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399092.book Page 7 Friday, November 21, 2003 3:57 PM
Bulletin No. VVDED399092US
07/00
Section 1—Hardware Setup
Connection to the Bus
CONNECTION TO THE BUS
Cable Pin-Out
E
N
G
L
I
S
H
Figure 2 illustrates the pin-out for using RS-485 type communication.
9-Pin Sub-D
Female
RJ45
D(A)
5
0V
2
3
4
10V
7
6
D(B)
3
7
8
9
Figure 2:
Cable Pin-Out for RS-485 Communication
Wiring Practices for Connection to a Multidrop Bus
When wiring ATV28 drive controllers equipped with communication
options to a multidrop bus, follow the wiring practices required by national
and local electrical codes in addition to the following:
• Use metallic conduit for all drive controller wiring. Do not run multidrop
cable and power wiring in the same conduit.
• Separate metallic conduit carrying power wiring from metallic conduit
containing the multidrop cable by at least 3 in. (8 cm).
• Separate non-metallic conduit or cable trays used to carry power
wiring from metallic conduit containing multidrop cable by at least
12 in. (30.5 cm).
• Whenever power wiring and multidrop cable cross, the metallic conduit
and non-metallic conduit or trays must cross at right angles.
• For the multidrop cable, use shielded cable with one or two pairs of
twisted conductors. Use the cable recommended for each multidrop
bus system shown. Ground the shield only at one point.
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