Siemens SIPROTEC 7UT613 series Manual page 347

Work on the Printed
Circuit Boards
Work on the Plug
Connectors
7UT613/63x Manual
C53000-G1176-C160-2
Caution!
Caution when changing jumper settings that affect nominal values of the
device:
As a consequence, the ordering number (MLFB) and the ratings on the name plate no
longer match the actual device properties.
Where such changes are necessary in exceptional cases, they MUST be marked
clearly and visibly on the device. Self-adhesive stickers are available that can be used
as supplementary name plate.
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" and „C". This activity does not apply if the device is for surface mount-
ing.
• If the device has additional communication interfaces (to „A",and „C") at the loca-
tions „B" and/or „D" on the rear, the screws located diagonally to the interfaces must
be removed. This activity does not apply if the device is for surface mounting.
• Remove the covers on the front panel and loosen the screws which can then be ac-
cessed.
• Carefully take off the front cover.
Caution!
Mind electrostatic discharges:
Non-observance can result in minor personal injury or property damage.
In order to avoid electrotrastic discharges when handling with plug connectors first
touch an earthed metal surface .
Do not plug or unplug interface connectors under voltage!
The arrangement of the boards for the different housing sizes can be seen in the fol-
lowing figures.
3.1 Mounting and Connections
347