Cisco 1552 Series, Руководство по установке

Страница: 85 / 139

3-71
Cisco Aironet 1552 Series for Hazardous Locations Installation Guide
Chapter 3 Installing the 1552 Series Access Points in Hazardous Locations
Powering the Access Point
Powering the Access Point
Warning
Explosion Hazard—The area must be known to be nonhazardous before installing, servicing, or
replacing the unit.
Statement 1082
Note
Please refer to the Declarations of Conformity and Regulatory Information when the
AIR-CAP1552H-Q-K9 (POE input configuration only) will be installed in an explosive area in Japan.
The access point can be powered by one of these methods:
1552H and 1552SA
100 to 240 VAC, 50-60Hz.
1552H
Power-over-Ethernet (PoE)—56 VDC power injector (AIR-PWRINJ1500-2=)
1552SD and 1552WU
24 VDC
Note In all cases above, the AC branch circuit powering the access point must be limited to no more than 20A
from the over-protection device supplied by the user. This branch power protection must meet all local
and national electrical codes.
The 1552 access point for hazardous locations can be connected to more than one power source. The
access point detects the available power sources and switches to the preferred power source using the
following priority:
1.
AC power
2. DC power
3.
Power over Ethernet
Connecting a 1552H Series Power Injector
The power injector provides 56 VDC to the access point over the Ethernet cable and supports a total
end-to-end Ethernet cable length of 100 m (328 ft) from the switch to the access point.
Note
The power injector is not intended to be installed in a hazardous locations environment. If a PoE injector
is required, it must be located in a non-hazardous location environment.
Note The 1552SA/SD and 1552WU do not support PoE In.