Chapter 6 Wiring; Grounding - Mitsubishi Electric MELSEC iQ-F Series User Manual

6
WIRING
6.1

Grounding

Perform the following.
• Perform class D grounding (Grounding resistance: 100 Ω or less).
• Ground the PLC independently when possible.
• If the PLC cannot be grounded independently, perform the "Shared grounding" shown below.
Other
PLC
equipment
Independent grounding
(Best condition)
• Bring the grounding point close to the PLC as much as possible so that the ground cable can be shortened.
Grounding of FX5-ENET/IP
(1)
(2)
(1) Ground terminal of CPU module
(2) FG terminal of FX5-ENET/IP
(3) D grounding (Grounding resistance: 100 Ω or less)
Terminal name
FG (Ground terminal)
The connection destination for the FG terminal of FX5-ENET/IP is a spring clamp terminal block.
To connect to the terminal block, there are two ways: by using single wires/strand wires or by using ferrules. Make sure to
properly connect in accordance with the following specifications.
■Ferrule
The following table shows wire ferrules and its associated tools compatible with the terminal block. The shape of the wire
ferrule differs depending on the crimp tool to be used, use the reference product. If the product other than referenced products
is used, the wire ferrule cannot be removed. Sufficiently confirm that the wire ferrule can be removed before use.
<Reference product>
Manufacturer Sleeve
PHOENIX CONTACT GmbH Ferrules with insulation
& Co. KG sleeve
Ferrules without insulation
sleeve
Other
PLC
equipment
Shared grounding Common grounding
(Good condition)
(3)
Ferrules model
AI 0.25-8 YE
AI 0.34-8 TQ
AI 0.5-8 WH
AI 0.75-8 GY
A 0,25-7
A 0,34-7
A 0,5-8
A 0,75-8
AI 1.0-8
AI 1.5-7
Other
PLC
equipment
(Not allowed)
Content
Perform class D grounding. (Grounding resistance: 100 Ω or less)
Suitable wiring size
2
0.25 mm
2
0.3, 0.34 mm
2
0.5 mm
2
0.75 mm
2
0.25 mm
2
0.3, 0.34 mm
2
0.5 mm
2
0.75 mm
2
1.0 mm
2
1.25, 1.5 mm
Crimp tool
CRIMPFOX 6
6 WIRING
45
6.1 Grounding
6