
Cabling and Wiring the System
6-26
SIMATIC 545/555/575 System Manual
Installing PROFIBUS-DP I/O Cables (continued)
Figure 6-16 shows the schematic for PROFIBUS-DP connectors designed to
handle all baud rates, from 9600 baud to 12 Mbaud (as listed in Table 6-4).*
Pin 6
(BIAS SUPPLY +5V)
Pin 5
(BIAS SUPPLY GND)
Pin 3
(TX/RX+)
Pin 8
(TX/RX–)
Termination Resistor, 220 ohm, 1/8 W, 5%
Pins 1, 2, 4, 7, and 9 are not connected.
Bias Resistor, 390 ohm, 1/8 W, 5%
Bias Resistor, 390 ohm, 1/8 W, 5%
110 nH
110 nH
110 nH
110 nH
Internal Connection B
Internal Connection B
Internal Connection A
Internal Connection A
Figure 6-16 9600 baud to 12 Mbaud Connector Schematic
PROFIBUS-DP
Connector
Schematics
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