Section 150-431-114
Release 01
Page 36
C. APPLICATIONS USING HIGAIN DOUBLERS
(HDU-451)
17. GENERAL
17.01
For doubler applications, one or two doublers
may be used in the HDSL loops between the
HLU-431, List 1D and the HRU-412. The HLU-431, List
1D can line power two doublers and the remote unit (three
spans). This feature is only available when using the
HDU-439, 437, List 1 "mini" doublers and the HRU-412,
List 8 remote unit in HDU-431, List 1D circuits. It is also
available when using configurations 22 or greater of the
HRU-410, List 6, and configurations 16 or greater of the
HRU-412, List 7.
For additional information on the "mini" doublers, please
refer to its technical practice #150-439-100-01. This
section addresses HLU-431, List 1D operation with the
HDU-451 List 1, 2, 3, & 4 or the HDU-439, 437 "mini"
doublers. The List 1 and 2 doublers have identical power
consumption factors. The List 3 and 4 units are low power
doublers, and consume 40% less power than List 1 or 2.
The power consumption section addresses both the high
and low power doubler versions.
18. POWER CONSUMPTION
18.01
The maximum current drain is the current drawn
from the shelf power supply when it is at
minimum voltage (-42.5 Vdc) under a worst case
application. The worst case application for the HLU-431,
List 1D occurs on a loop with one HDU doubler, four 9000
ft, #26 AWG spans, and an HRU-412 that is providing 60
mA of CPE current. Under these conditions, the HLU-
431, List 1D current drain from the -42.5 VDC battery is
0.8 A for the List 1 and 2, and 0.58 A for the List 3 and 4
doublers. This CO current and other related power
parameters for this doubler application are listed in Table
11. The worst case loop conditions assumed for the 3 span
line powering applications listed in Tables 11 and 12 are a
2000 ohm total loop consisting of 9000 ft., #26 AWG for
span 1 and 2, and 6000 ft., #26 AWG for span 3.
TABLE 11. HLU-431, LIST 1D POWER PARAMETERS WITH HDU DOUBLERS, LIST 1, 2 3 & 4 and MINI
60 mA CPE
Current
CO Voltage
Volts
CO Current
Amps
List 1, 2
CO Current
Amps
List 3, 4
CO Current
Amps
3 span line
Powering
Power
Consumption
Watts
List 1, 2
Power
Consumption
Watts
List 3, 4
Mini
Power
Consumption
Watts
3 span line
Powering
HLU Power
Dissipation
Watts
List 1, 2
HLU Power
Dissipation
Watts
List 3, 4
Mini
HLU Power
Dissipation
Watts
3 Span Line
Powering
OFF
42.5
0.65
0.50
0.8
28
22
34
8.5
8.25
9.0
OFF
48.0
0.59
0.41
0.7
28
22
34
8.5
8.25
9.0
OFF
56.0
0.50
0.38
0.6
28
22
34
8.5
8.25
9.0
ON
42.5
0.80
0.58
n/a
34
25
n/a
9.0
8.5
n/a
ON
48.0
0.70
0.52
n/a
34
25
n/a
9.0
8.5
n/a
ON
56.0
0.60
0.43
n/a
34
25
n/a
9.0
8.5
n/a
