DVP-ES3 Series Operation Manual
4-10
4.5 Connecting Power Cables
4.5.1 Precautions
Connecting AC power cables
(1) The cables carrying the 110 VAC, 220 VAC, and 24 VDC should be single or two-wire cables.
(2) Do not bundle 110 VAC cable, 220 VAC cable, 24 VDC cable, the (high-voltage high-current) main
circuit, and the I/O signal cable together. The distance between adjacent cables should be more than
100 millimeters (3.94 inches).
(3) To prevent electrical surge from lightning, install a surge protector as shown below.
AC power supply
100-240V
DVP-ES3
CPU Module
Surge absorber
Points for attention:
1. Ground the surge protector and the PLC system.
2. Select the surge protector with a working voltage that 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 using multiple pieces of equipment, use
a single-point ground.
DVP-ES3
CPU Module
Another piece of
equipment
The single-point ground is better.
If you cannot use a single-point ground,
use a common-point ground.
DVP-ES3
CPU Module
The common-point ground is permitted.
Another piece of
equipment
Do not connect equipment ground wires
together as shown on the right.
DVP-ES3
CPU Module
The equipment can not be grounded in this way.
Another piece of
equipment