
Installation Instructions
DS794Z Long Range Passive Infrared
Intrusion Detector with
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
owner with no intention of infringing the trademark.
1.0 General Description
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.
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.
The coverage pattern, consisting of sensor fingers (to detect the target) is arranged in a
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.
The “catch sensitivity” may be changed by the installer to provide a degree of sensitivity determined by each installation.
2.0Specifications
• 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.
Standard Range:
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)
Optional Range:
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.
•Standby Power: There is no internal standby battery. Connect to DC power sources capable of supplying standby power if primary power fails. Eighteen
•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.
•Trouble Output: A solid state open collector shorts to ground
•Temperature: The storage and operating range is
•Sonalert Connector: 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.
•Reading Bosch Security Systems, Inc. Product Date Codes
For Product Date Code information, refer to the Bosch Security Systems, Inc. Web site at: http://www.boschsecurity.com/datecodes/
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| CIRCUIT BOARD RETAINER TAB (2) |
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| COVER TAMPER SWITCH | REPLACEABLE | PERMANENT | |
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| OPTICAL MODULE | |
TAMPER RELAY |
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| RELFECTING MIRROR | |
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| TO REPLACE OPTICAL MODULE, |
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| LIFT THIS EDGE UP |
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| WALK TEST/ALARM |
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| LED INDICATOR |
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| BACKGROUND NOISE | |
TERMINAL | SETUP SWITCH BANK | VOLTAGE CONNECTOR | ||
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STRIP |
| SONALERT™ CONNECTOR | ||
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Front view with cover off
SURFACE WIRE
ENTRANCE
BRACKET WIRE ENTRANCE
SURFACE MOUNT
HOLES (4)
REAR WIRE |
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ENTRANCE |
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| CORNER MOUNT |
| HOLES (4) |
REAR WIRE |
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ENTRANCE |
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TAMPER SCREW | COVER TABS (4) |
HOLE | |
TEST/SOUNDER | |
| CORD SLOT |
Base |
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•Options:
*Shipped in packages of 2.
3.0 Mounting
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.
•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.