Mitsubishi Electric CANopen ME3CAN1-L, User Manual

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Wiring Setup and Procedures before Operation
MELSEC-L Series – CANopen Module ME3CAN1-L 6 – 5
Ground the communication cable as follows:
●
The grounding resistance should be 100 or less.
●
The grounding point should be close to the ME3CAN1-L. Keep the grounding wires as short as
possible.
●
Independent grounding should be performed for best results. When independent grounding is
not performed, perform "shared grounding" of the following figure.
Termination
The CAN network must be terminated at both ends by a 120 termination resistor between the wires
CAN_L and CAN_H. It is recommended to use a CAN bus connector with built-in bus terminator.
b
WARNING:
For safety, always check the potential differences between the grounding points. If potential
differences are found, proper measures must be taken to avoid damages.
Fig. 6-3: Grounding of the CAN bus cable
Fig. 4-4: Grounding of the ME3CAN1-L
For noise prevention please attach at least 35mm of the shield from the twisted-
pair CAN bus cable to the grounding with a shielding connection clamp.
Grounded mounting plate or grounded DIN rail with
a grounding resistance of 100 or less (Class D).
Power
supply
CPU
MELSEC-L series PLC
ME3CAN1-L
CAN bus cable
Independent grounding
Best condition
ME3CAN1-L
Other
equipment
ME3CAN1-L
Other
equipment
ME3CAN1-L
Other
equipment
Shared grounding
Good condition
Common grounding
Not allowed