Access control systems installed on egress doors that utilize a sensor-release function must fully conform to the 2020 Minnesota State Fire Code (MSFC) when using an electromagnetic locking device, or other electrified hardware that secures both the access-side and egress-side of the door. The MSFC does not apply to access control systems where the egress-side of the door is always unlocked and allows for free and uninhibited egress.

Here is a general summary of requirements.

Use limitations

• Sensor release systems can be used in any occupancy except Group H (hazardous).

Listing requirements

• The door locking system units shall be listed in accordance with UL 294 – Access Control System Units.

Primary release functions

• Occupant sensor

  • An approved sensor (typically a motion-sensor) must be installed on the egress side, arranged to detect an occupant approaching the door, causing the door to immediately unlock.

• Manual release device

  • A clearly identified and readily accessible manual unlocking device/switch must be located on the egress side of the door. The manual unlocking device must be:
    • Located within 5 feet of the door.
    • Mounted between 40 inches and 48 inches vertically above the floor.
    • Clearly identified by a sign that reads “PUSH TO EXIT.”
  • When operated, the manual unlocking device shall result in direct interruption of power to the electric lock (independent of any other electronics) and the door shall remain unlocked for not less than 30 seconds.