ET
15
51
U
ET1
551U
Powe
r Supp
ly
NITEK PS48
Network Switch,
NVR or Server
LAN
115/230
VAC
ET1551U
Power Supply
At the camera location securely mount the transmitter.
Find the twisted pair cable from the head-end and make sure it is properly terminated. Connect the wires of the
twisted pair cable to the “Link Port” of the transmitter, beware of the polarity of the connection. If the Head-end unit
is powered up it will sense the connection to the transmitter unit and turn on the power. This will be indicated by the
green POWER LED on the “Network Port”. After several minutes the green 10/100 (upper) LED at the “Link Port”
will turn-on to tell you that the Head-end has connected with the transmitter unit. The camera does not need to be
connected for the transmitter to communicate with the Head-end.
Finally, connect a camera or other Ethernet device to the transmitter “Network Port”. The IP camera or other
Ethernet device should now be ready to operate. If the camera needs PoE power please refer to the next section for
how to power the ET1551 when PoE power is needed.
Otherwise continue installing the remaining transmitters as
needed.
Note: The Head-end unit is only designed to supply power for the ET1551U transmitter unit. While some
cameras at short distances may operate with PoE form the head-end unit, it maybe insufficient for
Transmitter Hookup Diagram
Connector
LED
OFF
ON
FLASHING
Network
Port
Power No
power
Power
Good
Link
Status
No Ethernet
Link
Ethernet
Link
Good
Link
Port
PoE Out
No PoE
Power Out
PoE Power
Good
10/100
No Link
100Mb
10Mb
LED INDICATORS
Simplified System Hookup Diagram
Transmitter-end Installation
ET1551U Units System
IP Camera
IP Camera
Twisted Pair from
Head-end
Link Port
Network Port
IP Camera
Network Switch,
NVR or Server
