Digital Equipment FP-770T Series, Руководство пользователя

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FP-770T User's Manual 3-7
Installation and Wiring
3-2-5 FP Input/Output Signal Line Cautions
Input and output signal lines must be separated from power cables.
If this is not possible, use a shielded cable and connect the shield to the FP
chassis.
3-2-4 FP Grounding Cautions
other
equipment
(a) Exclusive grounding (BEST)
(b) Common grounding (OK)
If exclusive grounding is not possible, use
a common grounding point.
The grounding wire should have a
cross section larger than 2mm
2
. Make
the connection point as close to the
FP as possible, and make the wire as
short as possible. When using a long
grounding wire, use a thicker wire
placed in a duct.
If the FP does not function properly
when grounded this way, disconnect
the ground wire from the FP's FG ter-
minal.
Connect the FP's FG terminal to an
exclusive ground. [Grounding
resistance of under 100
Ω
.]
FP
other
equipment
FP
FP
other
equipment
(c) Common grounding (BAD)
Exclusive grounding
(CLASS 3)