NAiS FP Series, Hardware Manual

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FP0 Hardware Wiring
9-6 Matsushita Electric Works (Europe) AG
9.3 Grounding
Under normal conditions, the inherent noise resistance is sufficient. However, in
situations of excess noise, ground the instrument to increase noise suppression.
For grounding purposes, use wiring with a minimum of 2mm
2
. The grounding
connection should have a resistance of less than 100
W
.
FP0
FP0
CORRECT
Other
device Other
device
Notes
The point of grounding should be as close to the FP0 control
unit as possible. The ground wire should be as short as
possible.
If two devices share a single ground point, it may produce an
adverse effect. Always use an exclusive ground for each
device.
Depending on the surroundings in which the equipment is
used, grounding may cause problems.
Example:
Since the power supply line (24V DC and GND terminal) of the
FP0 power supply connector is connected to the frame ground
(F.G.) through a varistor, the varistor may be shorted out if
there is an irregular potential between the power supply line
(24V DC and GND) and ground.
24V DC
GND
F.G.
Varistor Varistor (39V DC)
Power supply
lines
Power supply connector of FP0
control unit


