50 Keysight PXIe Chassis Family User Guide
Power Supply Operation Power Supply Capacity
Power Supply Capacity
Figure 16 on page 51 shows the maximum power (in Watts) available from each
Primary Power Module (PPM) Voltage Rail. The rails cannot provide their
maximum power simultaneously to the modules in the chassis. Hence, trade offs
are required to ensure that certain maximum power limits are not exceeded.
The total amount of power available from the PPM depends on the AC voltage.
For example, for the M9019A chassis at low line AC (100/120V), the total power
drawn from the PPM cannot exceed 650 W; at high line AC (220/240V), the total
power drawn from the PPM cannot exceed 800 W.
Temperature Derating of the Primary Power Module
In general, the total power output of the PPM does not derate with temperature.
However, the output current of each rail derates linearly with temperature and
with altitude, as specified in the chassis data sheet. For more information on the
latest power supply specifications and temperature derating information, see the
chassis data sheet available at any of the chassis web pages.
www.keysight.com/find/M9010A
www.keysight.com/find/M9018B
www.keysight.com/find/M9019A
Power Calculator Spreadsheet
Power calculator spreadsheets are available on-line on the web pages of each
PXIe chassis. These spreadsheets allow you to enter the following information
and determine if the chassis will be operating within its power limits:
– The ambient temperature where the chassis will be operating. The ambient
temperature affects the power available to the modules from the power
supply, as noted in the previous section.
– The mains voltage of the chassis, either low line (100/120V) or high line
(220/240V).
– The power consumed from each rail by each module.
– Operating Altitude
After the above information is entered, the spreadsheet indicates if any power
supply limits are exceeded.
The Power Calculators are available at www.keysight.com/find/M9019A (for the M9018B
and M9019A chassis) or www.keysight.com/find/M9010A for the M9010A chassis).
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