Installation Instructions
DS422i and DS426i Dual Beam Photoelectric
Intrusion Detection Systems
1.0 Specifications
• Range: Indoors Outdoors
DS422i 300 ft. (90 m) 100 ft. (30 m)
DS426i 600 ft. (180 m) 200 ft. (60 m)
• Dimensions (HxWxD): 6.75 in. x 3.25 in. x 3.5 in.
171 mm x 82 mm x 87 mm
• Voltage: 12 to 28 VDC. Non-Polarized.
• Current: Transmitter Receiver
DS422i 15 mA 25 mA
DS426i 30 mA 25 mA
• Standby: Intended for connection to DC power
supplies capable of supplying power if
primary power fails.
• Relay: Alarm activated Form “C” with dry
contacts rated at 0.5 amps max. @
30 VAC and DC.
• Tamper: Normally Closed with cover in place.
• Pointability: The optical module can be adjusted
±90° horizontally or ±24° vertically.
• Temperature: -13°F to +130°F (-25°C to +55°C).
• Trigger Response Time:50 to 700 milliseconds, selectable.
2.0 Installation Considerations
• Stay within the listed maximum range.
• Install the system with a clear line-of-sight between the transmitter
and receiver. If installed outdoors, make sure trees, weeds, plants,
etc. will not interfere with the beams.
• Use care when installing near reflective surfaces (i.e. glossy walls
or floors). Care should be taken during alignment to ensure beams
are line-of-sight aimed and are not reflecting off surfaces.
• Do not install the units where they may be immersed in water or
subject to corrosive liquids or sprays.
• Do not install the receivers where they will be facing an intense
source of light (e.g. a rising or setting sun). If the sun can not be
avoided, mount the receiver slightly higher than the transmitter. Aim
the receiver down at the transmitter.
• Do not install the receivers where sunlight could be reflected directly
into the receiver optics.
• Do not install either unit on movable surfaces or surfaces subject to
strong vibrations.
3.0 Mounting
3.1 Surface Mounting
NOTE: The recommended mounting height is 3 feet (1 m). However,
mounting height will change depending on the anticipated
intruder catch area.
• Choose the appropriate mounting locations. They should be rigid
and provide a clear line-of-sight between the transmitter and receiver.
• Remove the transmitter’s cover by loosening the cover mounting
screw (see Figure A).
Wire Entrance
ACTIVE INFRARED SENSOR
LEVEL ALARMGOOD
Receiver
ACTIVE INFRARED SENSOR
POWER
Response
Adjustment
Alignment
Voltage
Jacks
Vertical
Fine Tuning
Screw
Optical Module
Alignment
Tool
Transmitter
Cover Screws
Note:
Tool
may be in
any of four
positions
Power LED
Figure A - Location of the system’s major items.
• Place the provided template onto the mounting surface and mark
the holes for its two mounting screws (supplied).
NOTE: Be sure all wiring is unpowered before routing.
• Route wiring (for wire size see Section 4.0) through the transmitter’s
wire entrance, leaving enough to properly wire the transmitter.
• Mount the transmitter to the mounting surface. Firmly tighten the
screws.
• Repeat this complete mounting procedure for the receiver. Be sure
to mount the receiver in direct line-of-sight with the transmitter.
3.2 Pole Mounting
NOTE: The recommended mounting height is 3 feet (1 m). However,
mounting height will change depending on the anticipated
intruder catch area.
NOTE: Use optional MB series poles or equivalent.
• Choose the appropriate mounting location. Install the poles with a
clear line-of-sight between the transmitter and receiver.
• Remove the transmitter’s cover by loosening the Cover Screw (see
Figure A).
• Firmly attach a mounting plate and U-clamp to the pole (see Figure
B) with the screws supplied. Make sure they are line-of-sight aimed
so the transmitter and receiver will be aligned.
U-clamp
Wiring Entrance
Figure B - Pole assembly
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