
2.CONNECTION OF THE COMMUNICATION FUNCTION CONNECTION B-63434EN/02
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NOTE
1 Ensure that the ground system of the personal
computer/trunk side is separated from the ground
system of the machine system. If ground system
separation is impossible because only one
grounding point is available, run the personal
computer/trunk side ground wire and the machine
side ground wire separately to the grounding point.
(See the figure below.) The ground resistance must
be 100 ohms or less (glass-2 grounding). The
ground wire must not be thinner than the AC power
line, and must be at least 5.5 mm
2
in diameter.
2 Even when the insulation/separation method based
on 10BASE-T is used as described above, noise can
impede normal communication. When a network is
used in such a very poor environment, consider the
use of 10BASE-FLAG (optical fiber media) to
completely separate the machine side from the
personal computer side.
73
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When only one grounding point is available