Assa Model 34, 32 manual Double Door Control Switching, Emergency Release

Rev. A.5, 8/03 Page- 17

3.7 DOUBLE DOOR CONTROL SWITCHING

It’s common to control two locks from a single access and/or exit switch on double doors or on an installation where two locks are mounted on a single door. In nearly all cases, this works with no problem but occasionally the release can appear to be “sticky” for similar reasons to those discussed in Section 3.3 This happens when one of the locks is poorly coupled to its strike plate. This could occur because of an installation problem (the strike plate is not being allowed to swivel) or because of some obstruction between the plate and magnet surface. When an electromagnet is not well coupled to its strike plate, its magnetic field collapses so rapidly that it provides some energy to recirculate in the second magnetic lock, slowing the release of that lock.

FIG. 17: DOUBLE POLE SWITCHING OF TWO LOCK INSTALLATION

	TWO POLE
	SWITCH	RED MAGNALOCK #1	BLK
+
		RED	BLK
POWER		MAGNALOCK #2

SUPPLY

So if you notice slow release on a double lock installation, this is telling you that one of the locks is not holding properly and that the problem should be corrected. Alternately, any chance of slow release can be eliminated by controlling the two locks with a double pole switch or relay. This blocks the recirculation path and is shown in Figure 17.

3.8 EMERGENCY RELEASE

Magnalocks are often wired into a system such that they can be released in an emergency -- either manually from one switch or automatically, often from the fire alarm system. It is the user's responsibility to accomplish this hookup correctly according to these instructions and good electrical practices. In general, we recommend that a switch or relay be used to perform a series break of all DC power which is the simple and sure way to make sure the doors do release. Securitron power supplies have terminals for interconnection of such emergency release switches. Finally please note that it is the responsibility of the end user and dealer/installer to insure that Magnalock installations comply with any applicable fire or

building codes.