4-3
2) Voltage selection (for only AC power supply)
100V AC : Short (using a jumper cable)
200V AC : Open
3) Grounding
• Connect the FG terminal to the integrated ground section of each control panel (FG bus, FG integrated terminal block, or
stud) in branch-type configuration. The thickness of the ground wire must be 2mm
2
. Allocate the grounding point as near
the module as possible, and keep the ground wire as short as possible.
• The integrated ground section of each control panel must be connected to the integrated ground board, which is installed
according to the distribution of devices in a branch-type configuration. The thickness of the ground wire must be 5.5mm
2
or more.
• Separate the ground wire as far from the lines of high-voltage circuits and main circuit as possible. In addition, keep the
distance at which they run in parallel as short as possible.
• For grounding, use an exclusive ground pole and wire which are separated from the ground system of other power cir
cuits.
• The grounding should be exclusive. The grounding resistance is 100 or less. Separate the ground pole 10m or more
from that of other power circuit.
• When installing in a place affected by frequent lighting surges, all the CPU modules and input/output modules should be
electrically insulated from the control panel. Also, modules and units should be earthed to ground individually.
Do not open the FG terminal with LG-FG short circuited. (It must be grounded, otherwise it might cause electric
shock.)
Warning
Section4 Installing the PC & Wiring of power supply
PC
Other
device
PC
PC
Grounding
resistance
100 or less
ΩΩ
ΩΩ
Ω
Other
device
Other
device
ΩΩ
ΩΩ
Ω
Grounding
resistance
100 or less
ΩΩ
ΩΩ
Ω
Exclusive grounding....Best Common grounding....Good Common grounding ....Not acceptable
To Next Page
Loading...
