Esd Measures; A.2 Esd Measures - Siemens sinumerik 828d Service Manual

ESD guidelines

A.2 ESD measures

A.2

ESD measures

CAUTION
The modules contain electrostatically sensitive devices. Discharge yourself of electrostatic
energy before touching the electronic modules. The easiest way to do this is to touch a
conductive, grounded object immediately beforehand (for example, bare metal parts of
control cabinet or the protective ground contact of a socket outlet).
NOTICE
Handling ESDS modules:
 When handling electrostatically sensitive devices, make sure that operator, workplace
 Generally, electronic modules may not be touched unless work has to be carried out on
 Components may only be touched under the following conditions:
 Boards/modules must only be placed on conductive surfaces (table with ESDS surface,
Exceptions:
Modules with their own power supply units (e.g. batteries) are an exception. These may not
be placed on conductive surfaces, as this might result in short circuits and thus destroy the
component on the module.
 Never place modules in the vicinity of display units, monitors, or television sets
 Do not bring ESD-sensitive modules into contact with chargeable and highly-insulating
 Measurements may only be carried out on modules under the following conditions:
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and packing material are properly grounded.
them. When handling PC boards make absolutely sure that you do not touch component
pins or printed conductors.
– You are permanently grounded by means of an ESD armband.
– You are wearing ESD boots or ESD boots with grounding strips in conjunction with
ESD flooring.
conductive ESDS foam, ESDS packaging, ESDS transport container).
(minimum distance to the screen > 10 cm).
materials, such as plastic, insulating table tops or clothing made of synthetic materials.
– The measuring device is grounded (via a protective conductor).
– When floating measuring equipment is used, the probe is briefly discharged before
making measurements (e.g. a bare-metal control housing is touched).
Hardware and Software
Service Manual, 03/2011, 6FC5397-5DP40-0BA0