Ground - Delta AH500 Hardware Operation Manual

A H 5 0 0 H a r d w a r e a n d O p e r a t i o n M a n u a l

Connecting DC power cables
(1) AHPS15-5A is independently supplied with power by a DC power supply. Please separate the power
cable of the DC power supply from the power cables for I/O devices and other devices. If there is
much noise, connect an isolating transformer.
AC power supply
100-240 V
(2) The 110 VAC cable, the 220 VAC cable, and the 24 VDC cable should be twisted, and connected to a
module within a short distance.
(3) Do not bundle 110 VAC cable, the 220 VAC cable, the 24 VDC cable, the (high-voltage high-current)
main circuit, and the I/O signal cable together. Besides, it is recommended that the distance between
adjacent cables should be more than 100 millimeters.
(4) To prevent the surge resulting from lightning, please install a surge absorber in the way shown below.
AC power supply
100-240V
Points for attention:
1. The surge absorber and the PLC system should be grounded separately.
2. Please select the surge absorber whose working voltage is not less than the maximum allowable
input voltage.

4.5.2 Ground


The diameter of the ground should not
be less than the diameters of the cables
connected to the terminals L and N.

If much equipment is used, please use
single-point ground.

If single-point ground can not be used,
please use common-point ground.

Users can not ground equipment in
the way shown on the right.
4 - 2 2
Isolating transformer
DC
powe r
s upply
Surge absorber
DC power s uppl y
I/O equipment
Another piec e of equipment
AHPS05-5A
AHPS15-5A
T he single-point gr ound is better.
AHPS05-5A
AHPS15-5A
T he common-point gr ound is permitted.
AHPS05-5A
AHPS15-5A
The equi pment c an not be gr ounded in thi s way.
24 V DC
AHPS15-5A
I/O equipment
Another piec e of equipment
Another piece of
equipment
A nother piece of
equipment
Another piece of
equipment