Design - Siemens SIPROTEC 4 7XT71 Mode D'emploi

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Design

6.1 General Structure
All electrical function groups are installed on a printed circuit board assembly. This
assembly also features a guide plate, an 18-pin plug connector and the front cover
forming a module that can be plugged in (in the following referred to as plug-in mod-
ule).
The plug-in module is installed in a 1/6 19" housing and is electrically connected to
the 18-pin terminal strip affixed to the rear plate. Contact springs connect the plug-
in module to the housing inside over a large area.
The electrical properties of the material used for the housing provide diversion and
shielding functions.
To connect the low-impedance protective conductor, the lower part of the rear plate
provides 2 contact points
be fastened with M4 screws over a large surface. 2 additional contact points
above are provided for grounding the shielding.
IP51 applies to the housing and IP20 to the screw terminals of the terminal strip.
NOTE
The Injection Unit 7XT71 is available for panel surface mounting, panel flush moun-
ting or cabinet flush mounting, depending on the ordering code, see Chapter 4.
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to which at least one copper band/conductor must
SIPROTEC 4, Injection Unit 7XT71, Product Information
C53000-B1175-C128-1, Edition 01.2014