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5 Pin Relay - DC 24V - ERL4

5 Pin Relay - DC 24V - ERL4

This 5 Pin Relay operates on DC 24V and features a changeover function. It is designed for general...

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eBay5 Pin Relay DC 24V Change Over - ERL4
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B&QB&Q - 5 Pin Relay 24V 10/20A Changeover Erl4 Qty 1
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Product Information

Full details

The Mehr 5 Pin Relay (ERL4) is designed for general maintenance and electrical control applications operating on DC 24V. It offers a reliable changeover function, making it suitable for hobbyists and professionals alike who need a dependable component for their tool collections. While versatile, its specific DC 24V requirement means it's not universally compatible with AC power systems.

All features

Model Part NumberERL4
BrandMehr

Extended Product Information

FAQs

What type of power does this relay use?

This relay is designed exclusively for DC 24V power.

Can I use this relay with AC power?

No, this relay is strictly for DC 24V and cannot be used with AC power.

What does 'changeover function' mean?

It means the relay has a common terminal that can switch between two other terminals: a normally closed (NC) terminal and a normally open (NO) terminal. This allows it to control two different circuits or switch a circuit on or off.

How many relays are included?

The relay is sold individually, so one unit is included per purchase.

What are the current ratings for the contacts?

The relay has a 10 Amp rating on one set of contacts and a 20 Amp rating on the other set.

Does it come with mounting hardware?

Yes, it includes a metal fixing plate for secure mounting.

Troubleshooting

Relay does not switch when coil is energized.

Verify the DC 24V power supply is correctly connected to the coil terminals and providing the correct voltage. Check for proper polarity.

Continuity is not as expected between contacts.

Ensure the relay is correctly wired and that the load it is switching is within the 10A/20A rating. Check if the correct terminals (common, NO, NC) are being used for the application.

Relay makes a clicking sound but doesn't switch loads.

The load current may be too high for the relay's rating, or there might be a short circuit in the load wiring. Verify load current and check wiring.

Relay coil appears to be damaged.

Visually inspect the coil terminals and wiring for any signs of damage. If damaged, the relay will need replacement.

Pros and Cons

Pros

  • Reliable changeover (DPDT) functionality.
  • Includes a convenient metal mounting plate.
  • Suitable for 24V DC applications.
  • Robust build for general use.

Cons

  • Limited to DC 24V power sources; not compatible with AC.
  • Specific voltage requirement may limit universal application.
  • Sold individually, requiring multiple purchases for complex systems.

Setup, Compatibility & Care

Setup:

  1. Identify Terminals: Familiarize yourself with the 5 pin layout: typically two coil terminals and three switched terminals (common, normally open, normally closed).
  2. Mounting: Secure the relay using the pre-attached metal fixing plate to a stable surface.
  3. Wiring: Connect the 24V DC power source to the coil terminals. Ensure correct polarity (+/-).
  4. Load Wiring: Connect your control circuits to the common, normally open, and normally closed terminals according to your desired switching logic.

Compatibility:

  • Voltage: Strictly compatible with DC 24V power supplies only. Do not attempt to use with AC power or other DC voltages.
  • Current: Ensure the load current does not exceed the relay's ratings (10A/20A depending on the contact).

Care:

  • Keep the relay clean and dry.
  • Avoid exposing it to excessive heat, dust, or moisture.
  • Periodically check wiring connections for tightness and corrosion.

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