Technical data

Active components
4.5 Active components for the link from PROFIBUS DP to RS-232C
PROFIBUS Network Manual
System Manual, Edition 04/2009, C79000-G8976-C124-03
97
How it works
The PROFIBUS-DP/RS-232C Link is connected to the device over a point-to-point link.
Conversion to the PROFIBUSDP protocol takes place on the PROFIBUSDP/RS232C Link.
The data is transferred consistently in both directions. Up to 224 bytes of user data can be
transferred per frame.
Parameter assignment
The PROFIBUSDP address can be set using two rotary switches on the front panel. The
device is configured using the GSD file and the configuration tool of the connected device,
for example STEP 7.
4.5.2 Field distributors AFD/AFS
Overview
The active field distributors (AFD) and active field splitters (AFS) allow two variants of
redundant operation on a PA line:
● Ring redundancy with up to 8 AFDs
● Coupler redundancy with AFS
Figure 4-23 Field distributors AFD/AFS