Profibus Dp; Safety-Related Control Signals; Wiring The Profibus Plug Connector; Emc - Honeywell Krom Schroeder BCU 480 Manual

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6 .17 PROFIBUS DP

6 .17 .1 Safety-related control signals

Signals from the safety interlocks and digital input are
transferred independently of the bus communication
by separate cables.
The purge signals can be transferred via the bus com-
munication or by a separate cable.

6 .17 .2 Wiring the PROFIBUS plug connector

BCU..B1/1
2A 2B 1A 1B
PROFIBUS DP
The PROFIBUS plug connector must be ordered sepa-
rately, see page 71 (Accessories).
Data cables A and B must not be reversed.
The power supply for the bus terminator is provided by
the BCU. The bus terminator can be connected in the
PROFIBUS plug connector.
Ensure an equipotential bond between the different
slaves and masters.

6 .17 .3 EMC

To achieve a high immunity of the system against elec-
tromagnetic interference radiation, a shielded data
BCU 480 · Edition 03.16l
ON
ON
OFF
OFF
cable must be used. The shield must be connected to
protective earth on both sides using wide-area shield
clips that ensure good conductivity.
In addition, it must be ensured that all cables leading to
and from the BCU ® be installed as far away as possible
from cables emitting strong fields (e.g. frequency con-
verter cables).

6 .17 .4 Unit replacement

A BCU..B1 (for PROFIBUS) may only be replaced by a
BCU..B1. BCUs without a PROFIBUS connection may
not be replaced by a BCU..B1.
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