Grounding Of Twisted Pair Cable; Termination; Grounding - Mitsubishi Electric MELSEC-F FX3U-CAN User Manual

FX -CAN User's Manual
3U
4.2.3

Grounding of twisted pair cable

Strip a part of the coating of the shielded twisted pair cable as shown below, and ground at least 35 mm
(1.38") of the exposed shield section.
4.2.4

Termination

®
The CANopen
end, connect the included terminating resistor (120 Ω 1/2W) between pin number 2 (CAN_L) and 4 (CAN_H).
4.3

Grounding

Ground the cables as follows
• The grounding resistance should be 100 Ω or less.
• Independent grounding should be established whenever possible.
Independent grounding should be performed for best results.
When independent grounding is not configured, perform "shared grounding" as shown in the following
figure.
For further information, refer to the respective PLC manual.
FX -
3U
CAN
Independent grounding
Best condition
• The grounding point should be close to the FX
possible.
32
network requires terminating resistors for both network ends. When FX
Other FX -
3U
equipment CAN
Shared grounding
Good condition
Shielded twisted pair cable
Shield
→ Refer to MELSEC iQ-F FX5U User's Manual (Hardware)
→ Refer to MELSEC iQ-F FX5UC User's Manual (Hardware)
Other FX -
3U
equipment CAN
Shared grounding
Not allowed
-CAN, and all grounding wires should be as short as
3U
-CAN is the network
3U
→ Refer to FX
Hardware Edition
3G
→ Refer to FX
Hardware Edition
3GC
→ Refer to FX
Hardware Edition
3U
→ Refer to FX
Hardware Edition
3UC
Other
equipment
4 Wiring
4.3 Grounding