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

Optimize secure entry and system monitoring with the Alarm Controls by ASSA ABLOY MCK-2-2 mortise cylinder key switch. Built for access control, this mortise key switch delivers reliable SPDT alternate switching and a clear green LED status indicator that operates on 12 or 24 volts AC or DC — giving installers and security staff immediate visual feedback for surveillance and monitoring tasks. The stainless-steel faceplate accepts standard 1-1/8" mortise cylinders for quick replacement or upgrades, while the compact 1.25" depth behind the plate makes it ideal for retrofit projects and confined mounting spaces. Rated for 4A at 28VDC, the switch provides consistent performance when integrated with alarm panels, access controllers, or auxiliary control circuits. Tamper-proof and slotted-head screws are included to maintain hardware integrity in commercial and institutional environments. Whether you’re securing a server room, training facility, or retail entry, the MCK-2-2 combines durability and clear status indication to simplify installation and improve day-to-day security operations. Add this rugged Alarm Controls mortise key switch to your access control or surveillance setup today.

• Provides secure, user-friendly access control with an SPDT alternate action for dependable operation in alarm and security systems
• Bright green LED (12/24V AC/DC) offers instant visual status for monitoring and surveillance workflows
• Robust stainless-steel faceplate resists wear at high-traffic entry points and presents a professional finish
• Accepts standard 1-1/8" mortise cylinders for fast retrofits and flexible installation (cylinders sold separately)
• Tamper-proof screws and shallow 1.25" behind-plate depth simplify installation while reducing tampering risk