Emerson Net Safety ST3, Справочное руководство

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5 Electrostatic sensitive device
Electrostatic discharge (ESD) is the transfer, between bodies, of an electrostatic charge
caused by direct contact or induced by an electrostatic field.
The most common cause of ESD is physical contact. Touching an object can cause a
discharge of electrostatic energy. If the charge is sufficient and occurs near electronic
components, it can damage or destroy those components. In some cases, damage is
instantaneous and an immediate malfunction occurs. However, symptoms are not always
immediate; performance may be marginal or seemingly normal for an indefinite period of
time, followed by a sudden failure.
To eliminate potential ESD damage, review the following guidelines:
• Handle boards by metal shields, taking care not to touch electronic components.
• Wear grounded wrist or foot straps, ESD shoes, or heel grounders to dissipate
unwanted static energy.
• Prior to handling boards, dispel any charge in your body or equipment by touching a
grounded metal surface.
• Ensure all components are transported and stored in static safe packaging.
• When returning boards, carefully package in the original carton and static protective
wrapping.
• Ensure ALL personnel are educated and trained in ESD control procedures.
In general, exercise accepted and proven precautions normally observed when handling
electrostatic sensitive devices. A warning label is placed on the packaging, identifying
products using electrostatic sensitive semiconductor devices.
Reference Manual Electrostatic sensitive device
00809-0100-4303 November 2020
Net Safety ST3 27