Digital Equipment Pro-Face PL-6700 43 Series, Руководство пользователя

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Chapter 4 - Specifications
PL-6700 43 Series User’s Manual 4-9
(a) Dedicated Ground
*1
• Set up a dedicated ground when us-
ing 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 fig-
ure (b).
(c) Shared ground not allowed
PL
PL
Other
device
Other
device
Other
device
PL
The grounding point must be as close
to the PL as possible, and the ground-
ing wires must be as short as possible.
If the wires must be long, use thick,
insulated wires and run them through
conduits.
3. Grounding Cautions
4-3 Wiring the PL
Twisted-pair
cable
PL
FG
Lightning surge absorber
AC
E1
E2
• To prevent damage from lightning,
connect a lightning surge absorber.
• Ground the lightning surge ab-
sorber (E1) and the PL (E2) sepa-
rately.
• Select a lightning surge absorber
which will not exceed the allow-
able circuit voltage, even
when the voltage rises to the
maximum.
!!!!!
Important
Fig.4
*1 Use a grounding resistance of less than 100
Ω
and 2 mm
2
or larger wire , or your
country’s applicable standard. For details, contact your local PL distributor.