Philips VSS2902, Руководство пользователя

Страница: 4 / 4

Operation
A
Different kinds of detectors, with make and break contact (fig. A)
according to choice, can be connected to the alarm input of an alarm
box, such as infrared detectors, magnetic contacts. When an alarm is
detected, the alarm contact in the monitor is activated.
Installation
Warning:
When a camera or accessory is connected or disconnected,
A
the monitor should always be disconnected from the mains
Only operating the
stand-by
key is not sufficient.
When the mains is connected, ail camera lines are scanned.
The monitor uses this to register the camera configuration of the
system and to check whether any modifications have been made.
Cable
A system cable (see specifications) is supplied standardiy.
For an optimum picture and sound quality a standard ‘twisted-pair’
(telephone) be used.
There is an extensive range of plugs and tools available in the hobby
and professional trade to extend the cable. pay attention that
the connection corresponds to figure
Remark: Used system cables
and
connectors are similar to the ones
used for telephone, but may not be interconnected.
The maximum distance that can be bridged (without a cable extension
adapter) between the monitor and the cameras amounts to 200 meters
(150 meters for colour).
Incorporate the box in the desired camera line by means of the
supplied cable, see figure A.
Alarm input
Alarm detectors with a make and/or break contact can be connected to
the alarm input. Connect the detectors to the three-pole screw block.
Remark: When detectors with only a make contact are connected,
points 1 and 2 should always remain connected by means of a wire.
2
3.