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Shenyang Guangcheng Technology Co., Ltd.
USBCAN-OBD
Product data sheet
20 kbit/s
3.3km
10 kbit/s
6.6km
5 kbit/s
13km
Table 3.1 relationship of baud rate and distance
3.3 CAN-Bus terminal resistance
In order to improve the communication reliability and eliminating CAN-bus terminal
reflection, the two furthest terminal need to connect terminal resistance between
CAN_H and CAN_L as shown in figure 3.2. Terminal resistance values determined
by the characteristic impedance of the cables. Such as, the characteristic impedance is
120
Ω
.
Figure 3.2 USBCAN-OBD connect to other CAN devices
Note: USBCAN-OBD adapter has integrated one 120
Ω
terminal resistance,
users can choose whether enable.
3.4 System LED
USBCAN-OBD adapter with one bi-colour PWR indicator to indicate the adapter
status. More functions are shown in table 3.2 and 3.3.
Indicator
Colour
State
SYS
Red/Green
Power, system and data
indicator
Table 3.2 USBCAN-OBD adapter indicator LED
When USBCAN-OBD adapter power on, the indicator will light, indicates the adapter
has power supply, the system is initialized; Otherwise, a system power failure or
system errors has exist.
When CAN-Bus data transceiver, the indicator will blinking.
Indicator
State
Meaning
