Networking
5-20
S7-400 and M7-400 Programmable Controllers, Installation Manual
C79000-G7076-C424-01
Connecting Bus Cables to Bus Connectors (6ES7 972-0B.20 ...)
1. Strip the bus cable according to the following figure.
5.5
11
13
2
A
B
5.5
6
7.5
2
A
B
5.5
7
8
2
A
B
With PG connector
5.5
11
13
2
A
B
Angled outgoing cable unit
Without PG connector
2. Open the housing of the bus connector by slackening the housing screw and
swinging the cover upwards.
3. Slacken the clamp hinge cover.
4. The bus connector with order number 6ES7 972-0B.20 is supplied with an
angled outgoing cable unit and used as it is in the S7-400.
If the cable is to be routed vertically out of the housing:
– Slacken the left-hand screw on the clamp hinge,
– Raise the clamp hinge slightly, and
– Turn the clamp hinge inward.
– Screw the left-hand screw tight again.
5. Insert the green and red cores in the screw terminal block as shown in the
following figure.
Ensure that the same cores are always connected to the same terminals A or B
(for example, green conductor always wired to terminal A, and red conductor to
terminal B).
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