Sdc - Security Door Controls 702D Key Switch Momentary Nc

Product Description

The SDC - SECURITY DOOR CONTROLS 702D is a momentary-action key switch with a normally closed (NC) output configuration. Key switches of this type serve as access control input devices, allowing an authorized user with the correct key to trigger a momentary contact signal that can release an electric lock, actuate a door controller, or interface with an access control panel. The 702D is finished in a 606 satin brass tone, making it suitable for installations where hardware finish matching is required. This device is typically installed by security integrators, electricians, or access control technicians working on commercial or light industrial door hardware projects.

The 702D is suited for commercial door access control applications where a keyed momentary input is required. Typical installation scenarios include single-door electric strike or magnetic lock release circuits, vestibule entry control, and secured egress points. The momentary NC configuration means the switch output is closed at rest and opens briefly upon key actuation, which is a common wiring requirement for certain access control panels and door release systems. It is sold as a single unit.

Key Features

• Momentary-action operation provides a brief contact pulse on key actuation
• Normally closed (NC) output for compatibility with NC-input access control circuits
• 606 satin brass finish for architectural hardware coordination
• Single-unit packaging suitable for individual door installations

Compatibility

Designed as an OEM-style key switch for commercial access control and door hardware systems requiring a momentary NC keyed input device.

Installation Notes

Installation is typically performed by a licensed electrician or credentialed access control technician. De-energize the access control panel and any associated electric door hardware before wiring. Follow NEC low-voltage wiring guidelines for control circuit connections. Verify that the NC momentary contact configuration matches the panel input requirement before completing the installation.