Cautions: 100V Pl-5700T*/S*/L* Units - PROFACE PL-5700 Series Manual

Installation and Wiring
2

Cautions: 100V PL-5700T*/S*/L* Units

When connecting power to the 100V PL Unit's AC power terminals, please be aware of the following:
Constant
voltage
transformer
Insulating
transformer
100V AC
Main power
source
Main power
source
200V AC
Twisted-pair
cable
AC
PL-5700 Series User's Manual
Twisted-pair
cable
PL
FG
Twisted-pair
cable
PL
FG
PL
PL power
source
I/O
I/O power
device
source
PL
PL power
source T1
T2
I/O
device
I/O power
source
I/O
device
Power
device
Main circuit
power source
PL
FG
E1
Lightning surge absorber
• If voltage fluctuations are expected to vary be-
yond the specified range, connect a constant
voltage transformer.
For information about the specified
voltage, refer to "2-1 General
Specifications"
• Use a low-noise power supply both be-
tween the lines and between the PL and its
ground. If there is still excess noise, con-
nect an insulating transformer (noise-pre-
vention type) .
Be sure any constant or insulating
transformer used has a capacity of 200V
AC or more.
• Wire the power cords of the 100V PL, I/O
devices, and power supply devices sepa-
rately.
• To improve noise immunity, it is recom-
mended to attach a ferrite core to the power
cord.
• Isolate the main circuit (high voltage, large
current) line, I/O signal lines, and power
cord, and do not bind or group them to-
gether.
• To prevent damage from lightning, connect a
lightning surge absorber.
• Ground the lightning surge absorber (E1)
and the PL (E2) separately.
• Select a lightning surge absorber which will
not exceed the allowable circuit voltage, even
when the voltage rises to the maximum.
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