Guangcheng Technology GCAN-GT-410 user manual
3. Connection
3.1 Serial Connection
The RS232 and RS485 of the GCAN-GT-410 module use standard serial port
levels, so the module can be directly connected to devices with RS232 or
RS485 interfaces.
3.2 CAN Connection
When GCAN-GT-410 is connected to the CAN bus, it only needs to connect
CAN_H to CAN_H and CAN_L to CAN_L to establish communication.
The CAN-bus network adopts a linear topology, and the two farthest terminals
of the bus need to be installed with 120Ω terminal resistance; if the number of
nodes is greater than 2, the intermediate nodes do not need to install 120Ω
terminal resistance. For branch connections, their length should not exceed 3
meters. The connection of CAN-bus bus is shown in Figure 3.1.
Figure 3.1 CAN bus connection mode
Please note: CAN-bus cable can use ordinary twisted pair and shielded twisted
pair. The theoretical maximum communication distance mainly depends on the
bus baud rate. The relationship between the maximum bus length and the baud
rate is shown in Table 3.1. If the communication distance exceeds 1km, the
cross-sectional area of the line should be greater than Φ1.0mm2. The specific
specifications should be determined according to the distance. The general rule
is to increase the distance as the distance increases.
Baud rate
Communication length
1 Mbit/s
25m
500 kbit/s
100m
250 kbit/s
250m
125 kbit/s
500m
50 kbit/s
1.0km
20 kbit/s
2.5km
