7.1 Power Supply Wiring
7
- 3
1
OV
E
R
VI
EW
2
SYSTE
M
CO
N
F
IG
UR
A
T
IO
N
3
S
P
E
CI
F
ICA
T
ION
S
4
P
A
R
T
NA
ME
AND
SETTING
S
5
EMC AND
LO
W
VO
LT
AG
E
DIRE
CT
IVE
6
INS
TAL
L
A
TI
ON
7
WIRING
8
OP
TIO
N
7.1 Power Supply Wiring
• Make wiring connections to the power supply, I/O equipment and power equipment separately by system
as shown below.
When frequent noise is identified, connect an isolation transformer.
Wiring diagram for power supply
• Twist 100V AC, 200V AC or 24V DC cable as closely as possible and connect the cable of the minimum
length between modules.
Also, use the thickest cable as possible (Max. 2mm
2
) to minimize the voltage drop.
Use M3 solderless terminals and securely tighten them with a tightening torque of 0.5 to 0.8N•m so that
no problem will result.
• Separate the 100V AC, 200V AC or 24V DC cable from the main circuit lines (high voltage, large current)
and/or I/O signal lines.
Keep a distance of 100mm or more.
• As measures against surge due to lightning, connect a lightning surge absorber as shown below.
Lightning surge absorber connection
1. Separate the grounding of the lightning surge absorber (E1) from the grounding
of the GOT (E2).
2. Select an appropriate lightning surge absorber so that the supply voltage does
not exceed the maximum allowable circuit voltage of the surge absorber even
when it rises to the maximum.
T1
Main power
GOT
power
GOT
Isolation
transformer
I/O power
Main circuit
power
I/O equipment
Main circuit equipment
AC
E1
E2
Lightning surge absorber
GOT
I/O equipment
