Chapter 9. Installation and Wiring
9-7
9.2 Wiring
The followings explains the wiring instructions for use of the system.
9.2.1 Power supply wiring
(1) When voltage fluctuations are larger than the specified value, connect a constant-voltage transformer
.
(2) Use a power supply which generates minimal noise across wire and across PLC and ground. (When excessive noise is
generated, connect an insulating transformer)
(3) Connect a power supply hat has less noise (if there are lots of noise, use insulated transformer).
(4)
When wiring, separate the PLC power supply from those for I/O and power device as shown below.
※ T1,T2 : constant voltage transformer
(5)
To minimize voltage drop, use the thickest (max. 2 ㎟) wires possible
(6) Do not bundle the 100 VAC and 24VDC cables with main-circuit (high voltage, large current) wires or the I/O signal wires.
If possible, provide more than 80 ㎜ distance between the cables and wires.
AC100-240V
FG
GM7U
main unit
Constant-voltage transformer
T1
T2
PLC
Main power
AC220V
PLC power
I/O power
Main circuit
Main circuit device
I/O device
To Next Page
Loading...
