Emergency Push Button with NC | XB4BS8444
Emergency Push Button with NC | XB4BS8444
Blog Article
The XB4BS8444 is a Schneider Electric Emergency Stop (E-Stop) Push Button with a mushroom head and Normally Closed (NC) contacts, designed for industrial safety applications. Here’s a detailed breakdown:
Key Specifications:
Series: Schneider Electric XB4 (Telemecanique brand).
Type: Mushroom-head emergency stop (latching action, requires manual reset).
Contact Configuration:
1NO + 1NC (Normally Open + Normally Closed) – Verify datasheet for XB4BS8444, as some variants may differ.
NC contacts break the circuit when pressed (safety standard compliance).
Electrical Ratings:
Voltage: 250V AC / 300V DC.
Current: 10A (resistive load), 5A (inductive load).
Mechanical Design:
Red mushroom head (Ø40mm), yellow base ring (ISO 13850 compliance).
IP65-rated (dustproof and water-resistant).
Panel-mounted (22mm cutout, M22 threaded bushing).
Safety Standards:
IEC/EN 60947-5-1, ISO 13850 (Emergency Stop function).
CE, UL, cULus certified.
Wiring & Operation:
NC contacts are wired in series with the machine’s control circuit.
When pressed:
NC contacts open (halting machinery).
NO contacts (if present) close (for signaling/feedback).
Manual reset by twisting or pulling the button (depends on variant).
Typical Applications:
Industrial machinery emergency shutdown.
Conveyor systems, CNC machines, presses.
Safety circuits in compliance with PL e / SIL 3 (when used with safety relays).
Compatible Accessories:
Protective cover (XB4AD21) – Flip-up guard.
Mounting adapters (XB4A) – For thicker panels.
Illuminated variants (XB4B) – With LED indicators.
Similar Models:
Siemens 3SB3400-0AA (ATEX-rated).
Omron A165E (22mm, dual NC contacts).
Eaton M22-DL (Stainless steel, high durability).
Installation Notes:
Must be installed in easily accessible locations.
Test functionality regularly per ISO 13850 requirementshttps://store.unigulfsupply.com/product/emergency-push-button-xb4bs8444/