Proface GP4100 - 3.4 Compact HMIs" - Manual (Page 58)

Chapter 4 Installation and Wiring
4-13
4.2.3 Grounding
This section describes the precautions for grounding the GP unit.
• When supplying power to the GP unit, be sure to separate the
input/output and power lines, as shown. [diagram (a)]
• If exclusive grounding is not possible, use a common grounding
point. [diagram (b)] A D-type grounding or equivalent should
be used for the grounding point.
CAUTION
UNINTENDED EQUIPMENT OPERATION AND DAMAGE
• Do not use common grounding, since it can lead to an accident or machine breakdown.
Failure to follow the instruction will result in equipment damage.
• Check that the grounding resistance is
100
Ω or less.
• FG and SG terminals are internally
connected in the GP. When connecting
an external device to the GP using the
SG terminal, be sure to check that no
short-circuit loop is created when you
setup the system.
• The grounding wire should have a cross
sectional area greater than 2mm
2
(14
AWG) Create the grounding point as
close to the GP unit as possible, and
make the wire as short, as possible.
When using a long grounding wire,
replace the thin wire with a thicker wire,
and place it in a duct.
• If the equipment does not function properly
when grounded, disconnect the ground wire
from the FG terminal.
(a) Exclusive Grounding (BEST)
(b) Exclusive Grounding (OK)
(C) Common Grounding (Not OK)
GP
GP
Other
Equipment
Other
Equipment
GP
Other
Equipment