power failure and the unit is running on battery backup.
What does the amber LED signify?
The amber LED indicates an engineer fault, providing more specific diagnostic information about a system issue. Refer to the detailed technical manual for fault code interpretation.
Can this power supply be used for general-purpose applications?
While it provides a stable DC output, it is specifically designed and certified for EN54 compliant fire alarm systems. Its use in other applications may not be appropriate or compliant with relevant safety standards.
What is the battery charging current range?
The battery charging supply ranges between 500mA and 800mA, depending on the specific model variant.
Troubleshooting
No output voltage
Check mains power connection. Verify battery connections and charge state. Inspect fuses (if applicable) and the unit's internal connections.
Yellow (Fault) LED is on
Check battery connections. Ensure batteries are adequately charged and healthy. Verify that the load does not exceed the 5A rating. Refer to the amber engineer fault LED for more specific diagnostics.
Amber (Engineer Fault) LED is on
Consult the full technical manual for specific fault code interpretation. Common causes include deep discharge protection activation or overload conditions. Allow the unit to cool and reset if overloaded.
Unit overheating
Ensure adequate ventilation around the unit. Check that the connected load does not exceed the 5A rating. Verify battery health, as faulty batteries can sometimes cause increased current draw.
Fault reporting outputs not working
Verify that the GEN and EPS terminals are correctly wired to the monitoring system. Ensure the monitoring system is functional and configured to receive these signals.
Pros and Cons
Pros
- Ensures continuous power to critical fire alarm auxiliary devices.
- Compliant with strict EN54-4 safety standards.
- Automatic switchover to battery power is seamless.
- Durable metal enclosure provides robust protection.
- Includes clear LED indicators for system status.
- Offers protection against battery over-discharge and system overload.
Cons
- Requires user-provided batteries (lead-acid recommended).
- Fault reporting outputs require integration into a monitoring system.
- Battery charging current is fixed and may not suit all battery types or sizes.
- Primarily designed for fire alarm systems; less versatile for general use.
Setup, Compatibility & Care
Setup:
- Ensure the unit is installed in a suitable location, typically near the fire alarm control panel and within proximity of the auxiliary devices it will power.
- Connect the mains AC input according to local electrical codes.
- Connect the DC output terminals to the auxiliary devices. Observe polarity carefully.
- Install two suitable maintenance-free lead-acid batteries (e.g., 12V each) in the provided enclosure, ensuring correct series or parallel connection as required for the 27.6V output.
- Connect the battery terminals to the designated battery terminals on the power supply. Observe polarity.
- Connect the GEN and EPS fault reporting outputs to your monitoring system if applicable.
Compatibility:
- Designed for use with fire alarm systems compliant with EN54-4 standards.
- Requires two compatible 12V maintenance-free lead-acid batteries for backup (not included).
- Compatible with auxiliary fire alarm devices requiring a stable 27.6V DC supply up to 5A.
Care:
- Keep the unit clean and free from dust using a dry or slightly damp cloth. Avoid harsh chemicals.
- Regularly inspect batteries for signs of corrosion or damage. Clean terminals as needed.
- Periodically test the system's battery backup functionality according to fire safety regulations and manufacturer recommendations.