Siemens EF 83H Series Manual de usuario descargar pdf (Pagina 48)

Connecting the Network

3-10

SIMATIC 505 PROFIBUS-FMS CP User Manual

Installing PROFIBUS Cables (continued)

The

device at each extreme end of a PROFIBUS cable must be terminated

and biased; any connections made between segment ends must not be

terminated or biased. See Figure 3-5.

= PROFIBUS-FMS station

ermination and bias required.

Segment end must be

terminated and biased.

NNN N

Controller with

PROFIBUS-FMS

CP module

Figure 3-5 Terminate

the Network at the Endpoints

Siemens PROFIBUS connectors have selectable termination and bias built

in. The connectors are designed to handle baud rates from 9600 baud to

12 Mbaud and have an external switch (see Figure 3-6). Y

ou set the

selection switch to the On position to enable termination and bias, or Off to

disable termination and bias.

9-pin

D-shell

connector

External

termination

switch

OFF

Figure 3-6 Siemens

Connector

, Exter

nal T

mination Switch

Ter

mination and

Bias

Using a T

ermination

Selection Switch

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Siemens EF 83H Series Manual de usuario Pagina 48