Specifications

Sierra Pacific Innovations Corp 1.3.2
M1-D User’s Guide 13
3.3 Electrical Connections
The M1-D operates on 12VDC power typical of most vehicles.
The M1-D is a negative ground system so verify that your
vehicle outputs the correct voltage and polarity. The M1-D
outputs standard NTSC video signal and responds to
commands via 2 wire RS/485 serial interface utilizizing the
Pelco-D protocol at 2400bps. Electrical connections should
always be performed by qualified personel in accordance with
local and federal codes.
Electrical Steps
1. Review Electrical Connections Overview Diagram (Fig.
1.6)
2. Route main system cable into protected area.
3. Connect the pigtail cable extender (Fig. 1.5) to 12VDC
power. The included pigtail cable extender utilizes a
phono plug type connector and includes a cigarette
lighter adapter. For more permanent installation this
connector can be cut off and hard wired to the vehicle.
OBSERVE POLARITY OR SYSTEM DAMAGE WILL
OCCUR. CONSULT A QUALIFIED ELECTRICIAN.
4. Connect the RS/485 cables to the appropriate port of
your controller. The RS485 leads are red and black in
color. The red wire is RS485 + and the black wire is
RS485 -.
5. Connect the BNC video plug to a suitable NTSC video
monitor.
6. Connect the pigtail cable extender to the main system
cable. The unit will power on when this connection is
made.
There is no ON/OFF switch on the M1-D main system cable.
The system is powered off by removing power from the cable or
disconnecting the M1-D pigtail cable extender from the main
cable. To install a dash mounted or other power switch make
your connection or relay in line with the 12VDC power
connections after the pigtail cable extender.