Bosch Appliances Home Security System DS794Z User Manual

Trouble Output: A solid state open collector shorts to ground (-)  
when the detector is in a trouble condition. Maximum current load  
is 25 mA.  
Installation Instructions  
DS794Z Long Range Passive Infrared  
Intrusion Detector with Self-test  
Trademark names are used throughout this document. In most cases,  
these designations are claimed as trademarks or registered trademarks in  
one or more countries by their respective owners. Rather than placing a  
trademark symbol in every occurrence of a trademark name, Bosch  
Security Systems, Inc. (hereinafter referred to as Bosch) uses the  
names only in an editorial fashion and to the benefit of the trademark  
Temperature: The storage and operating range is -20° to +120°F  
(-29° to +49°C). For UL Listed Requirements, the range is +32° to  
+120°F (0° to +49°C).  
SonalertConnector: Using a Sonalert type sounder (low voltage)  
will provide an audible tone when the unit is in alarm. A sounder is  
intended only as an aid for walk testing during installation.  
owner with no intention of infringing the trademark.  
Reading Bosch Security Systems, Inc. Product Date Codes  
1.0 General Description  
For Product Date Code information, refer to the Bosch Security  
The DS794Z is a high performance intrusion detector designed to  
provide an alarm condition upon the detection of an intruder moving  
into or through its coverage pattern.  
CIRCUIT BOARD RETAINER TAB (2)  
REPLACEABLE  
OPTICAL MODULE  
COVER TAMPER SWITCH  
TAMPER RELAY  
PERMANENT  
RELFECTING MIRROR  
Technology designed into the DS794Z is based on the transmission  
of infrared energy; all objects transmit infrared energy. The warmer an  
object is, the more infrared energy transmitted. The DS794Z detects  
the change in infrared energy that occurs when a target passes  
through its view.  
TO REPLACE OPTICAL MODULE,  
LIFT THIS EDGE UP  
WALK TEST/ALARM  
LED INDICATOR  
The coverage pattern, consisting of sensor fingers (to detect the  
target) is arranged in a side-by-side array. The total number of fingers  
is determined by the optical module used. The fingers are grouped  
by polarity into pairs, with each pair consisting of one zone.  
4
5
6
7
8
BACKGROUND NOISE  
VOLTAGE CONNECTOR  
SETUP SWITCH BANK  
TERMINAL  
STRIP  
(UNDER MIRROR ASSEMBLY)  
To detect motion, the DS794Z must first see a change in infrared  
energy in one finger followed by a change of energy in the remaining  
finger. Therefore, disturbances that occur in only one finger do not  
constitute motion and are ignored.  
SONALERT™ CONNECTOR  
(UNDER MIRROR ASSEMBLY)  
Front view with cover off  
SURFACE WIRE  
ENTRANCE  
The “catch sensitivity” may be changed by the installer to provide a  
degree of sensitivity determined by each installation.  
BRACKET WIRE ENTRANCE  
SURFACE MOUNT  
HOLES (4)  
REAR WIRE  
ENTRANCE  
CORNER MOUNT  
HOLES (4)  
2.0Specifications  
REAR WIRE  
ENTRANCE  
Coverage:  
The DS794Z is shipped with the OA80 80 foot (24.4 m) Mirror installed.  
If a 200 foot (61 m) range is desired, it will be necessary to install the  
OA200 Mirror that is sent along with the unit.  
TAMPER SCREW  
HOLE  
COVER TABS (4)  
TEST/SOUNDER  
CORD SLOT  
Base  
StandardRange:  
Options: OA120-2* Mirror and TC6000 Test Cord.  
Broad (OA80 Mirror): 80 ft. by 50 ft. (24.4 m by 15.3 m)  
Long (OA200 Mirror): 200 ft. by 10 ft. (61.0 m by 3.1 m)  
* Shipped in packages of 2.  
OptionalRange:  
3.0 Mounting  
Long (OA120 Mirror): 120 ft. by 25 ft. (36.6 m by 7.6 m)  
Input Power: 6.0 to 15.0 VDC; 18 mA at 12 VDC.  
Select a location likely to intercept an intruder moving across the  
coverage pattern (review patterns on page 4). The recommended  
mounting height is 7.5 ft. (2.3 m) for the DS794Z with the OA80 or  
OA120 Mirror, or 10 ft. (3.1 m) for the OA200 Mirror. Each mounting  
surface should be solid and vibration free. When mounting, avoid hot  
and cold drafts, heat sources, animals and pets and direct sunlight.  
Do not mount outdoors.  
Standby Power: There is no internal standby battery. Connect to  
DC power sources capable of supplying standby power if primary  
power fails. Eighteen mA-H required for each hour of standby time  
needed. Four hours (72 mA-H minimum) are required for UL Listed  
Requirements.  
