Transition Networks 48 VDC-TO-12VDC SPS-48V - Manual (Page 3)

TECHNICAL SPECIFICATIONS
Input
Input Voltage 48 VDC
Inrush Current 0.20 A (peak cold start)
Hold-Up Time 20 msec minimum at full load and nominal input
voltage
Isolation Voltage (Dielectric withstand) Meets IEC 960 for one minute.
1,500 VAC: Output/Input
500 VAC: Input/Safety GND
500 VAC: Output/Safety GND
Output
Output Voltage 12 VDC
Output Current 0.8 A
Line Regulation ±0.5 % of all output within specified range
Load Regulation ±1.0 % at 20 % load to full-rated load
Cross Regulation ±1.0 % maximum on any output change from 50 % to
100 % rated load
Transient Response Output voltage returns in less than 3 msec following a
50 % load change
Over Load Protection (OLP) When the average power rating exceeds 125%-
150% of maximum power, output voltages reduced to
a safe dissipation level; protects against short circuit of
any output.
Over Voltage Protection (OVP) 124 % ±8 % on output.
Over Circuit Protection Withstands a continous short without damage; returns
automatically to regulation upon removal of short.
No Load Operation No damage to power supply when operating at no
load.
Overshoot Protection No voltage spike at power-on, power-off, or power
failure.
4. Connect +48-VDC terminal to 48-to-12 VDC External Power Supply
terminal block control marked “+”. Turn terminal screw clockwise to
secure.
5. Connect -48-VDC terminal to 48-to-12 VDC External Power Supply
terminal block control marked “-”. Turn terminal screw clockwise to
secure.
6. Connect ground terminal to 48-to-12 VDC External Power Supply
terminal block control marked “chassis ground”. Turn terminal screw
clockwise to secure.
7. Ensure that external power source is powered ON.
GND
-
+