Installation Guide
QX-S6600 Series Ethernet Switches
2-4
Table 2-2
Harmful gas limits in the equipment room
Gas
Maximum concentration (mg/m3)
SO
2
0.2
H
2
S
0.006
NH
3
0.05
Cl
2
0.01
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.
