1-6
Category
Definition
Example
B2: harsh
environment
•
Unshielded places where the
temperature and humidity are not
controlled.
•
Sea environments or outdoor land
environments near pollution sources.
Islands, ships, and completely
exposed outdoor places near
pollution sources.
C: special
environments
Special application environments
Buried, underwater, or undersea
environments and manholes.
Table1-6 Pollution sources
Category
Radius range
Saline water areas such as oceans and saline lakes
≤ 3.7 km (2.30 miles)
Serious pollution sources such as metallurgic plants, coal mines, and
heat and power plants
≤ 3 km (1.86 miles)
Medium pollution sources such as chemical factories, rubber plants,
and electroplating factories
≤ 2 km (1.24 miles)
Light pollution sources, such as food factories, tanneries, and
heating boilers
≤ 1 km (0.62 miles)
Checking power distribution or power supply
environment
Table1-7 Requirements for power distribution or power supply environment
Item
Requirements
Preparation
The power supply must be available before you install the switch.
Voltage
The voltage provided to the switch must be within the operating voltage range.
For the operating voltage range, see
H3C S1850-X & S1850V2-X & S1850V2-EI
Switch Series Hardware Information and Specifications
.
Power receptacle and
cables
•
If the external power supply system provides an AC power outlet, use a
country-specific AC power cord. Make sure the PE wire of the AC power
supply is grounded reliably.
•
If the external power supply system provides a DC distribution box, prepare
DC power cords yourself.
•
Do not use the power cord provided with the switch on other devices.
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 1 laser device.
