Nitek ER1651U - Manual (Page 5)

Installation & Setup
Equipment Requirements & Mounting: The process for employing the ER1651U is rather quick and simple. A
common topology involves up to sixteen (16) existing Twisted Pair cables up to 500m/1,600ft, up to sixteen (16)
ET1551U transmitters, up to sixteen (16) IP cameras or other peripheral network devices. The ET1551U transmit-
ter is both 802.3af and 802.3at compliant, in conjunction with a PS48 power supply. That is it produces 15.4W of
802.3af as well as 25.4W of 802.3at PoE+ power for proper attached device operation.
The method for facilitating Ethernet communication over twisted pair cable starts with connecting the ER1651U
with up to sixteen (16) twisted wire pairs via the four plug-in terminal blocks. The IP camera / PD establish connec-
tivity to ET1551U via RJ45 jacks and a CAT5e/CAT6 patch cords. The ER1651U powers itself and all attached
ET1551U transmitters, providing that the IP devices are self powered. In case of the IP device not having its’ own
power source, a PS48 power supply must accompany the corresponding ET1551U transmitter. The IP data from
the PD is transmitted from the ET1551U over each individual Twisted Pair cable to the rack mounted ER1651U.
The aggregate PD data is transmitted to the greater LAN or WAN via the gigabit LAN port labeled and located on
the back of the NITEK PSE. The ER1651U is a Layer 2 switch and with 1 “smart” LAN port. If the Trouble LED is
flashing slowly it will indicate that the network has a loop in it and data is cascading.
Upon power up the devices will undergo initialization and auto-configuration processes (also see LED Indicator
chart on page 7) which may take a number of seconds (time variations are device/installation/topology parameter
dependent) to complete before PoE and Ethernet communication commences. For optimal performance referring
to the PoE/distance chart and adhering to the IP camera/PD operational specifications is recommended. If issues
arise during the installation process please see the “Trouble Shooting Tips” section. You may also contact our web
based live tech support at:
www.nitek.net or call 1-(800)528-4343 USA or 1-(847)259-8900 (other) in order to
speak with one of our engineers directly.
The diagram below shows a common network topology.
Installment Topology