EMERGENCY PUSH BUTTON XALK188

EMERGENCY PUSH BUTTON XALK188 – Key-Release Industrial Control Station

The EMERGENCY PUSH BUTTON XALK188 (from Schneider Electric’s Harmony XALK range) is a complete surface-mount emergency stop control station engineered to immediately halt machinery during hazardous conditions. Housed in a durable polycarbonate enclosure featuring a light grey base (RAL 7035) and a high-visibility yellow cover (RAL 1021), this complete unit houses a prominent $varnothing 40text{ mm}$ red mushroom-head operator with 1 NC (Normally Closed) slow-break contact block.

Unlike standard push-pull or turn-to-release switches, the EMERGENCY PUSH BUTTON XALK188 incorporates a key-release mechanism (Key No. 455). Once pressed, the contact remains mechanically locked in the safe off state and cannot be reset without inserting the specific key. This key-locking function prevents unauthorized machine restarts after an emergency shutdown, ensuring technician and operator safety during maintenance.

As illustrated in the product image, the station features a surface-mounting design with top and rear knockout entries, housing the red mushroom head and central lock barrel.

Key Features of the EMERGENCY PUSH BUTTON XALK188

Key-Release Reset Mechanism: Provides high operational safety by requiring a physical key (Ronis Key No. 455) to unlock and reset the control station after excitation.
High Ingress Protection (IP66 / IP67 / IP69 / IP69K): Completely protected against dust ingress, high-pressure hose washdowns ( $70text{ bar}$ at $55^circtext{C}$ ), and temporary water immersion.
Positive Opening Function: Built in full compliance with IEC 60947-5-1 Appendix K standards, forcing NC contacts open even in the event of minor contact welding.
Impact & Environmental Resistance: Constructed from UV-stabilized, flame-retardant polycarbonate (IK03 impact rating and NEMA 4X/13 rating) suitable for indoor and outdoor environments.
Flexible Wiring Terminal Connections: Fitted with screw clamp terminal connections handling wires up to $2 times 1.5text{ mm}^2$ with cable ends.

Common Applications and Industrial Usage

The key-reset safety lock, durable housing, and strict industrial compliance of the EMERGENCY PUSH BUTTON XALK188 make it suitable for various automation applications:

Automated Packaging & Material Handling: Mounts directly on conveyers, sorting equipment, and robotic cells to allow quick emergency stops.
Machinery & CNC Workcells: Prevents unauthorized restarting of hazardous cutting tools, stamping presses, or wood-processing machinery during jam clearances.
Food, Beverage & Car Wash Plants: Withstands frequent high-pressure, high-temperature washdowns due to its IP69K rating.
Building Automation & Hoists: Controls emergency cutoffs for commercial garage doors, ventilation extractors, and overhead cranes.

Technical Specifications

The core mechanical, electrical, and physical parameters for the EMERGENCY PUSH BUTTON XALK188 are detailed below:

Parameter Specification	Technical Details & Operational Values
Component Classification	Complete Emergency Stop Control Station
Primary Target Keyword	EMERGENCY PUSH BUTTON XALK188
Manufacturer / Product Range	Schneider Electric / Harmony XALK
Operator Profile / Diameter	Red Mushroom Head / $varnothing 40text{ mm}$
Reset Method / Key Number	Key Release Reset / Key No. 455
Contact Configuration	1 NC (Normally Closed) Slow-Break Contact
Rated Operational Current ( $I_e$ )	$3text{ A}$ at $240text{V AC-15}$ , $6text{ A}$ at $120text{V AC-15}$
Rated Insulation Voltage ( $U_i$ )	$600text{ V}$ (Pollution Degree 3)
Enclosure Material / Color	Polycarbonate / Yellow Cover (RAL 1021), Grey Base (RAL 7035)
IP Protection Rating	IP66 / IP67 / IP69 / IP69K (IEC 60529)
NEMA Protection Rating	NEMA 4X / NEMA 13
Mechanical Durability	$300,000text{ cycles}$
Operating Temperature	$-40^circtext{C to }+70^circtext{C}$
Product Net Weight	Approx. $0.188text{ kg} (188text{ g})$

Operating Guidelines and Safety Practices

SAFETY NOTICE: Emergency stop stations must be tested periodically to confirm proper mechanical tripping and electrical circuit breaking.

Key Management: Maintain key control policies on site. Only authorized maintenance staff or floor supervisors should hold key 455 to unlock the EMERGENCY PUSH BUTTON XALK188 after verifying the emergency condition is resolved.

Cable Entry Preparation: Utilize appropriate ISO M20 or Pg 13.5 IP66/IP69K cable glands on the enclosure knockouts to preserve dust and water protection.

Short-Circuit Protection: Install a $10text{ A}$ cartridge fuse (type gG) upstream to protect internal contacts against heavy short-circuit currents.

To review official international safety standards and IEC specifications for emergency stop devices with mechanical latching function, consult the official IEC 60947-5-5 Electrical Emergency Stop Devices Standard Directory.

To evaluate real-time regional warehouse stock availability or request commercial quotes for bulk procurement needs, please connect with our sales branch via the Control Qatar Contact Page.