Power Wiring; Precautions - Delta AH500 series Hardware Manual


Grounding a cable
Please ground a cable according to the steps below.
(1) Please ground a cable correctly.
(2) The area of the cross-section of the cable which is grounded should be 2 mm
2
than 2 mm .
(3) The ground point should be near the PLC. Ground the cable properly.
Note
(1) The 110 V/220 V power cable and the 24 V DC power cable should be thick cables. (The area of
the cross-section of the cable is 2 mm
twist the power cables at terminal screws. To prevent the short circuit which results from loose
screws, users need to use solderless terminals with insulation sleeves.
(2) If cables are connected to the terminals LG and FG, the cables need to be grounded. Do not
connect LG and FG to any devices. If LG and FG are not grounded, the PLC will be susceptible
to noise. Since LG have potential, users will get an electric shock if they touch metal parts.

5.2 Power Wiring

5.2.1 Precautions


The power wiring
(a) Please separate the power cable of AHPS05-5A from the power cables for the I/O device
and the power device. If there is much noise, connect an isolating transformer.
AC power supply
100-240 V
(b) The 110 V AC cable, the 220 V AC cable, and the 24 V DC cable should be twisted, and
connected to a module within a short distance.
(c) Do not bundle 110 V AC cable, the 220 V AC cable, the 24 V DC cable, the main circuit, and
the I/O signal cable together. Besides, it is recommended that the distance between
adjacent cables is 100 millimeters.
(d) To prevent the surge resulting from lightning, please install a surge absorber as follows.
AC power supply
Note:
1. The surge absorber and the PLC system should be grounded at different places.
2. Please select the surge absorber whose working voltage is not less than the maximum
allowable input voltage.
5 - 4
2
, and the diameter of the cable is 14 AWG.) Be sure to
Isolating transformer
Surge absorber
100-240V
C h a p t e r 5 OOWiring
2
AHPS05-5A
I/O equipment
Other equipment
AHPS05-5A
I/O equipment
or larger