4
ESD prevention
CAUTION:
Check the resistance of the ESD wrist strap for safety. The resistance reading should be in the range
of 1 to 10 megohm (Mohm) between human body and the ground.
To prevent electrostatic discharge (ESD), follow these guidelines:
•
Make sure the router and the floor are well grounded.
•
Take dust-proof measures for the equipment room.
•
Maintain the humidity and temperature at a proper level.
•
Always wear an ESD wrist strap and ESD cloth when touching a circuit board or transceiver
module.
An MSR3000 router does not supply an ESD wrist wrap. Prepare an ESD wrist wrap yourself.
•
Place the removed memory module, CF card, or interface module on an antistatic workbench,
with the face upward, or put it into an antistatic bag.
•
Touch only the edges, instead of electronic components when you observe or move a removed
memory module, CF card, or interface module.
To attach an ESD wrist strap:
1.
Wear the wrist strap on your wrist.
2.
Lock the wrist strap tight around your wrist to keep good contact with the skin.
3.
Insert the ESD plug into the ESD socket.
4.
Make sure the rack is well grounded.
EMI
All electromagnetic interference (EMI) sources, from outside or inside of the switch and application
system, adversely affect the switch in the following ways:
•
A conduction pattern of capacitance coupling.
•
Inductance coupling.
•
Electromagnetic wave radiation.
•
Common impedance (including the grounding system) coupling.
To prevent EMI, use the following guidelines:
•
If AC power is used, use a single-phase three-wire power receptacle with protection earth (PE)
to filter interference from the power grid.
•
Keep the switch far away from radio transmitting stations, radar stations, and high-frequency
devices.
•
Use electromagnetic shielding, for example, shielded interface cables, when necessary.
Lightning protection
To better protect the router from lightning, do as follows:
•
Make sure the grounding cable of the chassis is well grounded.
•
Make sure the grounding terminal of the AC power receptacle is well grounded.
•
Install a lightning arrester at the input end of the power supply to enhance the lightning
protection capability of the power supply.
Содержание FlexNetwork MSR3012
Страница 5: ...iii Index 80 ...
Страница 25: ...20 Figure 22 Grounding the router through the grounding terminal on the rack ...
Страница 48: ...43 Figure 57 MSR3024 internal module locations 1 Front panel 2 Rear panel 3 VPM 4 Memory module ...
Страница 49: ...44 Figure 58 MSR3044 internal module locations 1 Front panel 2 Rear panel 3 VPMs 4 Memory module ...