• Remove the cover by inserting a thin screwdriver into each of the four  
slots on the cover. Twist gently until the cover snaps free of the tabs  
on the base.  
Sensitivity: Field selectable for Standard, Intermediate, or High.  
Alarm Relay: Silent operating Form “C” relay. Contacts rated 125  
mA, 28 VDC maximum for DC resistive loads. Do not use with  
capacitive or inductive loads.  
Tamper: Normally Closed (with cover in place) tamper switch.  
Contacts rated at 28 VDC, 125 mA maximum.  
 
The supervision features function as follows:  
5.0 Configuration Switch Settings  
The DS794Z has several features that are controlled using the  
configuration switches.  
PIR: TheoperationofthePIRiselectronicallycheckedapproximately  
every 12 hours. If the PIR fails, the Alarm/Test LED will flash 4 times  
and the Trouble Output will activate.  
OFF  
CONFIGURATION  
ON  
SWITCHES  
Motion Monitor Supervision: This feature verifies that the detector  
has a clear view of the detection area. When selected using switches  
S4 and S5, a supervision timer is activated. A trouble condition will  
be indicated if the detector has not alarmed at least once during the  
selected time period (this feature can be disabled by placing both  
switches in the Off position). The time period selected should be  
long enough to allow adequate time for holiday weekends.  
1
2
3
4
5
= LED ON  
= LED OFF  
1 ON  
1 OFF  
= Standard Sensitivity  
2 ON and 3 ON  
2 OFF and 3 ON  
2 ON and 3 OFF  
= Intermediate Sensitivity  
= High Sensitivity  
= 4 Day Motion Monitor  
= 30 Day Motion Monitor  
= Motion Monitor Off  
4 ON and 5 OFF  
4 OFF and 5 ON  
4 OFF and 5 OFF  
Refer to Section 5.0 (Configuration Switch Settings) for proper  
switch settings.  
5.1 LED Operation (S1)  
If the time period selected has elapsed from the last alarm, the LED  
will flash 2 times and the Trouble Output will activate.  
ON: Allows the Alarm/Test LED to operate when activated by  
motion.  
It is recommended that the 30 day timer be selected. This verifies  
that the unit is operational and avoids nuisance trouble conditions  
caused by holidays, vacations, etc.  
OFF: The LED will not operate on alarm activation, but will indicate  
a supervision trouble condition.  
5.2 Sensitivity Mode (S2 and S3)  
Supervision Display Chart  
Sensitivity modes depend on the type of coverage desired and the  
installation environment.  
LED  
ON  
CAUSE  
Unit Alarm  
Flashing 2  
Flashing 4  
Motion Monitor Timeout  
PIR Self-test Failure  
Standard Sensitivity: The recommended setting for the DS794Z  
with the 80 ft. (24.4 m) Mirror installed. Tolerates environment  
extremes on this setting. Not recommended for the 120 ft. (36.6 m)  
and 200 ft. (61 m) coverages.  
7.0 Setup and Walk Testing  
Intermediate Sensitivity: The recommended setting for the 120 ft.  
and 200 ft. (36.6 m and 61 m) coverages or for locations where an  
intruder is expected to cover only a small portion of the protected  
area. Tolerates normal environments on this setting.  
If a different optical module is to be used:  
• Slide the current module free from its housing. Install the new optical  
module onto the housing. Make sure it snaps into place.  
NOTE: Excessive handling of the front mirrored surfaces may lead  
High Sensitivity: The setting for fast response to intruder signals.  
For use in quiet environments where thermal and illumination  
transients are not anticipated.  
to performance degradation.  
• Replace the front cover.  
If both switches are in the Off position, the unit will default to the  
Intermediate setting.  
NOTE: All testing must be performed with the front cover in place.  
• Apply power to the unit.  
NOTE: Although the sensitivity modes provide different degrees of  
tolerance to environmentally caused alarms, the installer  
should assure peak background noise voltage readings do  
not exceed ±0.15 VDC. (See Section 8.0 Final Tests).  
• Wait at least two minutes, after applying power, to start walk tests.  
For best results, wait at least 1 minute between walk tests to allow  
the processing to adjust to the background.  
5.3 Motion Monitor (S4 and S5)  
NOTE: Walk testing should be done across the coverage pattern as  
shown.  
Set switches S4 and S5 for the desired Motion Monitor time (see  
Supervision Features). The detector is shipped with the Motion  
Monitor feature Off.  
• The edge of the coverage pattern is determined when the Alarm/Test  
LED indicator (and optional Sonalert, if installed) first turns on.  
