GP-377 Series Users Manual
3-5
Do not use common grounding, since it can lead to an
accident or machine malfunction.
3.2.2 Grounding the GP
(a) Exclusive Grounding (BEST)
*1
Connect the FG terminal found at
the back of the unit to an exclusive
ground. [diagram (a)].
CAUTION
(b) Common Grounding (OK)
*1
• Check that the grounding re-
sistance is less than 100
Ω
Ω
Ω
Ω
Ω
.
• The grounding wire should
have a cross sectional area
greater than 2mm
2
. Set the
connection point as close to
the GP unit, and make the
wire as short, as possible.
When using a long grounding
wire, replace the thin wire
with a thicker wire, placed in
a duct.
(c) Common Grounding (Not OK)
Input and output signal lines must be separated from the power control cables
for operating circuits.
If this is not possible, use a shielded cable and connect the shield to the GP's
frame.
3.2.3 Placement of I/O Signal Lines
If exclusive grounding is not pos-
sible, use a common connection
point. [diagram (b)]
If the equipment does not function
properly when grounded, disconnect
the ground wire from the FG termi-
nal.
*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.
Summary of Contents for GP-377 Series
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