Programmable Field Bus Controller 750-833
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53
Hardware
WAGO-I/O-SYSTEM 750
Bus System
3.2.3 Field Bus Connection
The PROFIBUS interface is designed as a D-Sub connection in accordance
with the US Standard EIA RS 485 for cable linked data transmission.
Fig. 3.2.3-3: Bus connection, D-Sub female connector
g012102x
Pin
Signal
Description
3
RxD(TxD)-P
Transmit (receive) signal
4
RTS
Ready to send
5 GND
Supply
ground
6 Vcc
Supply
voltage
8
RxD(TxD)-N
Transmit (receive) signal
The galvanic isolation between the field bus system and the electronics is
achieved by means of DC/DC converter and optocoupler.
The connection point is mechanically lowered permitting fitting in an 80 mm
high switch box once connected.