Key Management Systems Ltd
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P a g e
Lock Output
It is critical that all locks are wired intrinsically safe. This means that the access
control system should never be the sole means of releasing the doors.
An emergency over-ride switch can be fitted that disables the power to the lock
regardless of the access control system. The wiring for an emergency over-ride switch
depends on the type of lock being used:
•
A Power-to-lock type requires a push-to-break switch between FROM OVR and
TO OVR. Alternatively, the +12v wire can be wired through the RTE and fire
switch N/C.
•
A Power-to-unlock type requires a push-to-break switch between 0v to 0v to
lock, and the metal link between FROM OVR and TO OVR. This depends on
having power to the system in order to open the door during an emergency.
Note:
The switch must be rated for the current that the lock takes
(i.e. a lock taking 2A requires the switch to also have a 2A rating).
The wiring example below show the lock’s +12v output being broken through the
OVR connections on terminals 6 & 7 (see previous page).
K
M
S
B
U
S
DOOR
RTE
N/C
AUX1
AUX3
AUX2
N/O
COM
OM
RON
G
6
E
-1
34
P
-ST
-US
12
V
D
C
Lo
ck
02200009
1
2
3
4
5
6
7
8
En De
R.T.E
N/C
Fire
switch
N/C
