iPECS UCM - UCM-PSUD (DC;DC Power Supply Unit)

iPECS UCM
Installation Manual Issue 1.1
19
2.2.3.1.3 UCM-PSUD (DC/DC Power Supply Unit)
The UCM-PSUD (DC/DC Power Supply Unit) is installed on the UCM-MGC3 in a redundancy configuration. It
converts DC -48V received from the rectifier to DC +5V.
Figure 2-15 UCM-PSUD
Electrical characteristics
 Rated input voltage: DC -48V
 Input voltage range: DC -44V ~ -58V
 Rated output
Rated
Output Voltage
Max.
Load Current
Line
Regulation
Load
Regulation
Ripple / Noise
mVp-p(max)
DC +5.0V 30A ±0.1V ±0.2V 50/100mVp-p
Over-current protection
The output current is restricted to 110% ~ 140% of the maximum output current within the input voltage
range.
Over-voltage protection
When +5V output is DC +5.5V ~ DC +7.0V, the over-voltage protection function is enabled to shut down
the output and it is enable to block the input power.
Output short-circuit protection
Alarm functions(Status indication LED)
 Input -48V
 Output +5V
 Output low voltage indication
 FAN fault indication