7
5. Connecting Power and the Network
The sensor connects to your network through its Ethernet port. This is also how the unit receives
power. The sensor can be powered by the following methods:
•
By Power Over Ethernet (PoE) supplied through the LAN by a 802.3af PoE compliant device
such as a switch or hub.
•
By PoE supplied by an optional 3Com PoE injector (not included). 3Com PoE injectors include
the 3CNJPSE and 3CNJPSE24 midspan supplies.
Power Over Ethernet (PoE) from the LAN
To power the sensor using PoE provided by a switch or other 802.3af compliant device, simply
plug the network cable from the device into the sensor’s Ethernet port.
Power Over Ethernet from a PoE Injector
To power the sensor using a 3Com PoE Injector (available separately), do the following:
1
Connect the LAN cable from the switch or hub to the Hub/Switch port on the 3Com PoE
Injector (available separately).
2
Next connect a LAN cable from the Ethernet port on the sensor to the other port on the PoE
injector.
3
Plug the PoE Injector into a properly grounded electric outlet.
PoE Switch/Hub
Sensor
3CRWX120695A
Wireles
s LAN Swit
ch WX1200
3CRWX
120695
A Wire
less LA
N Switc
h WX12
00
TO ACC
ESS POINT
TO HUB/SWIT
CH
Switch/Hub
(non-PoE)
Sensor
To Sensor
To Switch/Hub
PoE Injector
