ABB ACH 400, Руководство пользователя

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Chapter 3 – Installation
ACS/ACH 400 Direct N2 Bus Interface 3-3
Figure:3-1Communication wiring for ACS/ACH 400 Drives
The RS-485 connection is made using one of
the twisted pairs in the cable. The B terminals
are all connected together, and the A terminals
are all connected together. The logical grounds
for all of the drives are connected together
using terminal 4.
The shields at both ends of the cable are
connected to the drives. On one end, the shield
should be connected to terminal one, and on
the other end to terminal five. The shielding
must not be made continuous by connecting
the incoming and outgoing cable shields to the
same terminals. The proper shield connection
is shown in Figure 3–1.
The connections should be made only while
the drive is disconnected from the power
source.
Grounding and
Termination
The N2 Bus should not be directly grounded at
any point. All the devices on the network should
be well grounded using their corresponding
grounding terminals.
X3
1 SRC
2 B=N2+
3 A=N2-
4 AGND
5 SRC
ON
ON