Securitron MSS-1C-RT - Manual (Page 2)

PN# 500-17610
Page 2 Rev. A, 03/11
Maximum contact ratings depend on the voltage put through the switch. They are 250 mA
at 12V or less and 125 mA at 24V. In special applications, the switch can accept up to 100V
but the current must be proportionately limited to a maximum 3 watt power rating (60 mA at
50V; 30 mA at 100V).
5. REMOTE TEST OPTION
Units with the remote test option have a six wire cable and include the suffix “RT” in the part
number.
Remote test allows the user to electronically put all the switches into alarm from a
central point. This avoids the awkward procedure of opening all the doors. The fact that each
switch does go into alarm is monitored by the alarm system in this test mode.
The remote test circuit employs three wires. Blue is common and green and orange constitute
two separate test points. By applying +12V to green, you put one of the internal reeds into the
alarm condition. The output of the MSS-1C will then also be in alarm condition. Next, by
applying +12V to orange, you put the second internal reed into the alarm condition and the MSS
should go into alarm once again. If both tests fail to put the MSS into alarm, it is either entirely
defective or (more likely) there is a problem with its wiring to the alarm panel. If one test fails,
the MSS is operating on a single reed as an ordinary magnetic switch and must be replaced.
This test procedure assures full high security operation of the MSS-1C.
Naturally in an actual installation, the switches are tested simultaneously. All blue, green and
orange wires are tied together with like colored wires and connected to a 12V power supply
through two normally open test switches. First one “side” of all switches are tested and then the
second side is tested. You interpret the results as described in the preceding paragraph. Note
that each test point will draw 15 mA for each switch so you need to plan your power supply
capacity by multiplying 15 mA times the number of switches wired together. For example, a 100
switch installation would draw 1.5 Amps during each of the two tests so you should employ a
two Amp supply to have some headroom. Make sure it is a UL listed Class II or Power
Limited power source. Also insure that the normally open test switch contacts are able to
handle the current. Finally, be sure never to perform both tests at the same time or they will be
meaningless and you may overload your power supply. (see diagram below)
MSS-1C #1
12 VDC
POWER
SUPPLY
+
BL
U
E
OR
G
REMOTE TEST WIRING SHOWN WITH THREE MSS-1C SWITCHES. ANY NUMBER OF MSS
SWITCHES CAN BE CONNECTED IN THIS WAY. NOTE THE TWO NORMALLY OPEN TEST
SWITCHES. THEY SHOULD BE CLOSED ONE AT A TIME AND ALL MSS SWITCHES SHOULD
GO INTO ALARM TWICE TO PASS THE TEST.
TEST SWITCHES
C
NO
NO
C
GRN
.
GRN
.
GRN
.
OR
G
OR
G
MSS-1C #2 MSS-1C #3
BL
U
E
BL
U
E
6. MAGNACARE  LIFETIME REPLACEMENT WARRANTY
For warranty information visit www.securitron.com/en/site/securitron/About/MagnaCare-Warranty/
PATENT NOTE: The products discussed in this manual are covered under US patent #5,668,533