Electrostatic discharge

Overview

Electrostatic discharge (ESD) (for example, caused by touching with the hand) can destroy semiconductor components. The correct operation of the complete system is then no longer assured.

ESD warning
DANGER 

NOTICE

ESD hazard

ESD can destroy electronic components.

Always keep circuit packs in antistatic covers. Use the original packaging if possible. Use a static ground wrist strap whenever handling circuit packs or working on the Alcatel-Lucent 1665 DMX system to prevent ESD damage to sensitive components.

All semiconductor components are basically sensitive to ESD. The ESD can also affect the components indirectly.

ESD considerations

This section describes the precautions required to prevent ESD damage.

Circuit pack handling precautions

Industry experience has shown that all integrated circuit packs can be damaged by static electricity that builds up on work surfaces and personnel. The static charges are produced by various charging effects of movement and contact with other objects. Dry air allows greater static charges to accumulate. Higher potentials are measured in areas with low relative humidity, but potentials high enough to cause damage can occur anywhere.

Observe the following precautions when handling circuit packs/units to prevent ESD damage.

Important!

Ensure that any connectors on the shelf interconnection panel that are not cabled are fitted with a plastic dust cap to provide ESD protection.

Static control wrist straps

To reduce the possibility of ESD damage, the Alcatel-Lucent 1665 DMX shelf is equipped with an ESD grounding jack to enable personnel to ground themselves using wrist straps [ Figure 1-2, Static control wrist strap], while handling circuit packs or working on the shelf. Check the wrist straps periodically with a wrist strap tester to ensure that they are working properly.

Figure 1-2: Static control wrist strap
Static control wrist strap

Important!

The grounding jack is located on the front of the shelf, on the lower-right corner. Another grounding jack is also located on the rear panel.

Barred-hand symbol

Circuit packs containing components that are especially sensitive to ESD are identified by warning labels bearing the barred-hand symbol. The following figure shows the barred-hand symbol.

Figure 1-3: ESD warning label (barred-hand symbol)
ESD warning label (barred-hand symbol)
November 2011Copyright © 2011 Alcatel-Lucent. All rights reserved.