INSTALLATION 2
9-pin external female connector pinout
Pin Name Function
1 N.C. not connected
2 N.C. not connected
3 B-LINE (RS485+)
4 RTS Ready To Send
5 GND RS485 Bus Reference
6 + 5V (galvanically isolated) RS485 Bus Power Supply
7 N.C. not connected
8 A-Line (RS485-)
9 N.C. not connected
2.5.3 Connection to a Profibus Network
The following figure shows a Profibus layout with C-BOX 3X0 devices connected to a
Profibus Master:
Profibus DP
Slave node #1
PROFIBUS DP
Master
Profibus DP
Slave node #2
Profibus DP
Slave node #n
C-BOX 3X0
Figure 12 - Profibus Connection
It is recommended to use only commercially available PROFIBUS connectors for
connecting to the bus. Use connectors from ERNI and Siemens. If the C-BOX is
installed at the beginning or end of the PROFIBUS cable segment, it is
recommended to use PROFIBUS connectors, which contain an integrated
terminating resistor.
13