B ESD directives
B.1 B.1 ESD guideline
Precautions against electrostatic discharge
Most plastics can be charged easily. Therefore, keep plastics away from ESD components!
When working with electrostatically sensitive components, make sure that the person, the workstation and the packaging are properly grounded. Conduct the electrostatic charge away from your body by touching the mounting plate for the interfaces, for example.
Handling ESD modules
As a rule: Only touch ESD components if unavoidable due to necessary tasks.
Only touch the components when the following holds true:
•You are permanently grounded by means of an ESD armband.
•You are wearing ESD shoes or ESD shoes grounding protective strips in connection with ESD floors.
Before you touch an electronic assembly, your body must be discharged. Touch a conductive object immediately beforehand, e.g. a bare metal part of a control cabinet or the water pipe.
Do not allow chargeable, highly insulated materials, e.g. plastic films, insulating tabletops, synthetic clothing fibers, to come into contact with ESD components.
Place ESD components only on conductive surfaces (work surfaces with ESD surface, conductive ESD foam, ESD packing bag, ESD transport container).
Do not expose ESD components to visual display units, monitors or televisions. Maintain a distance of at least 10 cm to screens.
Handle flat components only by their edges. Do not touch component connectors or conductors. This prevents charges from reaching and damaging sensitive components.
Measuring and modifying ESD components
Measure the ESD component under the following conditions only:
•The measuring device is grounded with a protective conductor, for example.
•The probe on the electrically isolated measuring device has been discharged, e.g. by touching the bare metal of a part of the control cabinet.
•Your body is discharged. To do so, touch a grounded metallic object.
Solder only with grounded soldering irons.
Shipping ESD modules
Always store or ship ESD components in conductive packaging, e.g. metallized plastic boxes or metal cans. Leave the components and parts in their packaging until installation.
If the packaging is not conductive, wrap the ESD component in a conductive material, e.g. rubber foam, ESD bag, household aluminum foil, or paper, before packing. Do not wrap the ESD component in plastic bags or plastic film.
In ESD components containing installed batteries, make sure that the conductive packaging does not touch the battery connectors or short circuit. Insulate the connectors with suitable material.
SIMATIC Panel PC 877 | |
Operating instructions, Release 07/2006, |
