4 Each Component Function
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PT-E731, PT-E731S, PT-E731H, PT-E731HS User’s Manual
(c) The PT-E, I/O equipment and power equipment should be wired separately as shown below.
Figure 4.7 I/O equipment and Power equipment
(d) When increasing power cable length, twist cable as tightly as possible and connect it within the
shortest distance.
(e) When increasing power cable length, use cable as thick (2 mm
2
) as possible to decrease voltage drop.
CAUTION
Do not bundle or run the power cable with the main circuit (high voltage, large current) cables and
I/O signal cables. Where possible, run it at least 100mm (3.94 inches) away from them.
Normally use wire of 0.75 to 2 mm
2
for po wer supply cable.
(f) As a measure against any potential surges due to lightening, connect a surge absorber as shown
below.
Figure 4.8 Ground lightening surge absorber
CAUTION
Ground lightening surge absorber (EA) and PT-E’s power cable earth wire (EB) separately.
Select the lightening surge absorber that not exceeds the maximum permissible circuit voltage of the
sure absorber at the maximum power supply voltage.
