programmed in the Relay Hold time. The location of the alarm
output connector is seen in Figure 1. The state of the relay
when there is no alarm can be selected as N/C or N/O so that
power loss will indicate either an alarm or no alarm. For more
information, consult the Relay Contact Section of this manual
under Alarm Setup.
Some equipment may require a dry contact closure (normally
open). Connect such equipment to the N/O and common leads.
For a normally closed alarm, connect between the N/C and
common leads. There is no polarity; these leads may be
swapped around. Other equipment may require a closure to
ground. In this case, a ground connection will be provided on
such equipment. Connect the common lead to ground and N/O
lead to the input of the equipment. There is no voltage on the
alarm connectors of the VMD1001. No damage can be done
by incorrect wiring.
For installation guidelines, consult the Relay Contact Section
of this manual under Alarm Setup.
Connecting the Power
The VMD1001 operates from a DC supply range from 8V to
15VDC. The power input connector, a standard 2.1mm power
jack, must have positive (+) on the center and negative (-) or
ground, on the outer shell. The unit is reverse protected and
correct polarity is indicated by the green Power LED being lit
on the front panel.
For mobile operation, a negative ground system is required,
unless the video ground is isolated from the automobile chas-
sis ground. If operated in a vehicle, make sure the power sup-
plied to the VMD1001 is properly filtered so alternator, radio or
other equipment does not generated noise that might effect
the motion detection performance. The unit may be operated
off of a regular 110 or 220 VAC household supply using a trans-
former to supply the required 8-15VDC power.
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