247Security Inc. | 4400 North Point Parkway, Suite # 158, Alpharetta, GA 30022, USA | 1-866-693-7492 | www.247securityinc.com
mDVR304
USERS MANUAL
13
2.2.5.
EVENT MARKER CONNECTOR
This connector is used to plug in the included event marker cable.
Pin Number
Signal Description
Pin out
1
DI_0
2
GND
3
+12V OUT
4
Output DO_0
5
Output DO_1
6
Output DO_2
2.2.6.
GPS CONNECTOR (RS232)
The RJ45 port on the back of the DVR is used as an RS232 connection to allow the 304 Series DVR to
collect GPS data with the inside dash mount GPS antenna.
Pin Number
Signal
Description
Pin out
1
TX+
Transmit Data +
2
TX-
Transmit Data -
3
RX+
Receive Data +
4
RX-
Receive Data -
5
NC
Not connected
6
COM
Common
7
COM
Common
8
COM
Common
9
COM
Common
2.3.
CABLE REQUIREMENTS
2.3.1.
POWER CABLE
A 15 ft three wire power cable is included for connection between the DVR and your vehicle power and ignition
signals. It is highly recommended that in-line fast blow fuses (7.5 amps) be installed on the two power input
connections for safety pre-cautions.
Wire Color
Signal
Description
Picture
Red
VIN
Input voltage (8~24VDC)
Black
GND
Ground
White
ON/OFF
Ignition switched power
(only hot when ignition is
in RUN/ACC
