LEDs and Connectors
Installation Instruction
4
CompactRIO
PROFIBUS DP
-Installation Instruction-V1.6/03.03.2010
COMSOFT
Business Confidential/
COMSOFT
Proprietary
2.3 Power connector
Parameter
Value
Nominal value
24 Volts DC
Input range
11 – 30 Volts DC
Power consumption
2.5 W in Active mode
(Receiving and
Transmitting)
Table 2: Power requirements
2.4 9 pin SUB D connector
Pin Number
Signal
Function
Direction
1
-
shielding
3
RxD/TxD-P
Data+
Input/Output
5
0V (potential free 80 mA)
Feeding of bus terminator
Input
6
5V (potential free 80 mA)
Feeding of bus terminator
Output
8
RxD/TxD-N
Data-
Input/Output
Table 3: Pin Assignment 9 pin SUB D connector
Remark:
To assure correct operation of the PROFIBUS, a terminating resistor must be
mounted at each bus end.
Figure 3: Profibus-Terminator (cable type B is no longer used)
220
Ω
390
Ω
390
Ω
0V
Data-
Data
+
+5V
150
Ω
390
Ω
390
Ω
Cable type A
Cable type B
