Installation
STACK Digital Video Recorder
8
Users Guide
Connect a camera to the CAM plug on the Input Harness. If your
camera doesn’t have its own power supply, semi-reg12v
power can be taken from the two 2.1mm power plugs adjacent to the
BNC. The power plugs supply 12 volts or the supply voltage -2
volts, whichever is smallest, up to a maximum of 0.5 amps. If the
current required is greater than 0.5A, you must provide a separate
power supply.
As standard the composite (NTSC or PAL) input is active. If your
camera has a S-video connector, you will need to use the optional S-
video harness and then re-configure the DVR as described on
page 22.
Connect the Record Switch to the SW connector.
Connect a permanent DC supply of between 6.5 and 20 volts to the
Power (B+ and B-) connector. As a guide, the system draws
approximately 2.5 watts when recording. The current drawn will
increase as the voltage supplied becomes lower (eg 210 mA approx.
at 12 Volts, 390 mA approx. at 6.5 volts.) and with whatever other
equipment is connected using the two 2.1 power plugs. Whilst the
DVR is protected internally from over-voltage, you should provide a
3 amp fuse in the B+ connection to protect against short circuits in
your own wiring.
Important:
Whilst the DVR will operate over a wide voltage range,
most cameras will only operate with power supplies of around 12
volts. Please check with your camera supplier.
A permanent power supply is required to ensure that recording
finishes cleanly when the Record Switch is turned off. If the supply
is obtained from a switched supply, eg, one controlled by a vehicle’s
ignition switch, the DVR could switch off before the recording has
finished, see page 15.
The following connections are optional:
