Securitron Magnalock Corp. www.securitron.com ASSA ABLOY, the global leader
in door opening solutions
© Copyright, 2011, all rights reserved PN# 500-17610
Page 1 Rev. A, 03/11
SECURITRON MODEL MSS-1C-RT MAXIMUM SECURITY SWITCH
REMOTE TEST INSTALLATION & OPERATING INSTRUCTIONS
1. DESCRIPTION
Securitron’s concealed maximum security magnetic switch is intended for 4 7/8” ANSI cut-out
door/frame mortise mounting in critical environments where an attempt to defeat the switch is a
concern. The MSS-1C consists of two pieces: the switch module and the magnet pack.
2. DEFEAT RESISTANCE ISSUES
The MSS-1C is virtually impossible to defeat with a single external magnet. A threat can exist if
an intruder attempted to defeat the switch by obtaining a second MSS magnet pack. The MSS
might be defeated by positioning the second magnet pack near the switch module in a manner
that permits the door to be opened without an alarm being signaled.
The fact that the switch module and magnet pack are mortised into the door frame and door is a
major defense against this threat. This is particularly the case when the door frame is made of
steel as steel will constitute magnetic shielding against an attempt to defeat the switch with a
externally applied second magnet pack. The MSS also includes an extra defense against this.
The product is manufactured in different types. The magnet pack must be of the same type
as the switch module to work. The MSS is delivered as a matched pair with no marking that
identifies its type. Therefore, a person attempting to introduce a second MSS magnet pack in an
attempt to defeat the switch may well have the wrong type pack.
3. PHYSICAL INSTALLATION
The MSS-1C includes a minimum and maximum operating distance. The unit will report
secure only when the separation distance is between this maximum and minimum. If the
magnet pack is too close to the switch module or too far away, the unit will alarm.
The distance between the minimum and maximum separation points is
called the gap. The MSS provides a gap of 4/10”-1/2” (10-
12.5MM). When looked at in terms of actual separation distance,
typical operating range is from 1/10” to 6/10” (2.5MM to 15MM).
The actual separation distance in a mortise mount, however, is
generally controlled by the way in which the door is mounted. It
almost always falls well within the separation distance range of the
MSS-1C but in the event of an unusual door, you may have to shim
the magnet pack or switch module to achieve proper separation. Note
that you can also choose whether to mount the MSS-1C on the
vertical or horizontal section of the door frame as a means to
achieve a reliable separation distance.
When the door is closed, the magnet pack and switch module should
line up with each other as accurately as possible with respect to the
length and width of the respective face plates. Misalignment in either
axis can lead to unreliable operation. NOTE: the arrows on the labels
must align as indicated in the diagram to insure proper switch biasing
and operation.
4. WIRING
The MSS1-C has three wires that are assigned by color as follows:
White = Common
Red = NC
Black = NO
Because we’re using the terms normally open and normally closed, it’s necessary to define what
we mean by “normal”. The normal condition of the MSS is when it is reporting secure
(the magnet pack is at the separation distance from the switch module). So, for example, you’ll
read a closed circuit between White and Black if you meter the switch module in alarm condition
(magnet is not near the switch module) but you’ll read open if you meter it in the secure
condition.
(1 Seiten)
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