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WAGO Relay Module - 857-304

WAGO Relay Module - 857-304

Compact 6mm wide relay module featuring a single changeover contact with 24VDC nominal input volta...

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eBayWAGO 857-304 24VDC 6A SPDT-CO DIN Rail Mountable Relay Module
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OnBuy.comWago 857-357 115V Ac/Dc 6A Spdt-Co Din Rail Mountable Relay Module Yellow 4055143656467
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Tameson UKWago Yellow 857-304 Relay Module 24Vdc 6A Single Changeover - 857-304
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eBayWAGO Relay Module 857-304 Dc 24 V 1 Changer Elementarrelais 857-152
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Product Information

Full details

The WAGO 857-304 is a compact relay module designed for industrial control applications where space is limited. It provides reliable electrical isolation for sensor/actuator levels and control systems, featuring a single changeover contact and a 24VDC input. While its narrow 6mm width is a key benefit for dense installations, users should note its specific 6A current limit.

All features

Series857
Model Part Number857-304
BrandWAGO

Extended Product Information

FAQs

What is the maximum current the WAGO 857-304 can handle?

The WAGO 857-304 is rated for a limiting continuous current of 6A.

What type of connection technology does this module use?

It uses WAGO's Push-in Cage Clamp connection technology for fast, tool-free wiring.

Can I use this relay module with AC control voltage?

No, this specific model (857-304) is designed for a nominal input voltage of 24VDC only.

What is the physical size of this relay module?

The module is very compact, measuring only 6mm in width.

How do I mount this module?

It is designed for standard 35mm DIN rail mounting.

Does the module provide visual feedback?

Yes, it includes a yellow status indicator that lights up when the relay coil is energized.

Is the internal relay replaceable?

Yes, the module features a miniature switching relay that can be replaced if necessary.

Troubleshooting

Relay does not energize when control voltage is applied

Verify that the control voltage is exactly 24VDC and correctly connected to the input terminals. Check if the yellow status indicator lights up. Ensure the input wiring is secure in the Push-in Cage Clamp terminals.

Relay does not switch the load circuit

Confirm that the relay is energized (yellow light on). Check the load wiring connections to the output contacts. Ensure the load does not exceed the 6A continuous current limit. Test the relay's output contacts for continuity when energized and de-energized.

Yellow status indicator is not lit

Check the polarity and voltage of the 24VDC supply. Ensure the control wires are properly inserted into the input terminals. If the relay itself is faulty, it may need replacement (though the module may allow internal relay replacement).

Pros and Cons

Pros

  • Extremely space-saving due to its narrow 6mm profile.
  • Tool-free wiring via Push-in Cage Clamp technology speeds up installation.
  • Clear visual status indication simplifies monitoring.
  • Designed for reliable electrical isolation in industrial environments.
  • Replaceable miniature relay simplifies maintenance.

Cons

  • Limited to a single changeover contact.
  • Maximum continuous current is capped at 6A.
  • Requires a 24VDC control voltage, not suitable for AC control circuits without conversion.
  • Front-entry wiring might require specific planning in tight spaces.

Setup, Compatibility & Care

Setup:

  1. Ensure the control voltage supply is within the 24VDC range.
  2. Mount the module onto a standard 35mm DIN rail.
  3. Connect the control signal wires to the input terminals using the Push-in Cage Clamp system. Insert solid or finely stranded conductors directly into the terminal points.
  4. Connect the load wires to the output contacts.
  5. Apply 24VDC to the input terminals; the yellow status indicator should illuminate if the relay is energized.

Compatibility:

  • Compatible with standard 35mm DIN rails (e.g., EN 60715).
  • Suitable for use with solid or finely stranded conductors from 0.5 mm² to 2.5 mm².
  • Designed for use with 24VDC control circuits.

Care:

  • The module requires no specific maintenance under normal operating conditions.
  • Ensure connections remain clean and free from debris.
  • In dusty or humid environments, periodic visual inspection of connections is recommended.
  • The internal miniature relay is replaceable if it fails, extending the module's lifespan.

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