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 |
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80 FT | 20 GA | 24 GA | 800 FT | 10 GA | 16 GA |
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200 FT | 17 GA | 22 GA | 1500 FT. | 8 GA | 14 GA |
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400 FT | 14 GA | 20 GA | 3000 FT | N/A | 12 GA |
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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
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
ORANGE
BLK "SC" LOCK 
GREEN
POWER |
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SUPPLY | RED | WHITE |
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WHITE AND GREEN WIRES PROVIDE ISOLATED CLOSURE WHEN LOCK IS SECURE. ORANGE AND WHITE ARE CLOSED WHEN LOCK IS NOT SECURE (AS SHOWN ABOVE).
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 "SC" LOCK GREEN
GREEN "SC" LOCK WHITE
"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.