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Rev. A.5, 8/03 Page- 16
installations, the calculation can become quite complex so refer to Appendix B for a more
complete discussion.
Distance Gauge 12V Gauge 24V Distance Gauge 12V Gauge 24V
80 FT 20 GA 24 GA 800 FT 10 GA 16 GA
200 FT 17 GA 22 GA 1500 FT. 8 GA 14 GA
400 FT 14 GA 20 GA 3000 FT N/A 12 GA
3.5 SENSTAT MAGNALOCKS: “SC”
Securitron's optional patented Senstat feature provides true lock status sensing. In many
electrically controlled door security systems, status sensing is provided by a magnetic switch on
the door itself. This indicates the door is closed but not necessarily secured. Securitron's
Senstat monitors the lock rather than the door and therefore provides higher security (but note
that it can’t be used as an auto-relock input to an access control system).
An “SC” Magnalock provides a dry SPDT output which changes state when the lock is reporting
secure
(1 Amp @ 30 VDC maximum). This is accomplished by conducting the input power of
the lock through the strike and employing it to energize an internal SPDT relay. The white wire
is the Senstat relay common. Green is closed to white when the lock is secure and Orange is
closed to white when the lock is not secure.
FIG. 15: “SC” SENSTAT WIRING
RED
BLK
GREEN
WHITE
POWER
SUPPLY
+
WHITE AND GREEN WIRES PROVIDE ISOLATED CLOSURE WHEN LOCK IS SECURE.
ORANGE AND WHITE ARE CLOSED WHEN LOCK IS NOT SECURE (AS SHOWN ABOVE).
"SC" LOCK
ORANGE
3.6 DOUBLE DOOR PROCEDURE FOR STATUS REPORTING
Often two Magnalocks are mounted on a double door and are turned on and off together (no
separate control). As to status reporting, it is of course possible to receive a separate Senstat
status signal from each door or you can
combine the outputs so that if both locks are secure,
the double door is secure and if either lock is not secure, the double door is not secure.
Simply tie the white and green wires together from the two locks. A circuit will be closed
between the other white and green wires only when both locks are reporting secure. If either is
not secure, the circuit between other white and green wires will be open. The orange wires are
not used. See Figure 16.
FIG. 16: DOUBLE DOOR WIRING WITH "SC" LOCKS
WHITE
GREEN
WHITE
"SC" LOCK
"SC" LOCKS ARE INTERWIRED AS SHOWN TO PROVIDE STATUS MONITORING. AN ISOLATED CLOSURE
WILL EXIST BETWEEN THE GREEN AND WHITE WIRES ONLY IF BOTH LOCKS ARE SECURE.
"SC" LOCK
GREEN