Hager EPN Bistable Relay - EPN524
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Product Information
Full details
This Hager EPN524 impulse relay is designed for electrical professionals managing lighting circuits up to 16A. Its key benefit is reliable control of lighting groups with the added convenience of manual switching and clear contact status indication. A potential consideration is its specific AC control voltage requirements.
All features
| Series | EPN |
|---|---|
| Model Part Number | EPN524 |
| Brand | HAGER |
Extended Product Information
FAQs
What is an impulse relay?
An impulse relay, also known as a latching relay or bistable relay, changes its contact state each time it receives an impulse signal. It holds its state without continuous power, unlike a standard relay.
What types of loads can the EPN524 control?
The EPN524 is suitable for controlling lighting loads, including incandescent lamps (up to 2300W), fluorescent lamps (up to 1200VA), and parallel compensated fluorescent lamps (up to 1000VA). It has a maximum switching current of 16A.
What voltage is required for control?
The Hager EPN524 can be controlled using either 24V AC or 12V DC. The supply voltage for the switched circuit is up to 250V AC.
Can I mount auxiliary elements to this relay?
Yes, the auxiliary elements for the Hager EPN impulse relay can be easily mounted without the need for tools.
How many contacts does this relay have?
The EPN524 model features two normally open (make) contacts.
What is the mounting method?
It is designed for mounting on a standard 35mm DIN rail, which is common in electrical distribution boards and enclosures.
What is the benefit of manual switching?
Manual switching allows you to directly operate the relay without sending an electrical impulse. This is useful for testing, maintenance, or emergency override of the connected lighting circuit.
Troubleshooting
Relay does not switch when impulse is applied.
Verify the control voltage is correctly applied to the relay's input terminals (24V AC or 12V DC). Check that the impulse signal is being sent correctly and that the control wires are securely connected.
Relay remains energized or de-energized and does not change state.
Ensure the impulse signal is brief (as required for impulse relays). Check for any continuous signal on the impulse input which might be preventing a state change. Confirm the supply voltage is stable.
Overheating or unusual noise from the relay.
Immediately de-energize the circuit. Check the connected load against the relay's maximum ratings (16A, 2300W incandescent, 1200VA fluorescent). Ensure wiring is correct and secure. If the issue persists, replace the unit.
Contacts not making connection.
Confirm the relay has received a valid impulse to switch states. Check the wiring to the load circuit connected to the relay's output contacts.
Pros and Cons
Pros
- Reliable control for lighting circuits up to 16A.
- Intuitive manual operation and status indication.
- Easy installation of auxiliary components without tools.
- Compact design, occupying only one modular spacing on DIN rail.
- Suitable for various load types, including incandescent and fluorescent lamps.
Cons
- Requires specific AC control voltages (24V AC or 12V DC) which may necessitate compatible power sources.
- Primarily designed for lighting control; may not be suitable for high-power motor loads.
- Only offers normally open contacts, limiting some complex switching configurations.
- Does not have normally closed contacts, which are sometimes needed for fail-safe operations.
Setup, Compatibility & Care
Setup:
- Mount the EPN524 relay onto a standard 35mm DIN rail within an electrical enclosure.
- Connect the control voltage to the designated terminals (24V AC or 12V DC). Ensure the voltage matches the specifications.
- Wire the lighting circuit through the relay's two make contacts (terminals 13-14 and 23-24).
- Connect the impulse control input according to the wiring diagram for manual or automated switching.
Compatibility:
- Compatible with 24V AC or 12V DC control systems.
- Suitable for AC circuits with supply voltages up to 250V.
- Designed for standard electrical panel installations using DIN rails.
Care:
- Ensure the unit is de-energized before performing any maintenance.
- Clean the exterior with a dry or slightly damp cloth. Avoid solvents or abrasive cleaners.
- Periodically check wiring connections for tightness and signs of wear.