MEITRACK MD533S MDVR User Guide
Copyright © 2020 Meitrack Group All rights reserved. - 11 -
Note: The audio output port of the CVBS display is the same as that of the handset.
2.5.4
Camera Interface
The device is equipped with two 4-pin AV input ports (5557 interface), which are connected to 5 V cameras.
The following figure shows the interfaces of AV-IN1 and AV-IN2:
2.5.5
I/O Port
1
Power input
(+)
3
SOS
5
ACC
7
Input 3
9
Input 4
11
Output 2
13
CANH
2
GND input
(-)
4
GND output
(-)
6
Analog input
1
8
Analog input
2
10
Output 1
12
Digital temperature
sensor
14
CANL
Pin Number
Cable Color
Description
1 (Power +)
Red
Positive charge of the power input, connected to the positive charge of the
vehicle battery. Input voltage: 11–36 V. 12 V is recommended.
2 (GND)
Black
Ground wire. Connect to the negative charge of the vehicle battery or to the
negative terminal.
3 (SOS)
White
Digital input 1. Negative trigger (SOS button by default)
4 (GND output)
Black
Ground wire, connected to input 1 (SOS button)
5 (ACC)
White &
brown
Digital input 2. Positive trigger
Connect to the vehicle ACC cable by default to detect the vehicle ACC status.
6 (Analog input 1)
Blue
Analog input 1 with 12-bit resolution. Valid voltage: 0–6.6 V
Connect to an external sensor, such as the fuel level sensor.
7 (Input 3)
White & red
Digital input 3. Positive trigger by default. It can be switched to negative
trigger.
Connect to a door trigger signal cable to detect vehicle door status.
