Bosch Appliances Home Security System DS422I User Manual

Installation Instructions  
DS422i and DS426i Dual Beam Photoelectric  
Intrusion Detection Systems  
Wire Entrance  
Response  
Adjustment  
Power LED  
GOOD LEVEL ALARM  
POWER  
Alignment  
Voltage  
Jacks  
1.0 Specifications  
ACTIVE INFRARED SENSOR  
ACTIVE INFRARED SENSOR  
Range:  
Indoors  
Outdoors  
Vertical  
Fine Tuning  
Screw  
DS422i  
DS426i  
300 ft. (90 m)  
600 ft. (180 m)  
100 ft. (30 m)  
200 ft. (60 m)  
Dimensions (HxWxD): 6.75 in. x 3.25 in. x 3.5 in.  
Alignment  
Tool  
171 mm x 82 mm x 87 mm  
Voltage:  
Current:  
12 to 28 VDC. Non-Polarized.  
Note:  
Tool  
may be in  
any of four  
positions  
Transmitter  
15 mA  
Receiver  
25 mA  
DS422i  
DS426i  
30 mA  
25 mA  
Optical Module  
Cover Screws  
Standby:  
Relay:  
Intended for connection to DC power  
supplies capable of supplying power if  
primary power fails.  
Receiver  
Transmitter  
Alarm activated Form “C” with dry  
contacts rated at 0.5 amps max. @  
30 VAC and DC.  
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).  
Tamper:  
Normally Closed with cover in place.  
NOTE: Be sure all wiring is unpowered before routing.  
Pointability:  
The optical module can be adjusted  
±90° horizontally or ±24° vertically.  
• Route wiring (for wire size see Section 4.0) through the transmitter’s  
wire entrance, leaving enough to properly wire the transmitter.  
Temperature:  
-13°F to +130°F (-25°C to +55°C).  
• Mount the transmitter to the mounting surface. Firmly tighten the  
screws.  
Trigger Response Time:50 to 700 milliseconds, selectable.  
• Repeat this complete mounting procedure for the receiver. Be sure  
to mount the receiver in direct line-of-sight with the transmitter.  
2.0 Installation Considerations  
• Stay within the listed maximum range.  
3.2 Pole Mounting  
• 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.  
NOTE: The recommended mounting height is 3 feet (1 m). However,  
mounting height will change depending on the anticipated  
intruder catch area.  
• 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.  
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.  
• Do not install the units where they may be immersed in water or  
subject to corrosive liquids or sprays.  
• Remove the transmitter’s cover by loosening the Cover Screw (see  
Figure A).  
• 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.  
• 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.  
• Do not install the receivers where sunlight could be reflected directly  
into the receiver optics.  
Wiring Entrance  
• Do not install either unit on movable surfaces or surfaces subject to  
strong vibrations.  
3.0 Mounting  
U-clamp  
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.  
Figure B - Pole assembly  
• 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).  
 
7.1 Alarm response time  
The system’s sensitivity to alarms is manually adjusted by the  
RESPONSE TIME Control on the receiver (see Figure L1 and Table  
L2).  
Receiver's Line-of-Sight  
Response Time  
Control  
3
4
2
-
+
1
5
Transmitted Beam  
RESPONSE  
TIME  
LEVEL  
R
ECE  
I
VER  
Transmitted Beam strength is  
strongest along this path  
Transmitted Beam weakens  
farther from its center  
Figure L1 - Response Time Control  
RESPONSE  
TIME (ms)  
RESPONSE  
SPEED  
CATCH  
EXAMPLE  
Figure H - Beam Strength Area  
• Set the meter to read 3 to 5 VDC.  
SETTING  
1
2
3
4
5
50±25%  
210±25%  
380±25%  
540±25%  
700±25%  
23 ft./s (7 m/s)  
4 ft./s (1.2 m/s)  
2.3 ft./s (0.7 m/s)  
1.6 ft./s (0.5 m/s)  
1 ft./s (0.3 m/s)  
running  
jogging  
• Fine peak the transmitter. Connect the meter to the receiver’s test  
terminals (see Figure J).  
3
4
2
quick walk  
walking  
-
+
1
5
RESPONSE  
TIME  
LEVEL  
R
ECE  
IV  
ER  
slow walk  
Table L2 - Response Settings  
NOTE: Observe the Polarity  
A setting near 1 will alarm if a person runs through the beam while a  
setting near 5 will alarm for objects moving very slowly through the  
beam. The setting should be adjusted lower where birds, debris,  
etc., may interrupt the beam path. Be careful not to adjust the setting  
too low, or it will not trigger an alarm.  
due to DC voltage.  
NOTE: In order to comply with the requirements in UL 639, Intrusion  
Detection Units, an object passing through the beams at a  
speed of 8.8 feet per second (2.7 m/s) must trigger an alarm.  
Figure J - Meter connection  
• Rotate the transmitter’s optical module very slightly to the right and  
left until a maximum meter reading has been achieved. If you cannot  
obtain a reading greater than 2.3 VDC, the Transmitter and Receiver  
must be realigned using the procedure in section 5.0.  
• Walk through the beams after the desired setting has been chosen.  
Be sure the system alarms at the desired pace.  
• Walk through the beams in several locations between the units  
(see Figure M).  
NOTE: To aid in fine-tuning the system, the red LEVEL LED gets  
brighter as the units get fine-tuned and the green GOOD  
LED will be on when the meter readings reach a peak.  
• The system should alarm  
during each crossing of the  
beam. If not, re-check  
alignment or trigger  
• Adjust the transmitter’s Vertical Fine Tuning screw slightly until  
maximum meter readings have again been achieved.  
response time.  
• With the transmitter’s optical module fine-tuned, repeat this exact  
process with the receiver.  
Figure M - Walk testing the  
• Replace the covers.  
system  
NOTE: If a tamper circuit  
7.0 Final Check  
has been installed, it should be tested now by lifting up the  
appropriate covers.  
• Completely block the upper beam on the transmitter. Neither the  
ALARM LED nor the LEVEL LED should come on. If either does  
come on, the beams are incorrectly aligned (see Figure K) and  
should be re-aligned.  
• Secure the covers by tightening each cover mounting screw.  
8.0 Other Information  
8.1 Alignment Lights  
Alignment may be made easier by using a flashing high intensity  
light placed in front of the units. This makes a very distinct target  
when looking at the other unit through the viewing port. A  
recommended light source is model AL402.  
8.2 Maintenance  
At least once a year the front covers should be cleaned. Use a clean  
cloth and a common window cleaner.  
On a daily basis, the end user should walk through the beams before  
arming. This will verify operation.  
Figure K - Mis-aligned beams  
• Completely block the lower beam of the transmitter. Again, neither  
the ALARM LED nor the LEVEL LED should come on.  
• If necessary, re-align and fine-tune each unit.  
DS422i/426i Installation Instructions  
© 2004 Bosch Security Systems  
Page 3  
 
