Alarm Controls MCK-2 MCK Series 1.75" Mortise Cylinder Key Switch, SPDT Momentary, Green LED

Improve access control and on-site security with the Alarm Controls by ASSA ABLOY MCK-2 mortise cylinder key switch. Designed for facility managers and integrators, this keyswitch delivers tamper‑resistant, momentary control that simplifies secure door operation and reduces nuisance alarms. The MCK-2 accepts standard 1-1/8" mortise cylinders for quick retrofit installations and features SPDT momentary switching with contacts rated at 4A @ 28VDC to reliably interface with alarm, access control and monitoring systems. A bright green LED operates on 12 or 24 VAC/DC to give technicians and security staff clear visual status for surveillance and system diagnostics. Constructed with a stainless-steel plate and supplied with tamper and slotted-head screws, the MCK-2 stands up to everyday use in commercial and institutional environments. Backed by a lifetime limited warranty from Alarm Controls by ASSA ABLOY, this keyswitch is a practical choice for security integrators seeking dependable, low-voltage control hardware. Add the MCK-2 to your access control or security monitoring setup to streamline operation and strengthen site protection.

• Secure, tamper‑resistant momentary control for doors and gates, reducing unauthorized access and false alarms
• Accepts standard 1-1/8" mortise cylinders for fast integration with existing hardware
• Bright green LED (12/24 VAC/DC) provides immediate visual feedback for monitoring and surveillance
• SPDT momentary action with 4A @ 28VDC contacts supports common access control and alarm panels
• Heavy-duty stainless steel plate and included tamper/slotted screws minimize vandalism and service calls