Securitron UNL-24 UNLATCH - Manual (Page 8)

PN# 500-18300
Page 8 Rev. D, 08/11
of the door depends on it receiving constant power. Any time power is cut to the UnLatch,
it will report the door as secure regardless of whether it is latched or not.
The UnLatch uses the information as to whether the door is latched or not for a second purpose.
The UnLatch will not operate unless the latch is in the secure position (the spring latch
plunger is pushed in). The reason for this is to avoid a potential jam condition. If the door had
not fully closed, the spring latch could be adjacent to the dead latch plunger and the dead latch
pin would be resting on the metal “strike” casing of the UnLatch. In this condition, if the
UnLatch was allowed to operate, the dead latch plunger would attempt to push the spring latch
and it would be unable to do so because the dead latch pin would be pushed in by the metal
casing of the UnLatch. The motor would jam. The UnLatch senses any motor jam condition and
shuts itself down for that cycle but it is better not to operate at all unless the door is latched.
Operationally, the door can be opened anyway (it is not latched) so there is no benefit to the
end user from the UnLatch operating unless the door is latched.
5. MAGNACARE
 LIFETIME REPLACEMENT WARRANTY
For warranty information visit: www.securitron.com/en/site/securitron/About/MagnaCare-Warranty/