Installation and Wiring
4-8
PL-5700 Series User’s Manual
3
Grounding Cautions
(a) Dedicated ground
• Set up a dedicated ground when using
the rear panel’s FG terminal.
Figure (a) = Class III Ground with a maxi-
mum grounding resistance of 100
Ω.
(b) Shared ground allowed
• If a dedicated ground is not possible, use
a shared ground, as shown in figure (b).
The grounding point must be as close to
the PL as possible, and the grounding wires
must be as short as possible. If the wires
must be long, use thick, insulated wires and
run them through conduits.
(c) Shared ground not allowed
PL
PL
Other
device
Other
device
Other
device
Class III Ground
Class 3
PL
4
Cautions When Connecting I/O Signal Lines
• I/O signal lines must be wired separately from the power circuit cable.
• If the power circuit cable needs to be wired together with the input/output (I/O)
signal lines for any reason, use shielded cables and ground one end of the shield to
the PL’s FG terminal.
• To improve noise immunity, it is recommended to attach a ferrite core to the power
cord.
*1
Use a grounding resistance of less than 100
Ω
and a 2mm
2
or greater thickness wire,
or your country’s applicable standard. For details, contact your local GP distributor.
