[c-nsp] 720x VXR -12V Sensor

[roy]

Thanks Matt and Brian.

This indeed seem to be an I/O controller issue (although the CCO docs 
say the sensors are on the PSU and the engine was supposed to process 
them). I've tried swapping I/O controllers keeping the rest of the 
hardware configuration intact; router up and running for more than 12hrs.

Might need to track down what's giving an increase in resistance which 
results to overshooting the -12V thresholds.

Regards,

Roy