Installation Manual

Installation Manual
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CMA-794-AEN
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Page 6
Figure 1. Hybrid Cable Configuration
E62-N2RU POWER SUPPLY
The E62-N2RU needs a DC power supply at the remote unit location. A power supply unit (PSU)
can be used to supply this DC power.
These are the specifications for DC power cables for use with the 56V PSU:
Pn = 78 W Power consumption of E62-N2RU P= I*Vin = 142.92W Power required from PSU
Vin = 56 V Voltage of E62-N2 PSU
Rw= (Vin-Vout)/I =
6.90
Rw = resistance of the wire
Vout = 48*(1-20%) =
38.4 V
Minimum input voltage of E62-
N2RU
Rw = Rd*D
D = distance of the wire (total length of
supply + return cable)
Rd = resistance per meter of the wire
I= Pn/Vout = 2.552A I = Injected current
Cable
type
Voltage Drop D=Rw/Rd (meters) Max Fiber Distance (meters)
ohms/meter 2x distance between PSU and N2RU (there and back) Distance between PSU and N2RU
12 AWG 0.00557 1238 619
14 AWG 0.00928 743 372
16 AWG 0.0147 469 235