Siemens SIPROTEC 4 7XT71 Mode D'emploi page 24

NOTICE
The printed circuit board assembly of the device contains electrostatic sensitive
devices (ESD), for example CMOS circuits
Non-observance of the ESD regulations can result in material damage.
✧ Observe the ESD regulations.
✧ Prevent electrostatic charging in the environment of the printed circuit board
assembly.
✧ It is not allowed to plug in or remove the plug-in module when auxiliary voltage
is applied.
There is no risk once the modules are installed.
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SIPROTEC 4, Injection Unit 7XT71, Product Information
C53000-B1175-C128-1, Edition 01.2014