Nitek EL1551U - Manual (Page 3)

Parts of the EL1551U
Wire and Cable Recommendations: The EL1551U is designed for use with copper based 24AWG
Twisted Pair (CAT3 or CAT5) cable. Other heavier gage wires are possible but the wire must be a
twisted paired cable. The RJ45 network port pin out schemes shall be in accordance with the 568B
standard. The quality of which must be consistent with any reasonably serviceable cable condition.
Cables should be free from damage as in cuts, breaks, or cracks to the outer covering and insulated
shielding which may compromise the signal conductivity of the cable.
For more specific information regarding wire types, gauges, and proper installation techniques
please call Tech Support at (847)259-8900 or (800)528-4343.
Ethernet: The EL1551U is designed to transmit and receive up to 100Mbps of Ethernet data to a
maximum distance of 1,600ft / 500m. Before considering this solution be sure that the cable involved
does not exceed the recommended maximum lengths. If the cable distance value is undetermined at
the time of installation, we recommend the use of a Time Domain Reflectometer (TDR) or other
method to determine the unknown cable distance estimates.
Installation Considerations
UTP Side of Device Network Port Side
10/100 Link LED Indicator
• On Solid = 100Mb
• Flashing = 10Mb
• Off = No Link Link Status LED Indicator
• On Solid = Ethernet Link
• Off = No Ethernet Link
Power LED Indicator
• On Solid = The Unit is powered
and ready to use
• Off = The unit is not powered
PoE Out LED Indicator
• On = PoE is being provided
out the network port
• Off = PoE is “not” being sent
out the network port
UTP Connector
• Attaches to twisted
pair wires
Optional Power Input
• Class II 48-56VDC input to create PoE
in installations where a PoE switch is
not available.
• On Receiver used to power the system
when a PoE switch is not available.
• On Transmitter used to provide greater
PoE power out the network port.