Chapter 11 Installation and Wiring
11-10
4) In case of using a DC24V output of Power Module
y
Do not connect a DC24V output of several power module in parallel. If connected in parallel, the module
may be broken.
y
In case that DC24V output capacity of one power module is not enough, supply the external DC24V
power as below.
5)
AC110V, AC220V, DC24V cables should be twisted tightly and connected within the shortest distance.
6)
AC110V, AC220V cables use the thick cable (2mm
2
) to reduce the voltage drop.
AC110V, DC24V cables should not approach to main circuit (high voltage, high current) cable or I/O signal
cable. Keep more than 100mm if possible.
7) Use the surge absorber against lightning as shown in the figure below.
8)
Use the shielded insulation trans or noise filter when a noise invasion is expected.
9) The wiring of each input power should be twisted shortly if possible, and the shielded trans or noise filter
wiring should be done without passing the duct.
Notes
1) Separate PLC earth(E2) from the earth(E1) of surge absorber against lightning.
2) Select the surge absorber against lightning not to exceed max. allowable voltage of surge absorber
in case of rising the power voltage at max.
24V
LG
FG
AC
I
/
O
24V
LG
FG
AC
I
/
O
Power
Supply
DC 24V
E2
PLC
I/O device
E1
Surge absorber against lightning
24V
LG
FG
AC
I
/
O
Power
Power
Power