I-Bus 0818D, User Manual

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Chapter 2 - Specifications
0818D User’s Guide 2-5
2.2.3 DC Input Power Modules
These modules control the 800 watts required by the power supplies
to provide 600 watts of computer power for the N+1 redundant
requirement. The input voltage range of the DC modules is less than
the 36 to 72V range of the power supplies. This assures that a power
transfer occurs within the operating range of the power supplies.
Each DC input module provides a differential sense amplifier
that will provide a ground referenced 0 to +5V output for 0 to
+72V input.
Applying the input voltage in the reverse polarity will cause the input
circuit
breaker to trip.
Each DC module panel has three LED indicators.
Power Good The applied input is between 37 and 69
Vdc.
Active The module is supplying power to the
system.
Thermal Fault The system has shut off due to
over temperature.
•
Input Voltage:
Start Voltage:
41V Min. 43V Max.
Under voltage Cutoff: 36.5V Min. 37.5V Max.
Over voltage Cutoff:
67V Min. 70V Max.
•
Input Current: 25A Maximum at full load
50mA Maximum in standby mode
•
Transfer Time: Less than 100 microseconds
•
Input Termination: Panel mounted 3-terminal barrier strip
(+, -, Gnd)
•
Input Protection: One single pole 25A circuit breaker in
the negative lead and a 30A fuse in the
positive lead.
2.2.4 Backplane
•
The backplane portion of the system incorporates I-Bus
proprietary cPCI monolithic backplane.