In modern industrial automation, safety isn’t a feature—it’s a requirement. The Schneider Electric Harmony XB4 Emergency Stop Pushbutton stands as one of the most trusted components for machine safety systems. Engineered with precision, durability, and compliance in mind, this emergency stop pushbutton ensures operators can immediately halt operations when needed, protecting both personnel and equipment.
The Harmony XB4 Emergency Stop Pushbutton (model ZB4BS844) combines ergonomic design and rugged performance. With its 40mm red mushroom head, mechanical latching system, and turn-to-release action, it delivers intuitive emergency actuation and long-term reliability across demanding environments.
Why Choose the Schneider Electric Harmony XB4 Emergency Stop Pushbutton
The Schneider Electric Harmony XB4 Emergency Stop Pushbutton is more than just a red button. It’s the final safeguard in industrial control panels—designed to work flawlessly when it matters most. This emergency stop actuator head is built for endurance, efficiency, and safety compliance across industrial standards.
Exceptional Build Quality
Constructed with a chromium-plated metal bezel and a 40mm unmarked red mushroom head, the Harmony XB4 Emergency Stop Pushbutton offers unmatched toughness. It is rated IP66 for dust and water protection, making it ideal for harsh environments like manufacturing lines, petrochemical plants, or outdoor installations.
With a mechanical durability of up to 300,000 cycles, it is engineered for longevity. The robust design ensures consistent performance even under vibration, shock, or temperature extremes ranging from -40°C to +70°C.
Certified Safety and Compliance
The Schneider Electric Harmony XB4 Emergency Stop Pushbutton complies with key safety standards including IEC/EN 60947‑5‑5 and ISO 13850, ensuring it meets global industrial safety requirements. The unit carries UL, CSA, and CE certifications and is recognized by marine authorities such as BV, DNV, Lloyd’s, and RINA.
Such certifications confirm the pushbutton’s ability to operate dependably under the most challenging industrial conditions.
Technical Specifications of Schneider Electric Harmony XB4 Emergency Stop Pushbutton
Understanding the technical details helps users appreciate the Harmony XB4 Emergency Stop Pushbutton’s engineering excellence. Each specification reinforces its role in ensuring machine and operator safety.
|
Feature |
Specification |
|
Series |
Harmony XB4 (22mm panel mount) |
|
Model |
ZB4BS844 |
|
Head Type |
40mm red mushroom (unmarked) |
|
Action Type |
Mechanical latching, turn-to-release |
|
Bezel Material |
Chromium-plated metal |
|
Mounting Hole Size |
22.5mm nominal |
|
Ingress Protection |
IP66 / NEMA 4, 4X, 12, 13 |
|
Impact Resistance |
IK06 |
|
Operating Temperature |
-40°C to +70°C |
|
Mechanical Durability |
300,000 operations |
|
Standards Compliance |
IEC/EN 60947-5-5, ISO 13850, UL 508, CSA C22.2 No.14 |
Every aspect of the Schneider Electric Harmony XB4 Emergency Stop Pushbutton is optimized for safety performance. From its secure mechanical interlock system to its vibration-tested structure, this component guarantees reliable actuation in critical scenarios.
Installation and Mounting Instructions
The Harmony XB4 Emergency Stop Pushbutton is designed for straightforward installation. Whether retrofitting an existing panel or setting up new equipment, its 22.5mm mounting system allows seamless integration.
Step-by-step Installation Guide:
- Panel Preparation – Drill a 22.3mm (+0.0/-0.4mm) panel hole. Ensure proper tolerance alignment.
- Insert the Head – Position the ZB4BS844 pushbutton head from the front side of the panel.
- Secure with Collar – From the rear, thread and tighten the metal fixing collar (~0.6 N·m torque). Avoid overtightening.
- Attach Contact Block – Snap on compatible ZB4BZ-series contact blocks until a firm click is heard.
- Wiring Connections – Connect wires using screw-clamp terminals. Ensure labeling for clarity.
- Testing – Verify push, latch, and release functions before powering equipment.
Proper installation guarantees that the Schneider Electric Harmony XB4 Emergency Stop Pushbutton functions flawlessly as the last line of defense against accidental or emergency situations.
Compatible Accessories for the Harmony XB4 Series
The modular design of the Harmony XB4 Emergency Stop Pushbutton allows customization through compatible accessories. This flexibility ensures adaptability across various control configurations.
Contact Blocks
- ZB4BZ101: 1NO contact block
- ZB4BZ102: 1NC contact block
- ZB4BZ105: Combination 1NO + 2NC
These contact blocks provide reliable electrical connections for control circuits, accommodating multiple configurations up to four contact blocks per head.
Fixing Collars and Adapters
- The included metal collar ensures secure panel mounting.
- Optional ZBZ01 adapters and ZB4BZ079 collars support PCB mounting setups.
Legend Plates and Illumination Rings
Enhance operator visibility and identification with Harmony series legend plates or LED illumination rings for low-light environments.
Compliance and Certifications
Safety and quality are embedded in the Schneider Electric Harmony XB4 Emergency Stop Pushbutton. It complies with:
- IEC/EN 60947-5-5 and EN/ISO 13850 standards for emergency stop devices.
- UL 508 and CSA C22.2 No.14 for North American safety compliance.
- Marine approvals: BV, DNV, Lloyd’s Register, RINA, and GL.
Its IP66 and NEMA 4X ratings make it suitable for washdown, outdoor, and industrial-grade environments. The pushbutton also meets IEC 60068 vibration (5g, 2–500Hz) and shock (30–50g) resistance standards, confirming robustness under continuous operation.
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Final Thoughts: Safety You Can Trust
When it comes to industrial safety, the Schneider Electric Harmony XB4 Emergency Stop Pushbutton represents reliability, quality, and precision engineering. Whether used on production floors, processing facilities, or automated lines, it ensures quick, reliable emergency actuation every time.
Its combination of rugged design, modular flexibility, and compliance with global standards makes it an essential choice for industrial designers and maintenance engineers.
For more information or to explore compatible models and accessories, visit the Harmony XB4 product collection page and discover how this emergency stop pushbutton can enhance your system’s safety and performance.
