EMC and ESD Measures
4.2 ESD measures
Manual
120
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
Note
For further information about RI suppression measures and the connection of shielded
cables see:
References:
/EMC/ EMC Directives
4.2
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.
•
Personnel may only touch components if
–
you are permanently grounded by means of an antistatic chain,
–
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).
NOTICE!
Modules with their own voltage sources (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 modules into contact with chargeable and highly-insulating materials, such
as plastic, insulating table tops or clothing made of synthetic materials.
•
Measurements on modules are allowed only if
–
the measuring instrument is properly earthed (e.g. equipment grounding conductor),
or
–
when floating measuring equipment is used, the probe is briefly discharged before
making measurements (e.g. a bare-metal control housing is touched).
