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Table 3 Harmful gas limits in the equipment room
Gas
SO
2
H
S
2
NH
3
Cl
2
EMI
Electromagnetic interference (EMI) might be coupled from the source to the switch through the following
coupling mechanisms:
Capacitive coupling
•
Inductive coupling
•
•
Radiative coupling
Common impedance coupling
•
Conductive coupling
•
To prevent EMI, take the following actions:
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 to make sure the EMI levels do not exceed the compliant range.
Use electromagnetic shielding, for example, shielded interface cables, when necessary.
•
•
To prevent signal ports from getting damaged by over-voltage or over-current caused by lightning
strikes, only route interface cables indoors.
Laser safety
WARNING!
Do not stare into any fiber port when the switch has power. The laser light emitted from the optical fiber
might hurt your eyes.
The switch is a Class 1 laser device.
Installation tools
The installation tools are not provided with the switch. Prepare them yourself.
Phillips screwdriver
•
ESD wrist strap
•
•
Marker
Maximum concentration (mg/m
0.2
0.006
0.05
0.01
4
3
)
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