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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 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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