Siemens S5-135U/155U - Manual (Page 550)

B-4
System Manual
C79000-G8576-C199-06
B.3 General Protective Measures Against Electrostatic Discharge
Damage
Make sure that the personnel, working surfaces, and packaging are
sufficiently grounded when handling electrostatically-sensitive devices.
You thus avoid electrostatic charging.
You should touch electrostatically-sensitive devices only if it is unavoidable
(for example, during maintenance work). Hold modules without touching the
pins of components or printed conductors. In this way, the discharged energy
cannot affect the sensitive devices.
If you have to carry out measurements on a module, you must discharge your
body before you start the measurement by touching grounded metallic parts.
Use grounded measuring devices only.
Ensure Sufficient
Grounding
Avoid Direct
Contact
Guidelines for Handling Electrostatically-Sensitive Devices (ESD)