Visonic DISC Installation Instructions

DISC DISC
DISC DISC
Ceiling Mount PIR Detector
1 1 1 1 . INTRODUCTION . INTRODUCTION . INTRODUCTION . INTRODUCTION
The DISC is the smallest 360
detector presently marketed.
The DISC provides a nearly conical pattern of maximum 10.5 m
(36 ft) diameter, when installed on a 3.6 m (12ft) ceiling.
False alarms caused by environmental disturbances are virtually
eliminated with alternate polarity pulse counter signal processin g
and a low-noise pyroelectric detector.
2 2 2 2 . SPECIFICATIONS . SPECIFICATIONS . SPECIFICATIONS . SPECIFICATIONS
OPTICAL
Detection Pattern: A virtually conical pattern of maximum 10.5 m
(36 ft) diameter, when installed on a 3.6 m (12ft) ceiling.
COVERAGE PATTERNS
The DISC pattern is nearly conical (viewed from detector to the
floor). See Figure 1.
The maximum mounting height is 3.6m (12 ft). The coverage
pattern at floor level is as per the following table:
Mounting Pulse
Height (m) Count 1
2.4 7.3 m diam.
3 9 m diam.
3.6 10.8 m diam.
ELECTRICAL
Voltage: 9 to 15.5VDC.
Current: I5mA at 12 VDC (21 mA max.).
Relay Output: Normally closed (fail-safe) contacts. 18 ohm
resistor in series with contacts. Rating - 0.1A resistive/24VDC.
Alarm Period: 2-7 seconds
Tamper Contacts: Normally closed. Rating - 0.5A resistive/
24VDC.
LED: Walk Test enabled or disabled with internal link.
Detector: Dual-element low-noise pyroelectric detector.
Pulse Counter: Two position selector, 1 or 2 pulses with
alternate polarity signal processing.
3 3 3 3 . INSTALLATION . INSTALLATION
. INSTALLATION . INSTALLATION
3.1 Mounting
The DISC is installed on the ceiling.
The maximum installation height is 3.6m (12 ft).
A. Mount the unit so that the expected motion of an intruder is
perpendicular to the detector and not into the detector.
Be sure to install the detector on a stable ceiling, to avoid
vibrations.
Note: Passive infrared detectors are sensitive to changes in
infrared energy caused by an object moving across the unit's
field of view.
Detection of changes in infrared energy depends on the
amount of infrared energy transmitted by the moving object,
and the temperature difference between the object and the
background. Because of this the PIR may fail to respond
under certain temperature and background conditions, in
which the temperature difference is too small.
B. The DISC is extremely immune to air turbulence and RFl
interference.
DE1111
°
ceiling mounted passive infrared
Pulse
Count 2
6 m diam.
7.3 m diam.
9 m diam.
Installation Instructions
MOUNTING
Ceiling Mounting: Maximum mounting height 3.6 m (12 ft)
ENVIRONMENTAL
Operating Temperature: -10
°
Storage Temperature: -20
PHYSICAL
Dimensions (diam. x H) : 86 x 24 mm (3-3/8 x 15/16 in).
Weight: 64 grams (2 oz)
Color: White.
Figure 1 - DISC PIR Coverage Pattern
However, to minimize possible false
alarms, it is highly recommended
that you avoid aiming the detector at
heaters, sources of light, or windows
subjected to direct sunlight. Avoid
mounting the DISC in locations
where air drafts could flow from the
ceiling or from close walls.
Also avoid running wiring close to
high power electrical cables.
C. Hold the unit base as shown in
Figure 2. Rotate the cover counter
clockwise until it stops. Separate the
cover from the base.
Note: If the cover does not separate easily from the base,
insert a 1/8" screwdriver between a tab (on the cover) and a
slot (on the base). Lower the screwdriver handle until the base
separates from the cover and removes easily.
° ° ° °
C to 49 C (14 F to 120 F).
° ° °
C to 60 C ( -4 F to 140 F).
Figure 2 - Removing
the Cover
1