Rev. A.1, 10/99 | Page- 14 |
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
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
WHITE
RED
NC1 C1 NO1
"S" SENSTAT MAGNALOCK
BLACK
