Visonic K-940 Installation Instructions

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Temperature-Compensated Pet-Immune PIR Detector

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The K-940 is an advanced pet immune PIR detector, that utilizes
TSI™ (Target Specific Imaging) technology, ensuring immunity to
pets weighing up to 18 kg (40 lb).
The detector is also notable for its high stability, enhanced RFI
protection (greater than 30 V/m), high-temperature compensation
for maximum "catch" performance and unique low-temperature
compensation for optimum false-alarm rejection.
The pyroelectric sensor of the K-940 is enclosed in a sealed
chamber, protected from insects and air drafts. The pulse counter
may be switched between 1 and 3 pulses, as desired.
Besides regular wall and corner mounting, 3 optional swivel
brackets are available for increased versatility of installation.
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OPTICAL
Max. Coverage Range: 9 x 9 m (30 x 30 ft) / 90°.
Pet Immunity: Immune to animals weighing up to 18 kg (40 lb).
Vertical Adjustment: 3-position adjustment scale: 1.8 m (6 ft),
2.1 m (7 ft) and 2.4 m (8 ft).
ELECTRICAL
Voltage: 9 to 16 VDC.
Current: 17 mA at 12 VDC, 21 mA at 16 VDC
Alarm Output: Normally closed (fail-safe) contacts. 18 ohm
resistor in series with contacts. Rating - 0.1 A resistive / 30 VDC.
Tamper Output: Normally closed, rated 0.5 A resistive / 30 VDC.
Alarm Period: 2-3 seconds.
Pulse Counter: 2 position selector, 1 or 3 pulse operation.
LED: Walk test enabled or disabled with internal link.
Detector: Dual-element low noise pyroelectric sensor.
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The K-940 can be surface mounted on a wall or in a corner.
Always mount the unit on a firm and stable surface. For optional
swivel brackets, see Para. 3.2 and Figure 3.
A. Select the mounting location so that the expected motion of an
intruder would cross the detector's coverage pattern.
B. Mount the unit at the height of 1.8 m (6 ft) to 2.4 m (8 ft).
Important! The detector is immune to 18 kg
(40 lb) animals moving on the floor or
climbing on furniture as long as the activity
takes place below 1 m (3 ft). Above the 1 m
(3 ft) height limit, the detector is immune to
9 kg (20 lb) pets, but the pet immunity will
decrease as the pet gets closer to the detector. It is therefore
recommended to select a mounting location that minimizes
potential close proximity of animals.
C. It is advisable to avoid aiming the detector at heaters, sources
of light or windows subjected to direct sunlight. Also avoid
running wiring close to high power electrical cables.
D. To remove the front cover, open the screw at the bottom of
the unit. Separate the front cover from the base. A keyhole
shaped slot permits easy removal of the PCB for maintenance
by just loosening the adjustment locking screw.
DE1240
Preliminary
Installation Instructions
Figure 1. General View
MOUNTING
Surface or corner (without brackets).
Mounting Height: 1.8 m (6 ft) to 2.4 m (8 ft)
Optional Mounting Brackets (See Figure 3)
BR-1: Swivel Bracket, adjustable 30° down and 45° left, 45° right.
BR-2: Same as BR-1, with corner adapter.
BR-3: Same as BR-1, with ceiling adapter.
ENVIRONMENTAL
Operating Temperature: -10°C to 50°C (14°F to 122°F).
Storage Temperature: -20°C to 60°C (-4°F to 140°F).
RFI Protection: >30 V/m to 1000 MHz.
PHYSICAL
Size (H X W X D): 104 x 60 x 32 mm (4.1 x 2.4 x 1.3 in.).
Weight: 77 g (2-3/4 oz).
Color: White.
PATENTS
U.S. Patent No. Des. 346,567
E. For surface mounting use the two knockouts at the back of the
base; for corner mounting use the knockouts on the angled
sides. The unit must be fastened firmly to the mounting
surface, to avoid possible vibrations.
Figure 2. Components Layout
1