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4 EMC and ESD Measures
4.3
Heat dissipation
4.2
ESD measures
!
4.3
Heat dissipation
!
4-36
Important
Handling of modules containing devices sensitive to electrostatic discharge:
S
When handling electrostatically sensitive devices, make sure that operator,
workplace and packing material are properly earthed.
S
Generally, electronic modules must 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.
S
Touch components only if
– you are permanently earthed by means of an antistatic chain,
– you are wearing ESD boots or ESD boots with earthing strips in con-
junction with ESD flooring.
S
Modules may be placed only on electrically conductive surfaces (table with
ESD top, conductive ESD foam plastic, ESD packing bags, ESD transport
containers).
S
Keep modules away from visual display units, monitors or TV sets (mini-
mum distance from screen > 10 cm).
S
Modules must not be brought into contact with chargeable and highly insu-
lating materials, such as plastic films, insulating table beds or clothing made
from artificial fibres.
S
Measurements on modules are allowed only if
– the measuring instrument is properly earthed (e.g. equipment grounding
conductor), or
– before measuring with a potential-free measuring instrument, the probe
is briefly discharged (e.g. touch the unpainted metal parts of the control
housing).
Please note:
Caution
A ventilation clearance of 100 mm must be left above and below the drive com-
bination when it is installed.
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
© Siemens AG 2006 All Rights Reserved
03/2006
J
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