ViewPoint 8650
Quick Start Guide
2 Installation Guide
Issue 04 (2013-07-20)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
7
MCU can be connected to the power systems of TT, TN, and IT.
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2.2.3 Installing the Board
Before Installation
Since the board is vulnerable to electro-static discharge (ESD), you need adhere to the
following regulations while handling the board:
Ground the device as required.
Always wear an antistatic wrist strap during the operation.
Tighten the wrist strap around your wrist skin, and attach the other end of the wrist strap
to the grounding point of the equipment, as shown in
Figure 2-4
Wearing an antistatic wrist strap
Check the validity and functionality of the wrist strap. Its resistance should range from
0.75 megohms to 10 megohms. If the validity period (usually two years) of the wrist
strap expires or the resistance value does not meet the requirement, use a new antistatic
wrist strap.
An antistatic wrist strap cannot protect the board from the static electricity generated
when the board touches your clothes. Therefore, any contact between the board and
clothes should be prevented.
When you replace the board software or chipset, you need to use an antistatic mat. When
you pick up or plug/unplug the chipset, use antistatic nippers and a chipset extractor. The
chipsets or pins on the printed circuit board (PCB) should never be touched with bare
hands.
Keep the boards and other ESD sensitive parts to be installed in static shielding bags.
Place the removed boards and components on an antistatic mat or other antistatic
materials. Do not use non-antistatic materials such as white foams, common plastic bags,
or paper bags to pack boards or contact boards with these materials.
Wear an antistatic wrist strap when operating the ports of boards because they are also
ESD-sensitive. Discharge the static electricity of cables and protective sleeves before
connecting them to the ports.
