F5 SERVICE MAUNAL - 第42页
1 Operational Safety SIPLACE 80S-20/F4/F4-6/F5 Ser vice Manual 1.8 ESD guidelines E dition 04/98 1 - 32 Always place th e modules on a con ductive surfa ce (table wi th an E SD coati ng, co nductive ESD foam, ESD bag or …
SIPLACE 80S-20/F4/F4-6/F5 Service Manual 1 Operational Safety
Edition 04/98 1.8 ESD guidelines
1 - 31
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1.8.1 What does ESD mean?
Almost all of the modules in use today are equipped with highly integrated MOS blocks and components. The
manufacturing techniques used mean that these electronic components are extremely sensitive to overvolt-
age and thus to electrostatic discharge.
The abbreviation for such modules is ’ESD’ (E
lectrostatic 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 components which are sensi-
tive 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 themselves. 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.
1.8.2 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 electrostatic
sensitive components.
1.8.3 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.
1 Operational Safety SIPLACE 80S-20/F4/F4-6/F5 Service Manual
1.8 ESD guidelines Edition 04/98
1 - 32
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.
1.8.4 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.
1.8.5 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 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 material.
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Service Manual SIPLACE 80S-20/F4 2Overview Diagrams
Edition 03/97
0 - I
Content
Page
2Overview Diagrams
2.1 Electrical System SIPLACE 80S-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Electrical System SIPLACE 80F4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2.3 Electrical System Overview Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39