Wiring Of External Power Supply - Mitsubishi Electric GOT2000 Series User Manual

8.1

Wiring of External Power Supply

■1. Separating the power supply system
Carry out wiring so that the power supply system is separated into the GOT, I/O equipment, and power equipment as
shown below.
When frequent noise is identified, connect an isolation transformer.
■2. Separating the power cables from the main circuit line and the I/O signal line
Separate the 100 V AC, 200 V AC, and 24 V DC cables from the main circuit lines (high voltage, large current) and I/O
signal lines.
Separate them with a distance of 100 mm or more as a guide.
■3. Treatment on power cables
Twist 100 V AC, 200 V AC, and 24 V DC cables as closely as possible, and connect the cables with the minimum
length between the power supply and each device.
(1) For GT27, GT25, GT23, GT2107, and GT2105-Q
Use a thick wire (cross-sectional area: about 0.75 mm
Use the solderless terminal for M3, and tighten the terminal firmly with a torque of 0.5 N•m to 0.8 N•m.
(2) For GT2104-R, GT2104-P, and GT2103-P
Connect a stranded wire or a single wire directly, or use the rod terminal with an insulation sleeve.
Tighten the terminal firmly with a torque of 0.22 N•m to 0.25 N•m.
■4. Connecting the lightning surge absorber
As measures against surge due to lightning, connect a lightning surge absorber as shown below.
Separate the grounding of the lightning surge absorber (E1) from the grounding of the GOT (E2).
Select an appropriate lightning surge absorber that has the maximum allowable circuit voltage withstanding the
maximum power supply voltage.
(3) Releasing noise to the ground
(a) Make sure to connect the ground cable to the ground.
(b) Use a short and thick cable to lower its ground resistance.
(c) Ground the power system and the control system separately.
Isolation
GOT
transformer
power
Main power
I/O power
Main circuit power
AC
E1
GOT
T1
I/O equipment
Main circuit equipment
2 2
to 2 mm ) for less voltage drop.
GOT
E2
← Lightening surge
absorber

8.1 Wiring of External Power Supply

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