
Upgrading Existing Series 500 Installations
C-23
SIMATIC 545/555/575 System Manual
2. Connect the RF (coaxial) cable to the PPX:505–6860 port that is labeled
RF To I/O BASES. See Figure C-8.
RS-485/RF
I/O Channel
Converter
RS-485 I/O
From PLC
RF To
I/O BASES
505–6860
Figure C-8 RS-485/RF Connector Ports
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