9.2 Perimeter Protection  
9.0 Application Tips  
When protecting the interior of an installation, a good technique is to  
mount the units at 90° angles around the coverage area (see Figure  
R).  
When using photoelectric detectors for motion detection, there are a  
few installation techniques that will make the system more versatile.  
9.1 Beam Stacking  
R4  
T2  
Beam stacking gives a wall  
of protection by stacking  
several units at different  
T1  
R1  
R1  
T1  
heights and providing an  
alarm activation on the  
blockage of only one pair of  
beams (see Figure N for the  
correct set-up technique).  
Note that the system is  
installed with alternating  
transmitters and receivers at  
each end. This eliminates the  
possibility of a receiver being  
covered by more than one  
transmitter.  
S
T2  
R2  
D
Figure N - Beam stack method  
R3  
T3  
The maximum spacing between receivers (S) can be calculated by  
dividing the distance between the transmitter and its receivers (D) by  
20.  
R2  
T4  
Figure R- Perimeter protection  
Therefore, if the distance between a transmitter and receiver is 100  
ft. (30 m), the maximum spacing between receivers would be 100 ft.  
(30 m) ÷ 20, or 5 ft. (1.5 m)  
Note that the beams are mounted so they cross each other. This way,  
an intruder can not enter the area by walking between the units.  
When installing multiple transmitters and receivers, test with all the  
receivers powered-up, but with only one transmitter powered-up at a  
time. A transmitter should set up only its receiver.  
S = D/20 S = 100 ft. (30 m)/20 S = 5 ft. (1.5 m)  
A potential problem when installing systems in a beam stack is “Near  
Field Reflection.” Near field reflection is caused when a reflective  
object is placed in the line-of-sight of the detectors and causes the  
transmitted signal to be reflected to the wrong receiver (see Figure  
P).  
Receivers physically too close to a different system’s transmitters  
may be set up even if the transmitter is not pointed at them (see  
Figure T).  
R1  
T1  
Figure T - Close proximity field problem  
If a receiver is being set up by the wrong transmitter, the signals can  
usually be eliminated by masking the sides of the transmitter and  
receiver. Use electrician’s tape or duct tape inside each enclosure’s  
window.  
T2  
R2  
When installing these systems, remember that the infrared signal may  
reflect off objects (e.g. glossy walls or floors) in the coverage area and  
still set up the receiver.  
Figure P - Near field reflection  
It may be desirable to have more than two sets of beams to create  
taller stacks. This can be accomplished by adding receivers as shown  
in Figure Q). Note that the beam from each transmitter is covering  
two receivers.  
A thorough walk test performed at several different points within the  
coverage area will catch this problem. Re-aligning the units should  
solve this problem.  
The only way to insure proper continual protection is to perform  
regular walk tests of the desired coverage area.  
T1  
R3  
R4  
R1  
R2  
T2  
Figure Q - Multi-system stack  
© 2004 Bosch Security Systems  
130 Perinton Parkway, Fairport, New York, USA 14450-9199  
Customer Service: (800) 289-0096; Technical Support: (888) 886-6189  
03/04  
DS422i/DS426i Installation Instructions  
P/N: 44974D Page 4  
 

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