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Installation
4031_en_C PHOENIX CONTACT
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3.2.2 Serial communication
Two D-SUB 9 connectors (see Figure 3 - 4 ) can be configured to communicate on the
RS - 232, RS - 422, or RS - 485 physical layer.
The BL2 PPC 1201-4/… is capable of the following communication parameters:
The function of the pins in the D-SUB 9 connector varies with the different configuration
settings.
Table 3 - 3 RS-232/422/485 communication settings
Data bits Parity Stop bits
RS-232 7/8 None/Even/Odd 1/2
RS-422/485 Autotoggle RTS 8 None/Even/Odd 1/2
RS-422/485 Manual RTS 7/8 None/Even/Odd 1/2
The table shows the capabilities of the IPC. Configuration of parameters to communicate
with a specific device is typically part of the software tool performing the communication.
Table 3 - 4 D-SUB 9 pinout
D-SUB 9 pin RS-232 RS-422 RS-485
1 DCD TXD- TXD-/RXD-
2 RXD TXD+ TXD+/RXD+
3 TXD RXD+ –
4 DTR RXD- –
5 GND GND GND
6 DSR – –
7 RTS – –
8 CTS – –
9 Ring indicator – –