Rev. A.1, 10/99

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TYPE 4 FAIL SECURE

This is the same as Type 3 except that 2 remote switches are used. An example would be an entry card reader and an exit push button. The SPDT contacts of each remote switch are connected in NC series as shown so that the use of either switch cuts power to the status switch common extinguishing the green indicator. The NO contacts are connected in parallel so that either switch releases the lock. Any number of remote switches may be connected in this way. Note that many remote switches such as card readers, digital keypads or Securitron's Touch Sense Bar require power. They should receive constant power with their contacts left dry to connect as shown in the Type 4 drawing. Power is most easily furnished from the associated “+” terminal for the zone. See section 4.4 for an example of powering a switching device at the door.

4.4 POWERED SWITCHING DEVICES AT THE DOORS

The wiring methods shown in Figures 3 and 4 do not specifically show operation with a powered switching device at the door such as a card reader or digital keypad. This is to keep the drawings simple and also recognizes the fact that powered devices such as card readers will often get their power separately and only their output relay will be part of the LCP wiring scheme. When, however, the powered switching device receives its power from the same supply that operates the LCP, the most convenient way to supply power to the device is from the power terminals on the LCP board (as is pointed out in the previous sections). Figure 5 shows an example of a powered switching device mounted at the door. It includes Securitron’s model DK-26 digital entry keypad and an “S” Senstat Magnalock which is a fail safe electric lock. Note that for clarity, we have not shown a switching exit device such as Securitron’s Touch Sense Bar being used to release the lock from the inside but you must always be concerned to adhere to all building codes as regards egress safety.

FIG. 5: POWERED SWITCHING DEVICE AT DOOR WIRING (DK-26 + MAGNALOCK)

LCP

S

 

BOARD

L

 

E

 

 

F

 

 

DC IN

 

 

 

 

+

/OUT

 

NOTE: "+" TERMINAL

ON LCP BOARD WILL

BE +1, +2, +3 OR +4

DEPENDING ON ZONE

DK-26 CPU

WHITE

RED

NC1 C1 NO1

"S" SENSTAT MAGNALOCK

BLACK

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Assa ELECTRIC LOCK manual Type 4 Fail Secure, Powered Switching Device AT Door Wiring DK-26 + Magnalock

ELECTRIC LOCK specifications

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