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Operational Safety Dispatching ESD Modules ESD Guidelines User Manual X Feeder M odules SIPLACE Family 17 2.3.5 Dispatchin g ESD Modules ► Always store modules and com ponents in conductive packaging (e. g. metallized pl…
Operational Safety
ESD Guidelines Definition of ESD
16 User Manual X Feeder Modules SIPLACE Family
2.3 ESD Guidelines
2.3.1 Definition of ESD
2.3.2 Important Measures to Protect Against Static Charging
►Most plastics can easily become charged and must therefore be kept away from at-risk components.
►Always ensure that people, the workplace and packaging are safely earthed when handling electro-
static sensitive components.
2.3.3 Handling ESD Modules
Do not touch electronic modules unless it is absolutely essential to do so in order to carry out other work.
If it is necessary, make sure that you do not touch the pins or printed conductors when you pick up flat
modules.
Do not touch components unless
▪ you are constantly earthed by an ESD wrist strap or
▪ you are wearing ESD shoes or ESD shoe earthing strips on an ESD floor.
Always discharge yourself before you touch an electronic module. To do this, simply touch a conductive
and earthed object immediately before you touch the module (such as unpainted parts of a switch
cabinet, a water pipe, etc.).
Do not allow modules with chargeable and highly insulating materials to touch one another, e.g. plastic
films, insulating table surfaces or items of clothing made from synthetic fibers.
Always place the modules on a conductive surface (table with an ESD coating, conductive ESD foam,
ESD bag or container).
Do not bring modules near visual display units, monitors or televisions. Keep them at least 10 cm away
from the screen.
2.3.4 Measurements and Modifications to ESD Modules
Do not take measurements on such modules unless
▪ the measuring device is earthed (e.g. via PE conductors) or
▪ you discharge the measuring head just before taking measurements with a potential-free measuring
device (e.g. by touching an unpainted metal part of the controller casing).
► Always use an earthed soldering iron if you carry out any soldering work.
Almost all of the modules in use today are equipped with highly integrated MOS blocks and compo-
nents. The manufacturing techniques used mean that these electronic components are extremely sen-
sitive to overvoltage and thus to electrostatic discharge.
The abbreviation for such modules is 'ESD' (Electrostatic Sensitive Device). This is
used internationally, although the German abbreviation 'EGB' may also be seen. The
following symbol on cabinet rating plates, racks or packaging indicates that compo-
nents which are sensitive to electrostatic discharge have been used and thus that the
modules concerned are also touch-sensitive.
ESDs can be destroyed by voltages and power levels that are far below the level that can be perceived
by humans. Such voltages occur if a person touches a component or module without earthing them-
selves. Components that are exposed to such overvoltages do not generally appear to be defective
immediately - incorrect behavior starts after the component or module has been in operation for some
time.
Operational Safety
Dispatching ESD Modules ESD Guidelines
User Manual X Feeder Modules SIPLACE Family 17
2.3.5 Dispatching ESD Modules
►Always store modules and components in conductive packaging (e.g. metallized plastic bags or metal
sleeves) and dispatch them in conductive packaging.
►If the packaging is not conductive, place the modules in a conductive envelope before packaging.
Use conductive expanded rubber, ESD bags, domestic aluminum foil or paper, for example. NEVER
use plastic bags or film.
►If the module has integral batteries, ensure that the conductive packaging does not touch or short-
circuit the battery terminals and, if necessary, first cover the terminals with insulating tape or mate-
rial.
Operational Safety
ESD Guidelines Dispatching ESD Modules
18 User Manual X Feeder Modules SIPLACE Family