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PROFIBUS-DP Port
SIMATIC 505/500 PROFIBUS-DP RBC User Manual
The PROFIBUS-DP port is used to connect the RBC to the PROFIBUS-DP
I/O channel. The SIMATIC 545/555/575 System Manual describes how to
connect a 12 Mbaud RS-485 cable to the PROFIBUS-DP port. Figure 6
shows the pinout for the PROFIBUS-DP port for the PROFIBUS-DP RBC.
NOTE: Pins 2 and 7 are "No Connect" for the RBC. For some PROFIBUS
products, these pins are used to provide 24 VDC for powering a
programming or configuration tool. Such tools are not powered by the RBC;
however, it is acceptable for an externally-powered PROFIBUS
programming or configuration tool to drive pins 2 and 7 to 24 VDC.
(D-shell)
CHASSIS GND
9
8
TX/RX– (8)
7
6
Figure 6 PROFIBUS-DP I/O Port Pinouts
Pin 5 (BIAS SUPPLY +5V) and Pin 6 (BIAS SUPPLY GND) on the PROFIBUS-DP
connector are designed to support the PROFIBUS-DP I/O channel only. These
pins have a limited output power capability of approximately 0.45 W, which
greatly exceeds the typical PROFIBUS-DP load; however, overloading these
pins may cause internal component damage.
If the pins are overloaded, the PROFIBUS-DP port can be rendered
non-functional, requiring the unit to be returned to the factory for repair.
Do not overload the pins on the PROFIBUS-DP connector.
5
BIAS SUPPLY GND (5)
4
TX/RX+ (3)
3
2
1
* For Pin 3: Terminal B on Siemens connector.
* For Pin 8: Terminal A on Siemens connector.
CAUTION
!
Female 9-Pin D-Connector
Pin
Signal
1
CHASSIS GND
2
NO CONNECT
*3
TX/RX+
4
RTS
BIAS SUPPLY GND
5
6
BIAS SUPPLY +5V
7
NO CONNECT
*8
TX/RX–
9
BIAS SUPPLY GND
7
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