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NetSure DC/DC Converter Module User Manual (UM1C24481500 / 11WA6101WB)
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Rev. G
7
INTRODUCTION
Overview
The C24/48-1500 is a compact DC/DC converter module which offers efficient power conversion. It operates
from a n24 VDC source to provide nominal -48 VDC load power.
Specifications
DC Output Ratings
•
Voltage: Nominal –48 volts DC, positive ground. Output voltage is adjustable from 48.0 to 55.5 volts DC
via the associated controller.
•
Nameplate Rating:
a)
48 - 52 Vdc, 31.25 - 28.9 A, 1500W max. @ 50°C.
b)
48 - 52 Vdc, 25 - 23 A, 1200W max. @ 65°C.
•
Regulation:
a)
Static: Steady state output voltage remains within ±1% of the pre-adjusted voltage for any load
current from no load to full load and over the specified input voltage range.
b)
Dynamic: For any load step change within the range of 20% to 100% of full rated current, the
maximum voltage transient will not exceed 5% of the initial steady state voltage.
•
Filtering: With at least 10% of rated full load on the output (-20°C to +65°C).
a)
Voice band noise is less than 32 dBrnC (for more than one converter module) or 40 dBrnC (for a
single converter module) when measured with a noise meter using 600 ohm bridged input and
C-message weighting.
b)
Wide band noise does not exceed 250 millivolts peak to peak over the frequency range of 0 Hz to
100 MHz.
c)
Wide band noise does not exceed 50 millivolts rms over the frequency range of 0 Hz to 100 MHz (as
measured with an HP3400A true rms voltmeter).
d)
Noise below –20°C is slightly higher.
DC Input Ratings
•
Voltage: Nominal 24 volts DC.
•
Nameplate Rating: 20.5 - 30 VDC, 87 - 59 A.
•
Inrush Current: The peak value of the inrush current does not exceed 2 times the maximum steady-
state RMS input current at 25°C and does not trigger the unit’s internal input fault protection device.
•
Filtering: Noise reflected back to the central office battery is within the parameters set forth in Telcordia
Technical Reference TR-TSY-000009, paragraph 5.0, using test measurements in Telcordia Technical
Reference PUB 43802, pages 5 and 6.