NOTE: The use of a Sonalert type device (sounder) will provide an  
audible tone during the time the unit is in alarm. Of the three  
available connector pins, the center pin is positive (+) with  
respect to either outside pin (outside pins are common (-)).  
6.0 Supervision Features  
The DS794Z performs several supervision features that, combined  
with the advanced motion detection capabilities of the detector,  
provide an extremely high level of security. A supervision trouble  
condition is indicated at the detector by the Alarm/Test LED (see the  
Supervision Display Chart).  
Walk test the unit from all directions to determine the boundaries.  
• After completion of the walk tests, remove the Sonalert (if installed).  
• The LED indicates the cause of the supervision trouble once per  
secondusingcodedpulses.Thesupervisiontroublesignalactivates  
the Trouble Output available on terminal 8.  
DS794Z Installation Instructions  
© 2011 Bosch Security Systems, Inc.  
Page 3  
 
8.0 Final Tests  
10.0 Coverage Patterns  
NOTE: Meter readings are very important in determining back ground  
disturbance levels and catch margin sensitivity.  
TOP VIEW  
0
METERS  
24  
A
30  
20  
10  
0
• Connecta20,000ohm/volt(orgreater)DCVOMtotheNoiseVoltage  
connector pins as shown. Set meter scale for about 3 VDC. Route  
meter wiring through the slot in the base. (Use of the TC6000 is  
recommended, but is not essential for meter use.)  
Mirror to Pattern  
Reference  
K
F
B
I
F
I
J
A
G
C
K
G
H
• The base reference level for reading background noise or target  
voltages is approximately 2.0 VDC. Installations in quiet  
environments, therefore, will result in a steady meter reading  
between 1.9 and 2.1 VDC.  
J
10  
20  
30  
H
D
B
C
D
E
E
0
FEET  
80  
24  
OA80  
Voltage changes greater than 0.75 VDC from the reference level are  
desirable for good catch performance. If changes are less than  
±0.75 VDC, the device may fail to respond at this distance if the  
temperature difference between the intruder and the background is  
very small.  
SIDE VIEW  
METERS  
0
10  
0
A - E  
K
I, J  
F - H  
0
FEET  
80  
OA80 Mirror Coverage  
• Turn on all heating and cooling sources that would normally be in  
operation during times of protection. Stand away from the unit and  
outside the coverage pattern, then monitor the background noise  
for at least three minutes.  
TOP VIEW  
METERS  
36  
0
20  
10  
Mirror to Pattern  
Reference  
A
B
C
DS794Z readings should not deviate from the reference level more  
than ±0.15 VDC. For readings outside these limits; eliminate the  
cause, re-point the unit slightly, or mask off the affected zones.  
D
E
F
I
G
H
I
0
G
C
H
D
E
A
10  
F
20  
0
FEET  
120  
36  
B
9.0 Other Information  
SIDE VIEW  
METERS  
0
10  
9.1 LED Indicator Operation  
7.5  
A-C  
I
G,H  
D-F  
0
120  
0
FEET  
• If viewing the operation of the Alarm/Test LED indicator is not  
desiredaftersetupandwalktestsarecompleted, placeconfiguration  
switch S1 in the Off position.  
OA120  
OA120 Mirror Coverage  
9.2 Sealing the Wire Entrance  
TOP VIEW  
0
METERS  
61  
• The foam plug that is provided with the unit is for sealing the wire  
entrance from drafts and insects.  
5
0
5
0
FEET  
200  
61  
9.3 Maintenance  
SIDE VIEW  
0
METERS  
10  
0
• At least once a year, the range and coverage should be checked  
according to Sections 7.0 and 8.0 (Walk Testing and Final Tests).  
0
FEET  
200  
OA200 Mirror Coverage  
• To ensure continued daily operation, the end user should be  
instructed to daily walk through the far end of the coverage pattern.  
This assures an alarm output prior to arming the system.  
Mirror to Pattern  
Reference  
9.4 Mirror Module Information  
D
• Should the mirror surfaces become soiled or dirty, clean using a soft  
clean cloth and any commonly available mild window cleaner.  
E
C
B
A
9.5 Masking  
• Refer to the mirror module and pattern drawings for masking  
information.  
OA200  
• Before attempting any masking, be sure the chosen mirror surface  
is the correct one. When attempting to remove any masking, many  
adhesives will either destroy the mirror’s surface or leave enough  
residue behind to reduce coverage performance.  
• Shaded areas of the mirror drawings do not affect the pattern and,  
therefore, are not maskable.  
© 2011 Bosch Security Systems, Inc.  
130 Perinton Parkway, Fairport, New York 14450  
3/11  
DS794Z Installation Instructions  
P/N: F01U068930-06 Page 4  
 

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