User Guide

Preventing Electrostatic Discharge Damage
Many Services Router hardware components are sensitive to damage from static
electricity. Some components can be impaired by voltages as low as 30 V. You can
easily generate potentially damaging static voltages whenever you handle plastic or
foam packing material or if you move components across plastic or carpets. Observe
the following guidelines to minimize the potential for electrostatic discharge (ESD)
damage, which can cause intermittent or complete component failures:
■ Always use an ESD wrist strap or ankle strap, and make sure that it is in direct
contact with your skin.
CAUTION: For safety, periodically check the resistance value of the ESD strap. The
measurement should be in the range of 1 to 10 Mohms.
■ When handling any component that is removed from the chassis, make sure the
equipment end of your ESD strap is attached to one of the electrostatic discharge
points on the chassis, which are shown in Figure 1 on page 14, Figure 2 on page
15 and Figure 13 on page 28.
■ Avoid contact between the component and your clothing. ESD voltages emitted
from clothing can still damage components.
■ When removing or installing a component, always place it component-side up
on an antistatic surface, in an antistatic card rack, or in an electrostatic bag (see
Figure 107 on page 249). If you are returning a component, place it in an
electrostatic bag before packing it.
Figure 107: Place a Component into an Electrostatic Bag
Electrical Safety Guidelines and Warnings
When working on equipment powered by electricity, follow the guidelines described
in the following sections:
■ General Electrical Safety Guidelines on page 250
■ AC Power Electrical Safety Guidelines on page 251
Safety Guidelines and Warnings ■ 249
Chapter 14: Safety and Regulatory Compliance Information