Pro-face PL-DU6900, Руководство пользователя

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Chapter 4 - Installation and Wiring
4-8 PL-DU6900/PL-DU7900 User Manual
4.3.4 Grounding the DU
4.3.5 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 DU’s FG terminal.
• To improve noise immunity, attaching a ferrite core to the power cord is
recommended.
DU
Other
device
DU
Other
device
Other
device
DU
(c) Shared ground - not allowed
(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 DU 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.
*1 Use a grounding resistance of less than 100
Ω
and a 2mm
2
or thicker wire, or your country’s
applicable standard. For details, contact your local DU distributor.