Emi; Laser Safety - NEC QX-S6648XP-6Q Installation Manual

Installation Guide
QX-S6600 Series Ethernet Switches
SO
2
H S
2
NH
3
Cl
2

EMI

All electromagnetic interference (EMI) sources, from outside or inside of the switch and
application system, adversely affect the switch in a conduction pattern of capacitance
coupling, inductance coupling, electromagnetic wave radiation, or common impedance
(including the grounding system) coupling. To prevent EMI, take the following actions:
Please take the effective measures to reduce the intervention the power supply

system exerts on the switch.
Keep the switch far away from high-power radio launchers, radars, and equipment

with high frequency or high current.
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.
Route interface cables only indoors to prevent signal ports from getting damaged by

overvoltage or overcurrent caused by lightning strikes.

Laser safety

The QX-S6600 Series switches are Class 1M laser devices.
Table 2-2 Harmful gas limits in the equipment room
Gas
0.2
0.006
0.05
0.01
Maximum concentration (mg/m3)
2-4
2 Preparing for installation