Emi; Laser Safety; Installation Tools - HP 5920 Switch Series Installation Manual

The equipment room must also meet limits on salts, acids, and sulfides to eliminate corrosion and
premature aging of components, as shown in
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 HP 5920 and 5900 switches are Class 1 laser devices.

Installation tools

Phillips screwdriver
•
• ESD wrist strap
All these installation tools are user supplied.
Table 3.
Maximum concentration (mg/m
0.2
0.006
0.05
0.01
4
)
3