Mitsubishi 900 Series User Manual page 51

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
6 - 6
6.1 GOT Main Unit
6.1.3 Wiring method
Insulation
GOT power
Transformer
supply
T1
I/O power supply
Main circuit equipment
GOT
E2
E1
Surge absorber for lightening
(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.
GOT
I/O equipment
Main circuit equipment
2
).