150-388-125-01, Revision 01
Appendix C - Functional Operation
HLU-388 List 2E
September 15, 1998
53
Power Consumption: With Doublers
for CO current and other related power parameters for various doubler applications.
The worst case conditions, under which these parameters were measured, include a 9,000 ft.,
AWG 26 loop, 60 mA of Customer Provided Equipment (CPE) current, a fully loaded 28-slot
shelf, and a -42.5 V shelf battery voltage with the HLU-319 4-character display “OFF.” For the
purpose of comparison, the HLU-319, List 1 unit dissipates 8.5 Watts and consumes 18 Watts
per slot under similar worst case conditions.
Table 15.
HLU-388 Power Parameters With HDU-451
60 mA CPE
Current
CO Voltage
Volts
CO Current
Amps
Power
Consumption
Watts
HLU Power
Dissipation
Watts
HDU Doubler Models
OFF
42.50
0.50
21.5
8
HDU-451, List 1-4, 4B
HDU-439/437 List 1, 1B
OFF
48.00
0.44
21.5
8
HDU-451, List 1-4, 4B
HDU-439/437 List 1, 1B
OFF
56.00
0.38
21.5
8
HDU-451, List 1-4, 4B
HDU-439/437 List 1, 1B
ON
42.50
0.6
25.5
9
HDU-451, List 3, 4, 4B
HDU-439/437 List 1, 1B
ON
48.00
0.53
25.5
9
HDU-451, List 3, 4, 4B
HDU-439/437 List 1, 1B
ON
56.00
0.45
25.5
9
HDU-451, List 3, 4, 4B
HDU-439/437 List 1, 1B
The worst case conditions, under which these parameters were measured, include a loop with
one HDU-451 List 1 doubler, four 9000-foot #26 AWG spans, and an HRU-412 that is providing
60 mA of Customer Provided Equipment (CPE) current.
