Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
Components that can be destroyed by Electrostatic Sensitive
Handling of ESD modules:
When you are handling ESD-sensitive devices, make sure that you, your
workplace and the device packaging are grounded well.
As a general rule, electronic boards should only be touched when absolu-
tely necessary. Never hold PCBs in such a way that you touch the module
pins or printed conductors.
Do not touch ESD-sensitive components unless
– you are grounded by means of an antistatic wristband,
– you wear antistatic footwear or ground straps when walking on an anti-
Place sensitive modules only on high-resistance, conductive surfaces (table
with antistatic surface, conductive antistatic foam or antistatic packaging).
Do not bring ESD-sensitive modules into the vicinity of visual display units,
monitors or TV 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 on ESD-sensitive modules may only be carried out if
– the measuring equipment is grounded (e.g. via the protective conductor)
– in the case of floating measuring instruments, the probe is briefly dis-
charged before a measurement is taken (e.g. through contact with bare
The unit may be used only for the applications described in the catalog, and
only in combination with the equipment and components recommended and
approved by SIEMENS (e.g. SINUMERIK 840D/FM-NC).
SINUMERIK 840Di Manual