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Profibus-dp – Fairbanks FB2550 DAT SERIES DRIVER ACCESS TERMINAL User Manual

Page 96

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Section 4: Input/ Output

2/2013

96

51303 Rev. 1

5.8.5. PROFIBUS-DP

PROFIBUS-DP

(

30922

) is one of the best-known

industrial Fieldbus protocols from Europe.

– It is an established standard, used in a wide

range of applications as a multi-application
communications link for industrial devices.

– The PROFIBUS-DP protocol was originally

developed by a committee founded by the
German government.


PROFIBUS-DP

utilizes a non-powered two-wire (RS-485) Network.

– A PROFIBUS-DP Network may have up to 126 nodes, transfering a

maximum of 244 bytes data per node/ per cycle.

– Baud (Communication) Rates are selectable, and overall end-to-end network

distance varies with speed.

– The maximum standard Baud Rate is 12Mbps, with a maximum distance of

100M (328ft),

and 1200M (3936 ft) at 93.75Kbps without repeaters.

PROFIBUS-DP

connects to a wide variety of field devices including the

following:

Discrete and analog I/O Drives.
Robots.
HMI/MMI products.
Pneumatic valves.
Barcode readers.
Weigh scales.
Transducers.
Flow measuring equipment.

PIN

SIGNAL

DESCRIPTION

3

B-Line

Positive RxxD/TxD, Rs485 level

4

RTS

Request to Send

5

GND

Ground (Isolated)

6

+5 Bus
Output

+5V termination power (Isolated,
short circuit protected)

8

A-Line

Negative RXD/TxD, RS485 level