Grounding - Mitsubishi Electric FX5 User Manual
Melsec iq-f series
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Also See for FX5:
- Programming manual (1112 pages) ,
- User manual (958 pages) ,
- Reference manual (44 pages)
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■FR-A5NR
• When one inverter is connected
Built-in RS-485 port
FX5-485-BD
FX5-485ADP
RDA
RDB
SDA
SDB
0.3 mm
SG
PLC
• When multiple (up to 16) inverters are connected
Built-in RS-485 port
FX5-485-BD
FX5-485ADP
RDA
RDB
SDA
SDB
0.3 mm
SG
PLC
Grounding
Grounding should be performed as stated below.
• Perform Class-D grounding. (grounding resistance: 100 or less)
• Independent grounding should be performed for best results.
When independent grounding cannot be performed, perform "shared grounding" as shown in the following figure.
For details, refer to the following.
FX5U User's manual (Hardware)
FX5UC User's manual (Hardware)
Other
PLC
equipment
Independent grounding
(Best condition)
• The grounding wire size should be AWG 14 (2 mm
• The grounding point should be close to the PLC, and all grounding wires should be as short as possible.
Set the termination resistor selector
switch to "110 ".
Twisted pair cable
2
(0.3 mm
or more)
Connect the termination resistor connection piece.
2
or more
S
S
R
R
R
S
D
D
D
D
D
G
A
B
A
B
R
FR-A5NR
Inverter
Set the termination resistor selector
switch to "110 ".
Twisted pair cable
(0.3 mm
2
or more
Class-D
grounding
S
S
R
R
R
S
S
S
D
D
D
D
D
D
G
G
A
B
A
B
R
A
FR-A5NR
FR-A5NR
Inverter
Inverter
For the pin arrangement in the connector, refer to case of one
inverter for the connection diagram.
Other
PLC
PLC
equipment
Shared grounding
Common grounding
(Good condition)
(Not allowed)
2
) or larger.
Terminal
array
Terminal
block Screw
size: (M3)
SDA SDB RDA RDB RDR SG
Terminal
symbol
Connect them to the serial
port of the PLC.
2
Connect a termination
or more)
resistor connection piece
to the most distant
inverter.
Class-D
grounding
S
R
R
R
S
S
R
R
R
S
D
D
D
D
D
D
D
D
D
G
B
A
B
R
A
B
A
B
R
FR-A5NR
Inverter
Other
equipment
A
B
C
4 INVERTER COMMUNICATION
4.5 Wiring
4
89
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