CANDTU-400ER
CAN Bus Message Recording and Wireless Data Transmission Equipment User Manual
©2021 Guangzhou ZLG Electronics Technology Co.,Ltd.
9
User Manual
Pin definitions
Table 3.5 Signal definitions
Function
Interface
Signal
Definition
Signal Description
Pin Number
CAN0~CAN3
CAN0_L
CAN0 data transceiver differential inverted
signal
2
CAN0_GND
CAN0 isolated ground
3
、
6
CAN0_H
CAN0 data transceiver differential positive
phase signal
7
CAN_FG
Shielding ground
5
NC
Not connected
1
、
4
、
8
、
9
Table . 8 CAN-Bus interface specifications
Parameter
Minimum
Typical
Value
Maximum
Unit
Communication baud rate
5k
1M
bps
Number of nodes
110
pcs
Dominant level (logic 0)
CANH
2.75
3.5
4.5
V
CANL
0.5
1.5
2
Recessive level (logic 1)
CANH
2
2.5
3
CANL
2
2.5
3
Differential level
Dominant (logic 0)
1.2
2
3.1
Recessive (logic 1)
-0.5
0
0.05
Maximum withstand
voltage of the bus pin
-18
18
Instantaneous voltage of
the bus
-100
+100
Isolation voltage (DC)
3500
V
Figure 3.2 Typical high-speed CAN network connection
The CAN bus adopts balanced transmission. ISO11898-2 stipulates: In the
