Moeller SmartWire SWIRE-GW-DP, Hardware, Engineering And Function Description, Page: 18 / 49

Installation
14
11/06 AWB1251-1590GB
Terminating resistors The first and last slaves of a PROFIBUS-DP fieldbus segment
must be terminated with a switched on terminating resistor.
The bus termination resistors are connected externally. The
external connection can be implemented either with a
separate terminating resistor or by a special SUB D
connector.
The PROFIBUS-DP data plug from Moeller allows switching
on and off both termination resistors.
EMC-conformant wiring of
the network Undesired faults can occur on the fieldbus due to
electromagnetic interference. They can be minimised
beforehanc by the implementation of suitable EMC
measures. These include:
• EMC-conformant system configuration,
• EMC compliant cable installation and
• measures which do not allow potential differences to
occur,
• correct installation of the PROFIBUS system (cables,
connection of the bus connectors,…).
The electromagnetic interference can be significantly
reduced by the use of a cable screen (shield). The following
illustration indicates the correct method for connection of
the shield.