ESD guidelines
A.2 ESD measures
Hardware and Software
212 Service Manual, 03/2011, 6FC5397-5DP40-0BA0
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
and packing material are properly grounded.
Generally, electronic modules may not be touched unless work has to be carried out on
them. When handling PC boards make absolutely sure that you do not touch component
pins or printed conductors.
Components may only be touched under the following conditions:
– 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.
Boards/modules must only be placed on conductive surfaces (table with ESDS surface,
conductive ESDS foam, ESDS packaging, ESDS transport container).
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
(minimum distance to the screen > 10 cm).
Do not bring ESD-sensitive modules into contact with chargeable and highly-insulating
materials, such as plastic, insulating table tops or clothing made of synthetic materials.
Measurements may only be carried out on modules under the following conditions:
– 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).
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