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•
If an auxiliary AC generator is installed at the repeater site, the DC backup source MUST be capable of
providing a 40 AH capacity over a period of four (4) hours.
•
If NO auxiliary AC generator is installed at the repeater site, the DC backup source MUST be capable of
providing a 240 AH capacity over a period of twenty-four (24) hours.
Contact a Bosch SAFECOM Applications Engineer for DC power source requirements associated with the
following types of SC720/SC820 Data Repeater configurations:
•
AC is NOT continuously available as the Primary power source.
•
DC is the Primary power source.
•
Transmitter is NOT set for maximum output power (less than 25 watts).
Note:
Ensure the battery bank has sufficient AHr capacity to support all the repeater site equipment
connected to it.
3.1.4
Antenna Location
Numerous effects must be considered when determining the proper location for mounting the SC720/SC820
Data Repeater antennas. The proper antenna location is site specific for each installation. Contact a Bosch
SAFECOM Applications Engineer for recommendations to optimize transmission and reception of RADIO
signals.
3.1.5
Surge Protection
The SC720/SC820 Data Repeater has been tested with the following System Surge Protection Devices:
•
AC Power Line Surge Suppressor:
•
Antenna Lightning Surge Suppressor:
3.1.6
Data Repeater Location
The SC720/SC820 is designed to be installed in an electronics rack provided with a lock or against a vertical
surface using rack-mount brackets. The SC920 may also be installed on a flat horizontal surface resting on
rubber isolation pads inside a locked cabinet. The data repeater should be mounted to allow for easy access to
the connectors on the rear panel by a service technician.
The repeater stations shall be equipped with burglar alarm and automatic fire alarm systems connected to the
central station. The burglar alarm S7 item shall comply with the requirements designated in No. 3 in the
"Standard for Installation and Classification of Mercantile and Bank Burglar Alarm System," UL 681.
Do NOT install the SC720/SC820 in a location subject to moisture, direct sunlight, or near heating equipment.
DO install the SC720/SC820 in a well ventilated location.
The SC720/SC820 is NOT environmentally sealed. Do NOT mount the SC720/SC820 Data Repeater in
a location exposed to the elements.
© 2004 Bosch Security Systems
SC720/SC820 Operation and Installation Guide
Page 11
SC720/SC820
Installation
Poly Phaser #IS-PL-DO-120
Poly Phaser #IS-5OBN-C1-
MA
PoIy Phaser #NEMP-1
90007-201C
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