TM 5-6350-264-14&P-5
NAVELEX EE 181-AA-OMI-060/E121 SA-1955
T.O. 31S9-2FSS9-1-5
CHAPTER 2
OPERATING INSTRUCTIONS
Section I. OPERATING PROCEDURES
2-3. EMERGENCY OPERATION.
Operation with
2-1. CONTROLS AND INDICATORS. There are no
operator controls or indicators applicable to this
incomplete surveillance coverage or faulty tamper
circuit should be held to a minimum.
equipment.
2-2. NORMAL OPERATING PROCEDURES. The
BMS is operational after the magnet and switch
assembly are installed, tested, and hooked up to the J-
SIIDS Control Unit.
Section II. THEORY OF OPERATION
During installation, an adjustable biasing magnet is
2-4. FUNCTIONAL DESCRIPTION.
The BMS is
physically positioned within the switch assembly. This
basically a magnetically-operated switch. The BMS is
allows the switch assembly to stay within an inch (2. 5
activated by movement of a permanent magnet, which
cm) of the magnet holder without generating an alarm
moves along with the magnet holder, and provides an
signal and still cause the signal to be activated if the
intrusion alarm to the J-SIIDS Control Unit. Serving as
door or window moves beyond established limits. The
part of J-SIIDS, the BMS is installed on doors, windows,
switch assembly includes a tamper switch that provides
skylights, or like routes of access to secure areas. The
an alarm signal to the Control Unit any time the lid is
magnet holder is mounted on the moving part of the
removed from the switch assembly. Since the reed
access route (door or window itself), while the switch
switch is magnetically activated, no electrical power is
assembly is mounted on the frame so that it is located
required at the BMS installation (fig. 2-1).
between 114 (0. 635) and 1/2 inch (1. 27 cm) from the
magnet holder when the door, window, etc, are closed.
2-1
