
6-27
Cabling and Wiring the System
SIMATIC 545/555/575 System Manual
Figure 6-17 shows the schematic for connectors designed only to handle low
baud rates, from 9600 baud to 1.5 Mbaud (as listed in Table 6-5).*
Pin 6
(BIAS SUPPLY +5V)
Pin 3
(TX/RX+)
Pin 8
(TX/RX–)
Pin 5
(BIAS SUPPLY GND)
Bias Resistor, 390 ohm, 1/8 W, 5%
Termination Resistor, 220 ohm, 1/8 W, 5%
Bias Resistor, 390 ohm, 1/8 W, 5%
Internal Connection B
Internal Connection B
Internal Connection A
Internal Connection A
Pins 1, 2, 4, 7, and 9 are not connected.
Figure 6-17 9600 baud to 1.5 Mbaud Connector Schematic
PROFIBUS-DP I/O channel connection to some slaves cannot be
accomplished with the standard Siemens connector. Refer to the slave
documentation for termination and bias options and ensure that every
PROFIBUS-DP device that requires termination and bias meets the
schematics shown in Figure 6-16 and Figure 6-17.
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