XALK178E
ActiveSchneider Harmony XALK Emergency-Stop Station (yellow, red mushroom, XALK178E)
Schneider Harmony XALK single-button control station — enclosed.
Common Applications
Complete control station: green start button in a sealed IP65 enclosure. Mounts on a wall or machine frame. No panel cutout needed. Pre-wired with cable gland. For remote start stations on conveyor lines, pump stations, and loading docks.
Specifications
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Certifications
Third-party safety certifications. UL = required for US NEC installations. CE = EU compliance. CSA = Canadian standards.
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UL, CSA, CE
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Color
Button/actuator color. Green = start/go, Red = stop/emergency, Yellow = caution, Blue = reset (per IEC 60204-1).
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Yellow enclosure, red mushroom head
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Contact Configuration
1NO + 1NC: One circuit closes and one opens when pressed. Common for start buttons that also signal 'running' state.
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NC (emergency-stop) — commonly 1NC; verify count. NOT 1NO
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Function
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Emergency stop (E-STOP)
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IP Rating
IP65: Dust-tight and protected against low-pressure water jets. Suitable for indoor industrial and light washdown.
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IP65
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Material
The bezel/body material. Metal bezels are more durable in harsh environments. Plastic is lighter and cheaper.
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Polycarbonate enclosure
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Mounting Type
How the button attaches to the panel. Panel mount is standard — installs through a cutout from the front.
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Surface mount (enclosed)
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Operator
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1x red Ø40 mushroom-head emergency stop (turn/pull to release), XB5 system
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Pn note
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Corrected: XALK178E = yellow enclosure + red mushroom EMERGENCY STOP station (se.com/Mouser). Was mislabeled green 1-button START station / 1NO. E-stop uses NC contacts.
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Pn status
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mislabel-corrected
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Installation Quick Reference
Panel cutout: 22mm. Insert from the front of the panel, secure with mounting nut from behind (tighten to 2-3 Nm).
Contact block: Snap or screw the contact block onto the rear of the button body. Ensure the contact block orientation matches the wiring diagram — NO terminals are usually marked.
Wiring: Use 0.5-2.5mm² stranded wire with ferrules. Tighten screw terminals to 0.8 Nm. Test the button function before energizing the circuit.
Dimensions
Wiring Diagram
Troubleshooting
Button doesn't respond when pressed
Check the contact block first — it's the most common failure point. Test continuity across the NO or NC terminals with a multimeter. If no click is felt, the return spring in the head may be broken.
Works intermittently
Contact block contacts are pitted or burned. Replace the contact block — don't try to file the contacts. Check if the rated cycle count has been exceeded.
Button feels mushy or doesn't click
The spring return mechanism in the button head is worn. Replace the head. The contact block can usually be reused if it tests OK.
Where to Buy
Price range
$101.76 — $111.86
across 3 distributors
Quick Specs
- Certifications
- UL, CSA, CE
- Color
- Yellow enclosure, red mushroom head
- Contact Configuration
- NC (emergency-stop) — commonly 1NC; verify count. NOT 1NO
- Function
- Emergency stop (E-STOP)
- IP Rating
- IP65
What People Are Saying
“Complete control station: green start button in a sealed IP65 enclosure. Mounts on a wall or machine frame. No panel cutout needed. Pre-wired with cable gland. For remote start stations on conveyor li”
