Data Sheet

2 143D-NSDCS375 / 0912
EmersonNetworkPower.com/EnergySystems (North America)
EmersonNetworkPower.eu/EnergySystems (EMEA)
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DCS 48375
1500 Watt Converter Module
Specifications
Input
Voltage
24.0 volts DC nominal, with range of 20.5 to 30.0 volts DC
Current
83.3 amps maximum (at full load for one module, 21VDC input)
Circuit Protection
Fuse is located in the positive input lead of each converter module
Filtering Noise reflected back to the battery is less than 32dBrnC and is within the parameters set
forth in Telcordia technical reference TR-TSY-000009, using test measurements in
PUB43802, pages 5 and 6
Efficiency
90.8% typical
Output
Voltage
-48.0 VDC, -50.0 VDC, -52.0 VDC and -54.0 VDC selectable
Current 31.25 amps per DC-DC converter module, up to a total of 125 amps per shelf
with four modules installed.
Regulation Steady state output voltage remains within ±1% of the pre-adjusted voltage for any load cur-
rent from no load to full load and over the specified input voltage range
Dynamic Response For a step load 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 Voice band noise is less than 32dBrnC. Wide band noise does not exceed 250 mV peak to
peak over the frequency range of 0 to 100 MHz. Wide band noise does not exceed 50 mV
rms over the frequency range of 0 Hz to 100 MHz.
Protection
Overvoltage Each DC-DC converter module will automatically shut down and lock out should its output
voltage exceed 115% to 125% of nominal voltage. Manual restart is necessary after the over-
voltage condition is corrected.
Overcurrent When the output current of a DC-DC converter module increases to a preset value between
102.5% to 115% of rated full load, the output voltage of the module will automatically
decrease to limit current to this value. The output will recover to within specified limits when
the overload condition is removed.
Over Temperature Each DC-DC converter module will automatically shut down if the internal temperature of
the module exceeds a predetermined value. Operation will automatically resume after the
over-temperature condition is removed.
Status/Alarm Indicators
Shelf
Minor alarm LED (yellow) and form-C contact for a single DC-DC converter module failure
Major alarm LED (red) and form-C contact for two or more DC-DC converter module failures
Input OK LED (green) if the input voltage source is within operating limits
Fuse alarm (red) and form-C contact if any GMT load fuse opens
E Stop RTN signal will shut down all converter modules
Test points for output current and output voltage
Module Output OK LED (green) if output voltage is between the low and high voltage alarm limits
and fan is operating normally.
Environmental
Operating Temperature
-40°C to +65°C (-40°F to +149°F), power derated to 80% at 65°C (149°F)
Storage Temperature
-40°C to +85°C (-40°F to +185°F)
Humidity
0% to 95% relative humidity, non-condensing
Altitude Maximum operating ambient temperature should be derated linearly
(3°C per 1000 ft.) at elevation above 5000 ft.
Audible Noise The audible noise at any point 2 ft. from any vertical surface of the shelf shall not exceed
60dB-A per ANSI S1.4.
EMI/RFI Suppression This unit conforms to the requirements of FCC Part 15, Subpart B, Class B; EN55022, Class B
for radiated and conducted noise; and GR-1089 CORE for conducted noise.