MEITRACK T633G User Guide
Copyright © 2019 Meitrack Group All rights reserved. - 14 -
1 (Power +)
Red
Positive charge of the power input, connected to the positive charge
of the vehicle battery. Input voltage: 11.4–36 V.
2 (GND)
Black
Ground wire, connected to the negative charge of the vehicle
battery or to the negative terminal.
3 (Input 1)
White
Digital input 1, negative trigger (SOS button by default)
4 (GND)
Black
Ground wire, connected to input 1 (SOS button)
5 (Input 2)
White &
brown
Digital input 2 (negative trigger)
Connect to a door trigger signal cable to detect vehicle door status.
(Most Chinese, Korean, and Japanese cars are negative edge-
triggered.)
The port can be set to positive trigger, AD input 3 (0–30 V), or output
5.
6 (Output 3)
Yellow
& red
Output 3
Valid: low level (0 V)
Invalid: open collector
Maximum voltage for output open collector (invalid): 40 V
Maximum current for output low voltage (valid): 500 mA
Connect to an external relay to remotely cut off the vehicle fuel
cable or engine power supply.
The port can be set to positive or negative input 6.
7 (Input 3)
White &
red
Digital input 3 (positive trigger)
Connect to the vehicle ACC cable by default to detect the vehicle
ACC status.
The port can be set to negative trigger, AD input 6 (0–30 V), output
6.
8 (AD Input 1)
Blue
Analog input 1 with 12-bit resolution and valid voltage 0–30 V
Connect to an external sensor, such as the fuel level sensor.
The port can be set to positive or negative input 4 or output 7.
9 (Fuel level sensor input)
Blue &
brown
Analog input 2 with 12-bit resolution and valid voltage 0–30 V
There is a white plug on the AD cable, and the cable is connected to
the A53 fuel level sensor by default.
The port can be set to positive or negative input 5 or output 8.
10 (Output 1)
Yellow
Output 1
Valid: low level (0 V)
Invalid: open collector
Maximum voltage for output open collector (invalid): 40 V
Maximum current for output low voltage (valid): 400 mA
Connect to an external relay to remotely cut off the vehicle fuel
cable or engine power supply.
The port can be set to positive or negative input 7.
11 (Output 2)
Yellow
&
brown
Output 2
Valid: low level (0 V)
Invalid: open collector
