K&R GT600-4T132G, User Manual

Page: 259 / 362

8. Peripherals and Options
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CANlink bus
CANH
CANL
120
Ω
terminal
resistor
COM
CANH CANL CGND
Set J2 to match
terminal resistor
CANH CANL CGND
J2
MD38CAN1
MD38CAN1
GT600
GT600
120
Ω
terminal
resistor
GT600
CANH CANL CGND
Set J2 to match
terminal resistor
MD38CAN1
CANH
CANL
COM
CANH
CANL
COM
CANH
CANL
COM
●
Use of CANlink bus
The CANlink bus topology is shown as follows:
It is recommended to use an STP cable as the CAN bus and use a twisted cable to
connect CANH and CANL. Connect a matching terminal resistor of 120 Ω respectively
at both ends of the bus to prevent signal reflection. The CAN bus allows connection of
a maximum of 64 nodes and the distance of each node branch must be smaller than
0.3 m. Connect the reference ground of all nodes together.
1. Self-prepared single-core cable 2. Twin-core STP cable
Run the twisted cable and cable
connected to COM closely.
3. Multi-core twisted pair cable (non-shielded) 4. Multi-core STP cable
Twist the other unused cables into
one rope and connect it to COM.
●
CANlink Transmission Distance
Connect the shield to PE.
Twist the other unused cables into
one rope and connect it to COM.
The transmission distance of the CANlink bus is directly related to the baud rate and
communication cable. The relationship between the maximum transmission distance
of the CANlink bus and the baud rate is shown in the following table.
No. Max. Transmission Distance Baud Rate Number of Nodes Cable Diameter
1 25 m 1 Mbps 64 0.205 mm
2
2 95 m 500 kbps 64 0.34 mm
2
3 560 m 100 kbps 64 0. 5 mm
2
4 1100 m 50 kbps 64 0.75 mm
2
8
Connect the shield to COM
CANH
CANL
COM