Chapter 3
13
CAREU U1 Vehicle Tracker User Guide
Pin# Signal Name
Description
I/O
Electrical Characteristic
8
Output 3
Open-Collector
Output 3
O
Imax = 300mA
9
CAN H
CAN High
I
VI = 2.75V ~ 4.5V
10
CAN L
CAN Low
I
VI = 0.5V ~ 2.25V
3. Serial Connector
Pin# Signal Name
Description
IO
Electrical Characteristic
1
Vout 1
Supply voltage output O Vo = +5V (Vout 1~3 Total Imax =
500mA)
2
GND
Signal ground
----
3
TX1
RS232 Data output
O
4
RX1
RS232 Data input
I
5
Vout 2
Supply voltage output O
6
GND
Signal ground
----
7
TX2
RS232 Data output
O
8
RX2
RS232 Data input
I
9
Vout 3
1-Wire
Supply voltage output
1-Wire Data input
O
I (Optional)
10
GND
1-Wire_GND
Signal ground
1-Wire ground
----
----
11
TX3
RS232 Data output
O
12
RX3
RS232 Data input
I
13
SPK+
Audio output
O
14
SPK-
Audio output
O
15
MIC+
Microphone Input
I
16
MIC-
Microphone Input
I
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