5460-842 WOODWARD

Damage from electrostatic discharge

• All electronic equipment sensitive to damage from electrostatic •

discharge, which can cause the control unit to malfunction or fail.

• To protect electronic components from static damage, take the •

precautions listed below.

1. ▷ Avoid 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 easily as synthetics.

2. ▷ Before working on terminals on the control unit, ground yourself by touching

and holding a grounded metal object (pipes, cabinets, equipment, etc.) to

discharge any static electricity.

Alternatively wear an ESD wrist band connected to ground.

3. ▷ Before any maintenance work on the control unit, ground yourself by

touching and holding a grounded metal object (pipes, cabinets, equipment,

etc.) to discharge any static electricity.

Alternatively wear an ESD wrist band connected to ground.

4. ▷ Keep plastic, vinyl, and Styrofoam materials (such as plastic or Styrofoam cups,

cigarette packages, cellophane wrappers, vinyl books or folders, plastic bottles, etc.)

away from the control unit, modules and work area.

5. ▷ Opening the control cover may void the unit warranty. Do not remove the printed circuit

board (PCB) from the control cabinet unless instructed by this manual.

If instructed by this manual to remove the PCB from the control cabinet,

follow these precautions:

•• Ensure that the device is completely voltage-free (all connectors have

to be disconnected).

•• Do not touch any part of the PCB except the edges.

•• Do not touch the electrical conductors, connectors, or components with

conductive devices or with bare 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.

For additional information on how to prevent damage to electronic components caused

by improper handling, read and observe the precautions in:

•• "Woodward manual 82715, Guide for Handling and Protection of Electronic Controls,

Printed Circuit Boards, and Modules