Noisy DC Power Can Cause Unpredictable CompactRIO Operation Hardware: CompactRIO>>Controllers>>cRIO-9004, CompactRIO>>Controllers>>cRIO-9002, CompactRIO>>Controllers>>cRIO-9012, FieldPoint>>Controllers/Network Modules>>FP-1600, FieldPoint>>Controllers/Network Modules>>FP-1601, FieldPoint>>Controllers/Network Modules>>FP-2000, FieldPoint>>Controllers/Network Modules>>FP-2010, FieldPoint>>Controllers/Network Modules>>FP-2015
Problem: My CompactRIO System is behaving in an unexpected manner. Sometimes it reboots randomly or even fails to boot at all. It is powered off a vehicle's power supply. What is happening? While the CompactRIO has a robust power supply, clean DC power is required for reliable operation. Check your DC power source on an oscilloscope. If the power looks like anything other than a flat line at the DC voltage, then power conditioning may be required. Also, monitor the power while performing current-intensive operations, such as starting the vehicle or running large electrical devices. These can introduce transients onto the DC power bus that can cause intermittent CompactRIO operation. Noisy power is especially common in automotive, aeronautical, and industrial applications where large inductive loads (e.g. electric motors) are using the same power supply. To correct for noisy power, try installing a DC-DC converter which will isolate the CompactRIO as well as smooth out transients in the power supply. The CompactRIO 9002 and 9004 are rated from 9-30VDC for start-up operation, and 6-30VDC to maintain operation.
Report Date: 06/15/2006 Last Updated: 10/19/2006 Document ID: 3YE79MJ8 |
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