Mitsubishi GOT MELSEC A985GOT-TBA-EU User Manual page 34

(1) Power supply wiring
Separate the GOT's power supply line from the lines for I/O devices and
power devices as shown below.
When there is much noise, connect an insulation transformer.
Power supply wiring diagram
Main power
supply
200VAC
100VAC, 200VAC and 24VDC wires should be twisted as dense as
possible.
Connect the modules with the shortest distance.
Also, to reduce the voltage drop to the minimum, use the thickest wires
possible (0.75 to 2mm
Use a solderless terminal for M3 screw. Also, be sure to tighten the M3
screw within tightening torque 0.55 to 0.88 N m in order not to cause
trouble.
Do not bundle the 100VAC, 200VAC and 24VDC wires with, or run them
close to, the main circuit (high voltage, large current) and I/O signal
lines. Reserve a distance of at least 100 mm from adjacent wires.
As a countermeasure to power surge due to lightening, connect a surge
absorber for lightening as shown below.
Lightening surge absorber connection diagram
AC
POINT
(1) Separate the ground of the surge absorber for lightening (E1) from
that of the GOT (E2).
(2) Select a surge absorber for lightening whose power supply voltage
does no exceed the maximum allowable circuit voltage even at the
time of maximum power supply voltage elevation.
Insulation
GOT power
Transformer
supply
T1
I/O power supply
Main circuit equipment
2
).
E1
Surge absorber for lightening
23
GOT
I/O equipment
Main circuit equipment
GOT
E2