Siemens siprotec 7SD5 User Manual

3.1 Mounting and Connections
453
7SD5 Manual
C53000-G1176-C169-1
3.1.2.2 Disassembly
Work on the Printed
Circuit Boards
Note
It is assumed for the following steps that the device is not operative.
Caution!
Caution when changing jumper settings that affect nominal values of the
device:
As a consequence, the ordering number (MLFB) and the ratings that are stated on the
nameplate do no longer match the actual device properties.
If such changes are necessary, the changes should be clearly and fully noted on the
device. Self-adhesive labels are provided for this which can be used as supplementary
nameplates.
To perform work on the printed circuit boards, such as checking or moving switching
elements or exchanging modules, proceed as follows:
• Prepare your workplace: prepare a suitable underlay for electrostatically sensitive
devices (ESD). Also the following tools are required:
– screwdriver with a 5 to 6 mm wide tip,
– a crosstip screwdriver for Pz size 1,
– a 5 mm socket wrench.
• Unfasten the screw-posts of the D-subminiature connectors on the back panel at
location „A“. This activity does not apply if the device is for surface mounting.
• If the device has more communication interfaces on the rear beside the interface at
location „A“, the screws located diagonally to the interfaces must be removed. This
activity does not apply if the device is designed for surface mounting.
• Remove the covers on the front panel and loosen the screws which can then be ac-
cessed.
• Remove the front panel and tilt it to the side.
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Siemens siprotec 7SD5 Specifications

General

Brand	Siemens
Model	siprotec 7SD5
Category	Relays
Language	English