Installation and Wiring
FP
Σ
User's Manual
80
6.3.1 Grounding
If necessary, ground the instrument to increase the noise resistance.
NOTE
•
For grounding purposes, use wiring with a minimum of 2mm
2
. The
grounding connection should have a resistance of less than 100
Ω
.
•
The point of grounding should be as close to the PLC as possible. The
ground wire should be as short as possible.
•
If two devices share a single ground point, it may produce an adverse
effect. Always use an exclusive ground for each device.
OK
1
PLC
2
Other device (inverter etc.)
Risk of short circuits
Depending on the surroundings in which the equipment is used, grounding may cause
problems.
Example1:
Since the power supply lines of the FP
Σ
and of the FP0 expansion unit (24V DC and 0V
terminal) are connected to the function earth (PE) through a varistor, the varistor may be
shorted if there is an irregular potential between the power supply line and function earth.
24V DC
PE
0V
Power supply line of FP
Σ
or FP0 expansion unit
Unit type
Varistor
FP
Σ
C32, C28
82V
FP
Σ
C24
56V
FP0 expansion unit
39V
Summary of Contents for AFPG951T34
Page 7: ......
Page 17: ......
Page 18: ...Chapter 1 Safety Measures ...
Page 21: ......
Page 22: ...Chapter 2 Overview ...
Page 32: ...Chapter 3 CPU Types ...
Page 47: ...CPU Types FPΣ User s Manual 30 LD Body ...
Page 51: ...CPU Types FPΣ User s Manual 34 POU Header and LD Body ...
Page 55: ...CPU Types FPΣ User s Manual 38 LD Body ...
Page 57: ......
Page 58: ...Chapter 4 Expansion ...
Page 73: ......
Page 74: ...Chapter 5 I O Allocation ...
Page 81: ......
Page 82: ...Chapter 6 Installation and Wiring ...
Page 115: ......
Page 116: ...Chapter 7 High Speed Counter and Pulse Output ...
Page 169: ......
Page 170: ...Chapter 8 Communication ...
Page 227: ...Communication FPΣ User s Manual 210 LD Body ST Body ...
Page 233: ...Communication FPΣ User s Manual 216 POU Header LD Body ...
Page 236: ...FPΣ User s Manual 8 6 Program Controlled Communication 219 POU Header LD Body 1 2 ...
Page 237: ...Communication FPΣ User s Manual 220 2 2 ST Body ...
Page 266: ...Chapter 9 Security Functions ...
Page 273: ......
Page 274: ...Chapter 10 Other Functions ...
Page 277: ......
Page 278: ...Chapter 11 Troubleshooting ...
Page 289: ......
Page 290: ...Chapter 12 Appendix ...