K&R GT600-4T132G User Manual page 259

●
Use of CANlink bus
The CANlink bus topology is shown as follows:
CANH
CANL
120Ω
terminal
resistor
CANH CANL CGND
Set J2 to match
terminal resistor
MD38CAN1
GT600
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
Run the twisted cable and cable
CANH
CANL
COM
connected to COM closely.
3. Multi-core twisted pair cable (non-shielded)
CANH
CANL
COM
Twist the other unused cables into
one rope and connect it to COM.
●
CANlink Transmission Distance
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
1 25 m
2 95 m
3 560 m
4 1100 m
CANlink bus
COM
CANH CANL CGND
J2
MD38CAN1
GT600
CANH
CANL
COM
2. Twin-core STP cable
4. Multi-core STP cable
CANH
CANL
COM
Twist the other unused cables into
one rope and connect it to COM.
Baud Rate Number of Nodes
1 Mbps 64
500 kbps 64
100 kbps 64
50 kbps 64
8. Peripherals and Options
120Ω
terminal
resistor
CANL CGND
CANH
Set J2 to match
terminal resistor
MD38CAN1
GT600
Connect the shield to COM
Connect the shield to PE.
Cable Diameter
2
0.205 mm
2
0.34 mm
2
0. 5 mm
2
0.75 mm
8
- 257 -