Emergency Stop Switches / E-Stop Switches
Research Notes
1. What this is
51-259.0250 is a EAO Series 51 command switch.
2. Part-number decode
- Series: EAO Series 51
- Type: command switch
3. Compatibility & ordering
EAO (Switzerland) makes premium modular HMI command switches — pushbuttons, indicators, selectors, and E-stops in numbered series (04/14/45/51/56/61/82/84). Match by type, actuation, illumination, sealing, and mounting, then use the manufacturer datasheet to confirm the exact contact and termination encoded in the part number.
4. Data-quality note
The EAO series and switch type are decoded from the part number (grounded in the manufacturer catalog and distributor listings). The exact contact arrangement, termination, and cap/colour are encoded in the full order code — confirm against the datasheet for a precise order (not guessed here).
5. Sources
- EAO product catalog (eao.com)
- Distributor listing (DigiKey / Mouser) — search the exact part number
1 source
- EAO — 51-259.0250 — eao.com
Specificații
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Device class
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command switch
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Enriched by
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eao-decoder-2026-08-12
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Lead time
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0 Days
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Manufacturer series
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Series 51
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Mouser part number
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123-51-259.0250
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Pn status
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decoded
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Rohs status
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Series description
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EAO Series 51 — Swiss-made modular HMI command switch (pushbutton / illuminated pushbutton / indicator / selector / E-stop; operator + contact/LED elements assemble into a complete device)
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Referință rapidă de instalare
Panel cutout: 22mm. Mount with the yellow backing plate visible (required by EN/ISO 13850).
Wiring: Wire NC contacts in series with the safety relay input channels. Use dual-channel wiring for SIL 3 / PLe applications. Never wire directly to a motor contactor.
Testing: Press the e-stop and verify the machine stops within the required time. Test the reset mechanism. Repeat monthly per EN/ISO 13850.
Dimensiuni
Depanare
E-stop won't reset (twist/pull doesn't release)
Check for debris in the mechanism. For twist-release: turn clockwise 45-90 degrees. For push-pull: pull straight out firmly. If the mechanism is stuck, the internal latch may be damaged — replace the entire head assembly.
Machine doesn't stop when e-stop is pressed
Critical safety issue. Immediately lock out the machine. Check wiring — NC contacts must be in series with the safety relay. Verify the safety relay is functioning. A broken wire in an NC circuit should cause a stop, so check for a wiring bypass.
Safety relay faults after e-stop reset
The safety relay detects a cross-fault between the two monitoring channels. Check that both NC contacts on the e-stop are switching simultaneously. One contact may be welded closed — replace the contact block.
De unde cumpărați
Interval de preț
$39.87 — $39.87
la 1 distribuitori
Specificații rapide
- Device class
- command switch
- Enriched by
- eao-decoder-2026-08-12
- Lead time
- 0 Days
- Manufacturer series
- Series 51
- Mouser part number
- 123-51-259.0250
