Section II. DESCRIPTION AND DATA
with multiple mounting surfaces that permit orientation
1-8. Purpose and Use.
of the coverage pattern centerline at 0° 20° 45° and
90° from the surface. Mounting hole locations are
The processor is used in conjunction with the
marked on each of the multiple mounting surfaces of the
transceiver (fig. 1-1) for detecting moving objects within
enclosure for securing purposes. The unit obtains its
a prescribed confined area. Detection is accomplished
power from the processor. Connection to this unit is
made by way of one screw type terminal strip enclosed
transmitted and received ultrasonic signal, caused by
within the steel case. Entrance to the unit during
moving objects within the detectable area.
installation, interconnection, and for maintenance
processor may be operated with one to twenty
purposes is provided by a cover secured to the box by
transceivers. A single transceiver will detect movement
four number 4 x ½ inch long slotted screws. The unit is
within an area of 25 by 35 feet (ceiling heights of 8 to 12
protected with a tamper switch which is normally closed
feet). For larger areas, additional transceivers may be
when actuated by fitting the cover in place. During
used to insure positive detection coverage. Detection of
maintenance the tamper plunger may be pulled out to
movement within the coverable area completes an
actuate the switch and complete the circuit. Upon
alarm circuit for signaling purposes at the J-SIIDS
reinstallation of the cover the tamper switch is reset.
1-10. Differences Between Models
1-9. Description of Equipment
This manual covers only one model.
There are no
a. Processor (fig. 1-1). This unit provides the
differences between models.
driving source for the transceiver and processes the
return signals. It is housed in a 16 gauge welded steel
enclosure measuring 10.2 inches wide, 9.7 inches high
1-11. Tabulated Data
and 2.1 inches deep. The enclosure is painted gray and
is marked on the top outer side for two ½ inch conduit
Power required ..............
20 ± 2 Vdc
entrances. Four mounting holes are provided in the rear
of the enclosure for securing purposes. The unit obtains
2.5 ma-each transceiver
its +20 ± 20 Vdc power from the J-SIIDS control unit.
Connections to this unit are made by way of two screw
Alarm circuit ..................
no alarm-less than 2 Kohms
type terminal strips enclosed within the steel case.
Entrance to the unit during installation, interconnections,
alarm-greater than 100 Kohms
and for maintenance purposes is provided by a cover
secured to the box by two 6-32 x 3/8 inch screws. The
unit is protected with a tamper switch which is normally
Operating frequency ......
26.3 kHz ± 130 Hz
closed when actuated by fitting the cover in place.
During maintenance, the tamper switch plunger may be
pulled out to actuate the switch and complete the circuit.
Upon reinstallation of the cover, the tamper switch is
b. Transceiver (fig. 1-1). This unit contains the
transmitting transducer, and a preamplifier and
receiving transducer. A RANGE control (R5) sets the
sensitivity level for a given installation and environment.
These components are housed in a 16 gauge welded
temperature range ....
20° to +150°
30° to +165°
steel enclosure measuring 3.4 inches wide, 17.9 inches
high and 2.2 inches deep. The enclosure is painted gray
20 g, 11
and is marked on the top outer side for two ½ inch
conduit entrances. The enclosure is painted gray and is
marked on the top outer side for two ½ inch conduit
entrances. The welded steel enclosure is constructed