DVM-500Plus Installation Guide 002-0501-02 REV C
Page 16
Wiring Connections Chart
Input Signal
Color
AWG
Description
Notes
+12V Power
16
+12VDC Un-switched Power
REQUIRED
. Digital Ally
recommends connecting
directly to the engine
compartment battery. Do NOT
connect through a charge
guard or battery saver system.
Ground
16
Ground
REQUIRED
. Digital Ally
recommends connecting
directly to the engine
compartment battery
Ignition
18
+12VDC Switched
REQUIRED
. +12V power only
when ignition is in the ACC or
On position. When ignition is
turned off, the unit Can be set
to do a controlled shutdown
automatically based on a user
selectable time setting. This
connection also necessary to
charge the I/O box internal
backup battery.
Emergency Lights
18
Emergency Light interface. +12V
when lights are activated
Connect to Light Bar
Controller
Siren
18
Connect directly to one side of
siren speaker. Or, connect one
yellow wire to siren controller if it
o12VDC when siren is ON.
Siren
18
Connect directly to other side of
siren speaker. Or, connect other
yellow wire to ground if the siren
controller o12VDC when
siren is ON.
Brake
18
Brake interface. +12V signal when
brakes are activated
Connect to brake pedal switch
or 3rd brake light
Speed
18
Vehicle speed sensor for
speedometer interface. (VSS)
Speed sensor that outputs X
number of pulses per mile.
Left Turn Signal
18
Left turn signal input. +12V signal
when turn signal is activated
Right Turn Signal
18
Right turn signal input. +12V signal
when turn signal is activated
Reverse
18
Reverse input. Signal grounded
when vehicle goes into reverse
