User manual

Chapter 2 – Hardware Installation
PS-2000B Series User Manual
2–12
2.3.2 Power Supply Precautions
This section provides the precautions in supplying power to the PS-B. Be sure to
take the precautions and connect the power cord to the power input terminal block
on the rear face of the PS-B.
• If the expected voltage fluctuations exceed the
specified range, connect a constant voltage
transformer.
7.1 General Specifications
• Use a low-noise power supply between the
lines and between the PS-B and its ground. If
there is excessive noise, connect an insulating
transformer (noise-prevention type).
• Be sure to use a constant voltage
transformer or insulating transformer
with capacity of 200 VA or more.
• Wire the power supply of the PS-B separately
from the wiring of I/O and motor devices.
• In order to improve the noise immunity,
attaching a ferrite core to the power cord is
recommended.
• Isolate the main circuit (high voltage and large
current) line, I/O signal lines, and power cord,
and do not bind or bring then in close contact.
Constant
voltage
transformer
Twisted-
pair cable
FG
PS-B
Constant
voltage
transformer
PS-B
Twisted-
pair cable
PS-B
I/O device
I/O
power
source
PS-B power
source
Main
power
source
AC 100 V
Main
power
source
PS-B power
source
PS-B
I/O device
I/O device
Motor
device
I/O power
source
Main circuit power source
AC 200 V
T1
T2
FG