Eberle Design PS2248-HV Operation Manual - page 3
PS2248-HV Cabinet Power Supply
Operations Manual
Eberle Design Inc.
Page 1
1.1 OVERVIEW
The PS2248-HV Cabinet Power Supply series is a 1U high 19” rack mounted high
efficiency switching power supply for the Advanced Transportation Controller Cabinet
(ATCC). The PS2248-HV model provides a main 48VDC output intended for field signal
loads, and an isolated 24VDC output for internal cabinet peripherals. The PS2248-HV
Cabinet Power Supply is intended to power ATC Cabinets operating with DC powered low
voltage (48 VDC) Output Assemblies (LV).
The PS2248-HV series provides output regulation across changes in AC Line voltage and
output load over the full NEMA operating temperature range of -34C to +74C. Power Factor
Correction is also provided reducing peak AC Line input current and associated stress on
wiring. The outputs are protected against voltage transients by a 1500 Watt suppressor.
1.2 INDICATORS
A green LED indicator is provided to display AC Line input status and fuse integrity.
Separate green LED indicators are provided to display output status and fuse integrity for
each DC output.
1.3 SPECIFICATIONS
1.3.1 AC POWER REQUIREMENTS
AC Operating Voltage ..................................................................................... 90 to 270 Vac
AC Operating Frequency .................................................................................. 45 to 65 Hz
Maximum Input Current (85 Vac) ...............................................................................6 Amps
Power Factor (120 Vac at full load) ................................................................................. 0.98
Maximum Input Surge ............................................................................................ 50 Amps
1.3.2 DC OUTPUTS
Total DC Output Power (**see Table below) ......................................................... 450 watts
48VDC Output Voltage .............................................................................. 48 Vdc +/- 2 Vdc
48VDC Output Current Maximum ............................................................................... 8 Amp
24VDC Output Voltage .............................................................................. 24 Vdc +/- 2 Vdc
24VDC Output Current Maximum ..............................................................................5 Amps
DC Output Ripple Maximum ................................................................................ 500 mVpp
Note: Ripple is measured at 20MHz of bandwidth using a 12" twisted pair-wire
terminated with a 0.1uf & 47uf capacitor.
Maximum Power-up time (110 Vac, -34
o
C) ................................................1000 milliseconds
Minimum Holdup Time (450 Watts DC Output Load) ................................... 50 milliseconds
1.3.3 MECHANICAL
Rack Height .................................................................................................. (1U) 1.7 inches
Rack Width ........................................................................................................ 19.0 inches
Depth ................................................................................................................ 7.40 inches
**PS2248 DC Power Rating
The total DC output power must be limited to 450 watts total.
The DC output power is calculated as:
P = 48*I
48
+ 24*I
24
Where I
xx
is the maximum output current supplied from each
DC output; 48V and 24V.