Line Termination - Pro-face GP3000 Series Installation Manual

CANopen cable arrangement
The CANopen interface uses DSUB 9-pin plug connector. The plug is assigned with the
CAN_H, CAN_L and CAN_GND connections. CAN_H and CAN_L are two physically
different bus levels. CAN_GND is the common reference potential.
Node 1
Diagram 1
LT
LT = Line Termination
Diagram 1
D-sub 9 pin (socket)
Pin
2
GP
3
7
Shell
• The cable's resistance value should be 70mΩ./m or less.
• The above diagrams shows the case used the cable connector "XM2D-0901" by OMRON Co.

Line termination

To minimize the signal's reflections from the end of the cable, a line termination shall be placed
close to the 2 ends of the bus. Connect both ends of the twisted pair cable(CAN_H and CAN_L)
to each LT. Use line termination whose resistance value is 120 Ω. (Resistance Tolerance: 5%
maximum, Rated Power: 1/4 W minimum)
Node 2
Signal
name
CAN-L
CAN-GND
CAN-H
FG
Termination
Resistance
Diagram 2
CAN_H
CAN_L
CAN_GND
Diagram 2
Shield
GP
4
Node n
Twisted Pair Cable
D-sub 9 pin (socket)
Signal
Pin
name
2 CAN-L
CAN-GND
3
CAN-H
7
Shell FG
LT
Shield
Shield