
5-5
Installing Remote Base Controllers—RBCs
SIMATIC 545/555/575 System Manual
5.3 Communication Ports
Series 505 RBCs, including the 505 PROFIBUS-DP RBC, have two
communication ports.
The RS-232 port is an interface to programming devices that use software
like TISOFT or other configuration tools. To connect your RBC to a
programming device/modem, use a standard 9-pin RS-232 serial cable that
conforms at a minimum to the pinouts shown in Figure 5-3. A standard
cable that conforms to the minimum requirements is available through
Siemens; specify part number 2601094–8001.
RBC RS-232/423
Pinouts
6
1
9
5
Programming Device/Modem
Pinouts
6
1
9
5
Signal Ground
Transmit Data
Receive Data
Signal Ground (5)
Transmit Data (3)
Receive Data (2)
Shield
3
2
3
2
9-Pin, Female
D-Connector
Note: The PPX:505–6851–A/B and PPX:505–6850–A/B RBCs require Pin 7 (RTS)
and Pin 8 (CTS) to be connected together as shown above (loopback).
Figure 5-3 RS-232 Serial Port, Minimum Cable Pinouts
The I/O port is used to connect the RBC to the PROFIBUS-DP or Series 505
remote I/O channel. Chapter 6 describes how to connect a cable to the I/O
port.
RS-232 Port
I/O Port
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