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Chapter 9 Installation and Wiring
9-9
9.2.3 Grounding
(1) This PLC has sufficient protection against noise, so it can be used without grounding except for special much noise. However,
when grounding it should be done conforming to below items
.
(2) Ground the PLC as independently as possible. Class 3 grounding should be used (grounding resistance 80
Ω
or less).
(3) When independent grounding is impossible, use the joint grounding method as shown in the figure below (B).
(A)Independent grounding : Best (B) Joint grounding : Good (C) Joint grounding : Not allowed
(
4) Use 2
㎟
(14AWG) or thicker grounding wire. Grounding point should be as near as possible to the PLC to minimize the
distance of grounding cable.
9.2.4 Cable Specifications for wiring
The specifications for wiring is as follows:
Cable Specifications (
㎟
)
Kinds of external connection
Minimum
Maximum
Digital Input
0.18 (AWG24)
1.5 (AWG16)
Digital Output
0.18 (AWG24)
2.0 (AWG14)
Analog Input / Output
0.18 (AWG24)
1.5 (AWG16)
Communication
0.18 (AWG24)
1.5 (AWG16)
Main power
1.5 (AWG16)
2.5 (AWG12)
Grounding
1.5 (AWG16)
2.5 (AWG12)
•
Be sure to use solderless terminal for power supply and I/O wiring.
•
Be sure to use M3 type as terminal screw.
•
Make sure that terminal screw is connected by 6
∼
9
㎏·㎝
torque..
•
Be sure to use fork shaped terminal screw as shown below.
PLC
Other device
PLC
PLC
Other device
Class 3 grounding
Class 3 grounding
less than 6.2mm
cable solderness terminal (fork shaped)
Other device
Содержание MASTER-K 120S Series
Страница 26: ...Chapter 4 Names of Parts 4 3 2 K7M DRT60U 3 K7M DT60U 4 1 2 40 points main unit Standard 1 K7M DR40U ...
Страница 27: ...Chapter 4 Names of Parts 4 4 2 K7M DRT40U 3 K7M DT40U 4 1 3 30 points main unit Standard 1 K7M DR30U ...
Страница 28: ...Chapter 4 Names of Parts 4 5 2 K7M DRT30U 3 K7M DT30U 4 1 4 20 points main unit Standard 1 K7M DR20U ...
Страница 29: ...Chapter 4 Names of Parts 4 6 2 K7M DRT20U 3 K7M DT20U 4 1 5 30 points main unit Economic 1 K7M DR30UE ...
Страница 138: ...Chapter 7 Usage of Various Functions 7 54 c Program ...
Страница 306: ...Appendix 3 External Dimensions App3 2 2 Slim type G7E DC08A G7E RY08A G7F ADHB G7F DA2V G7F RD2A ...