3
Gas
Average concentration (mg/m
3
)
Maximum concentration (mg/m
3
)
NO
X
0.5
1.0
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.
•
To prevent signal ports from getting damaged by overvoltage or overcurrent caused by lightning
strikes, route interface cables only indoors.
Laser safety
WARNING!
Disconnected optical fibers or transceiver modules might emit invisible laser light. Do not stare into
beams or view directly with optical instruments when the switch is operating.
The switch is a Class 1M laser device.
Installation tools
No installation tools are provided with the switch. Prepare the following tools yourself:
•
Phillips screwdriver.
•
ESD wrist strap.
•
Marker.
Installation accessories
Before installation, make sure you have all the required installation accessories. If an accessory is
damaged or lost, use its part No. to purchase a new one. You can find the part No. for the
accessories in
Table1-3 Installation accessories
Part No.
Description
Quantity
Applicable switch
models
2150A0H4
Mounting brackets
1 kit, provided
S9825-64D
