Chapter 3 – Installation and Wiring
3–10
GLC2400/2500/2600 Series User Manual
3.2.3 Grounding
Do NOT use common grounding, since it can lead to an
accident or machine breakdown.
CAUTION
(A) Exclusive Grounding (BEST)
Connect the
FG
terminal found on the back of the
GLC
to an exclusive ground
(diagram A).
(B) Common Grounding (OK)
•
Make sure that the grounding resistance is less than 100
Ω
Ω
Ω
Ω
Ω
.
•
The SG and FG terminals are connected internally in the GLC unit.
•
When connecting the SG line to another device, be sure that the design
of the system/connection does not produce a shorting loop.
•
The grounding wire should have a cross-sectional area of at least
2 mm
2
. Create the grounding point as close to the GLC unit as possible,
and keep the wire as short as possible. Replace thin wire with a thicker
wire, and place it in a duct.
(C) Common Grounding (Not OK)
If the equipment does not function properly when grounded,
disconnect the ground wire from the FG terminal.
If exclusive grounding is not possible, use a common connection point (diagram B).