Grounding Of Twisted Pair Cable; Termination; Grounding - Mitsubishi Electric MELSEC-F FX3U-J1939 User Manual

FX -J1939 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 J1939 network requires terminating resistors for both network ends. When FX
end, connect the included terminating resistor (120  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  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
J1939 equipment
Independent grounding
Best condition
• The grounding point should be close to the FX
possible.
Other FX - Other
3U
J1939 equipment
Shared grounding
Good condition
Shielded twisted pair cable
Shield
Refer to FX
Refer to FX
Refer to FX
Refer to FX
Refer to MELSEC iQ-F FX5U User's Manual (Hardware)
Refer to MELSEC iQ-F FX5UC User's Manual (Hardware)
FX - Other
3U
J1939 equipment
Shared grounding
Not allowed
-J1939, and all grounding wires should be as short as
3U
4 Wiring
4.3 Grounding
-J1939 is the network
3U
Hardware Edition
3G
Hardware Edition
3GC
Hardware Edition
3U
Hardware Edition
3UC
31
1
2
3
4
5
6
7
8
9
10