Inovance H5U Series - RS485 Serial Connection

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4.5 CANopen/CANlink Bus Connection
When building a CAN network, connect each of the three cables leading out from
each device to the corresponding cable of the adjacent device. Add a 120 Ω CAN
bus termination resistor at both ends of the bus. You can use a DIP switch to
choose whether to activate the H5U series built-in resistor. The following 󶍾gure
shows the CAN bus connection topology.
CGND
120Ω
120Ω
CANH
CANL
CAN bus
Set a termination resistor
using toggles 3 and 4
of the DIP switch
Master station
H5U
Use this switch
to set a termination
resistor at network
termination
Slave station 1 Slave station N
DIP switch DIP switch
Termination
resistor
CANH CANL CGND
CANH CANL CGND CANH CANL CGND
Figure 8 CANopen/CANlink connection
The following table lists the relationship between CANopen transmission rate and
transmission distance.
Baud Rate (bit/s) Maximum Bus Length (m)
1 million 20
500,000 90
250,000 150
125,000 300
50,000 1,000
To prevent interference with communication signals, do not bundle the CAN bus
with the AC power cable and high-voltage cables.