Fp Power Supply Connection Procedures - DEC FP775S Series User Manual

3-2-3
Fig. 1 - Connecting a Voltage Transformer
c o n s t a n t
voltage
transformer
Fig. 2 - Connecting an Insulating Transformer
insulating
transformer
Fig.s 3 & 4 - Separating Signal LInes
main
power
FP
main
power
power
power
input/output
main circuit
3-6

FP Power Supply Connection Procedures

Please pay special attention to the following points when connecting the
power cord to the FP-775S's Power Input Terminal Block.
Twisted
Lines
Twisted
Lines
FP
power
FP
input/output
unit
power
input/output
FP
Input/ Out-
put Unit
Input/ Out-
put Unit
Operation
Unit
Installation and Wiring
If the voltage supplied exceeds the FP's
designated range, connect a voltage transformer.
FP
Reference
tions", for the allowable voltage range.
Between the line and ground, select a power
supply that is low in noise. If there is an
FP
excessive amount of noise, connect an
insulating (noise reducing) transformer.
Use Voltage and Noise Reducing transform-
Note:
ers with capacities in excess of 100VA.
When supplying power to the FP, separate
the power input/output and operation signal
lines as shown in figure 3.
To increase the FP's noise resistance, twist
the power cord's wire ends before connect-
ing them to the FP.
The power cord must not be bundled or kept
close to the main circuit lines (high voltage,
high current), or input/output signal lines.
Chapter 2, "Specifica-
FP-775S User's Manual