Electrified mortise door locks shall be designed to [release automatically]
[remain secure] in case of power failure. These facility interface devices
shall use dc power to energize the solenoids. The solenoids shall be rated
for continuous duty. Electric mortise locks shall incorporate end-of-line
resistors to facilitate line supervision by the system. If not
incorporated into the electric strike or local controller, metal-oxide
veristors (MOVs) shall be installed to protect the controller from reverse
current surges.
a. Solenoid: The actuating solenoid for the locks furnished shall not
dissipate more than 12 Watts and shall operate on 12 or 24 Volts dc.
The inrush current shall not exceed 1 ampere and the holding current
shall not be greater than 700 milliamperes. The actuating solenoid
shall move from the fully secure to fully open positions in not more
than 500 milliseconds.
b. Signal Switches: The strikes/bolts shall include signal switches to
indicate to the system when the bolt is not engaged or the strike
mechanism is unlocked. The signal switches shall report a forced entry
to the system.
c. Hinge: An electric transfer hinge shall be provided with each lock
in order to get power and monitoring signals from the lockset to the
door frame.
d. Size and Weight: Electric strikes/bolts shall be compatible with
standard door preparations.
e. Mounting Method: The electrified mortise locks shall be suitable
for use with single and double door installations. In double door
installations, the lock would be in the active leaf and the fixed leaf
would be monitored.
2.8.5.6
Electromagnetic Lock
**************************************************************************
NOTE: The designer will specify whether the
electric strike or lock will fail open or secure.
The designer should coordinate this with
requirements of the site safety and fire personnel.
Life safety will be designed in accordance with NFPA
101, Code for Safety to Life from Fire in Buildings
and Structures.
**************************************************************************
Electromagnetic locks shall contain no moving parts and shall depend solely
upon electromagnetism to secure a portal by generating at least 5.3 kN 1200
pounds of holding force. The lock shall interface with the local
processors without external, internal or functional alteration of the local
processor. The electromagnetic lock shall incorporate an end of line
resistor to facilitate line supervision by the system. If not incorporated
into the electromagnetic lock or local controller, metal-oxide veristors
(MOVs) shall be installed to protect the controller from reverse current
surges.
a. Armature: The electromagnetic lock shall contain internal
circuitry to eliminate residual magnetism and inductive kickback. The
actuating armature shall operate on 12 or 24 Volts dc and shall not
SECTION 13720A
Page 79
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