Pro-face PL-7900 Series, User Manual

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4-9
PL-7900 Series User Manual
Installation and Wiring
(a) Dedicated Ground - best *1
• Set up a dedicated ground when using the
rear panel’s FG terminal.
(b) Shared Ground - allowed *1
• 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
3 Grounding Cautions
PL
PL
Other
device
Other
device
4 Cautions When Connecting I/O Signal Lines
• I/O signal lines must be wired separately from the power cord. If the power code
needs to be wired together with the cord (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, attaching a ferrite core to the power cord is recom-
mended.
Other
device
PL
*1 Use a grounding resistance of 100
Ω
or less, and a 2mm
2
or thicker wire, or your
country’s applicable standard. For details, contact your local PL distributor.
.