Connecting The Bus Cable; Cb15 Terminals - Siemens CB15 Operating Instructions Manual

PROFIBUS MODULE (CB15/CB155)
CB155
T CONNECTOR
BUS MASTER
Diagram showing typical PROFIBUS installation using CB155 and COMBIMASTER

2.2 Connecting the Bus Cable

2.2.1 Terminals

2.2.1.1 CB15 Terminals

The PROFIBUS connection must be made using the D-type socket on the front of the CB15. Connections to this
socket are as follows:
Pin 3 PROFIBUS P connection
Pin 8 PROFIBUS N connection
Additionally, the cable shield should be connected to the shell of the D-type connector, which is connected to
protective earth via the CB15 and inverter. The connector must be screwed securely to the CB15 to ensure both
mechanical strength and earth continuity.
Note
As the stations must be ' daisy-chained' together (except for the stations at either end of the bus), there
must be two cables into the D-type connector - one from the previous station and one to the next station.
This bus topology means that a station may be disconnected from the bus or powered down while still connected
without affecting bus operation.
COMBIMASTER
INTERCONNECTING CABLES - One or
more cables joined by cable links.
COMBIMASTER
CB 155
T CONNECTOR
7
English
Operating Instructions
COMBIMASTER
CB155
T CONNECTOR
TERMINATOR