Siemens simatic c7-621 Hardware Installation Manual page 60

Configuring an MPI Network
5. Fit the green and red wires into the screw terminal as shown in Figure
1
Figure 3-11
6. Screw down the hinged clamp again.
7. Secure the green and red wires in the screw terminal.
8. Close the cover of the bus connector.
9. Tighten the cover screw.
3-16
3-11.
Make sure that you always insert the same colored wire into the same
terminal on all connectors (for example the green wire into terminal A
and the red wire into terminal B, or vice-versa).
Bus cable connector for the first
and last stations on the bus
A B A B
Ç Ç
Ç Ç
The bus cable can be connected either to the right or left!
Fitting the Bus Connector (6ES7 972-0B.20 ...) to the LAN Cable
Make sure that the bare cable shield makes contact under the shield
clamp.
Bus cable connection for all
1
other stations on the bus
A B A B
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C621-01