Alarm Controls MCK-5-4 MCK Series Mortise Cylinder Key Switch Station, DPDT Alternate, Single Gang, Green LED

Secure, dependable access control for critical entry points — the Alarm Controls by ASSA ABLOY MCK-5-4 mortise cylinder key switch station delivers tamper-resistant, professional-grade operation for security, surveillance and monitoring systems. Built for installers and facility managers, this single-gang keyswitch uses a DPDT alternate action to provide latching on/off control that's ideal for doors, gates, alarm panels and restricted-area overrides. The stainless steel wall plate accepts a standard 1-1/8" mortise cylinder (sold separately: CY-1, CY-1A) for a clean, durable finish. With switch contacts rated at 4A @ 28VDC and an integrated green LED that runs on 12 or 24 VAC/DC, the MCK-5-4 provides clear status indication and reliable low-voltage performance in access control and monitoring applications. Tamper-proof screws and optional weather-resistant cover ensure secure installations in high-use or semi-exposed environments. Choose the MCK-5-4 to add a secure, easy-to-install keyswitch to your security or surveillance project — contact your distributor or add to your next access control system order.

• Durable stainless-steel faceplate accepts standard 1-1/8" mortise cylinders for long-lasting, vandal-resistant installation
• DPDT alternate switch provides reliable latching control for doors, gates and alarm circuits
• Integrated green LED (12/24 VAC/DC) gives clear visual status for monitoring and surveillance panels
• Tamper-proof and slotted-head screws included for secure, code-compliant mounting
• 4A contact rating at 28VDC supports common low-voltage access control and security devices