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Specification & Description
The Schneider XB4BT845EX is a robust and reliable emergency stop push-button designed for critical industrial applications where safety is paramount. This complete unit is part of the Harmony XB4 series and is specifically engineered to meet the stringent requirements of ATEX zones, making it suitable for use in environments with dust hazards.
Crafted with a chromium-plated metal bezel and a Zamak fixing collar, the XB4BT845EX ensures durability and resistance to harsh conditions. The device features a red mushroom head with a diameter of 40mm for quick and easy activation in emergency situations. The push-button operates with a trigger action and mechanical latching for secure engagement and reset is achieved through a push-pull mechanism.
The contact assembly of the XB4BT845EX includes one normally open (NO) and one normally closed (NC) contact, providing flexibility in wiring and control circuit design. The contacts are made from a silver alloy (Ag/Ni) to ensure reliable operation and longevity, with a mechanical durability rated at 300,000 cycles.
Installation is straightforward with a mounting diameter of 22mm and the device can be securely fixed onto a support panel with a thickness ranging from 1 to 6mm. The screw clamp terminals are designed for easy and secure wire connection, accommodating a range of wire sizes and types.
Electrical safety is a key feature of the XB4BT845EX, with a rated insulation voltage of 600V and an impulse withstand voltage of 6kV, ensuring the device can handle the rigours of industrial power systems. It also boasts a high degree of protection with an IP65 rating, safeguarding against dust ingress and water jets from any direction.
The XB4BT845EX is a testament to Schneider's commitment to providing high-quality, safety-focused components for industrial automation and control systems. Its robust construction, reliable operation, and compliance with international standards make it an essential component for ensuring safety in hazardous environments.
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Frequently Asked Questions
What is the function of this emergency stop push-button?
The emergency stop push-button is designed to halt machinery and processes in an emergency situation to prevent harm or damage. It features a red mushroom head for easy identification and activation.
Can this push-button be used in dusty environments?
Yes, this push-button is suitable for use in dusty environments, specifically in zones 21 and 22, making it ideal for a variety of industrial settings.
What are the mounting requirements for this push-button?
The push-button requires a mounting diameter of 22 mm and should be installed on a panel with a thickness between 1 and 6 mm. It is screw-fixed with a recommended tightening torque of 0.8 to 1.2 N.m.
What type of contacts does this push-button have?
The push-button is equipped with 1 Normally Open (NO) and 1 Normally Closed (NC) contact, providing flexibility in wiring and control circuit design.
What is the IP degree of protection for this push-button?
This push-button has an IP65 degree of protection, ensuring it is dust-tight and protected against low-pressure water jets from any direction.
What are the electrical durability and mechanical durability of this push-button?
The push-button has an electrical durability of 1,000,000 cycles for specific AC and DC operations and a mechanical durability of 300,000 cycles, indicating a long service life under normal operating conditions.
Is this push-button compliant with international standards?
Yes, it complies with several international standards, including IEC 60947-5-1 for electrical safety and IEC 60079-0 and EN 60079-31 for equipment intended for use in explosive atmospheres.
What is the rated operational current for this push-button?
The rated operational current varies depending on the voltage and type of operation, with ratings such as 3 A at 240 V for AC-15 and 0.1 A at 600 V for DC-13.
How is the push-button reset after activation?
The push-button is reset using a push-pull method, allowing for quick and easy resetting after activation.
What certifications does this push-button hold?
The push-button is certified by INERIS with the certification number 04ATEX9004U, indicating it has been tested and approved for use in potentially explosive atmospheres.
