Chapter 2
Electrostatic Discharge Awareness
Summary
All electronic equipment is static-sensitive, some components more than others. To protect
these components from static damage, you must take special precautions to minimize or
eliminate electrostatic discharges.
General Information
Follow these precautions when working with or near the control.
1. Before doing maintenance on the electronic control, discharge the static electricity on your
body to ground by touching and holding a grounded metal object (pipes, cabinets,
equipment, etc.).
2. Avoid the build-up of static electricity on your body by not wearing clothing made of
synthetic materials. Wear cotton or cotton-blend materials as much as possible because
these do not store static electric charges as much as synthetics.
3. Keep plastic, vinyl, and styrofoam materials (such as plastic or styrofoam cups, cup
holders, cigarette packages, cellophane wrappers, vinyl books or folders, plastic bottles,
and plastic ash trays) away from the control, the modules, and the work area as much as
possible.
4. Do not remove the printed circuit board (PCB) from the control cabinet unless absolutely
necessary. If you must remove the PCB from the control cabinet, follow these precautions:
• Do not touch any part of the PCB except the edges.
• Do not touch the electrical conductors, the connectors, or the components with
conductive devices or with your hands.
• When replacing a PCB, keep the new PCB in the plastic antistatic protective bag it
comes in until you are ready to install it. Immediately after removing the old PCB from
the control cabinet, place it in the antistatic protective bag.
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