Appendix A
Specifications
©
National Instruments Corporation
A-3
Maximum ripple and noise (20 MHz bandwidth)
Over-current protection.......................... All outputs protected from short
circuit and overload with
automatic recovery when the
short or overload is removed.
Over-voltage protection
1
3.3 V................................................ 140 to 150% above nominal
output voltage
5 V, +12 V, –12 V........................... 120 to 130% above nominal
output voltage
Power-supply shuttle MTTR.................. Replacement in under 5 minutes
Chassis Cooling
Per slot cooling capacity ........................ Slot cooling capacity is 25 W
with fan speed set to HIGH
Slot airflow direction ............................. P1 to P2, bottom of module
to top of module
Module cooling
System............................................. Forced air circulation
(positive pressurization)
through three 140 cfm fans with
HIGH/AUTO speed selector
Intake .............................................. Bottom rear of chassis
Exhaust............................................ Along both sides and top
of chassis
Voltage
Maximum Ripple and Noise
+3.3 V
50 mV
pp
+12 V
120 mV
pp
+5 V
50 mV
pp
–12 V
120 mV
pp
1
To reset over-voltage protection, remove the mains for 30 seconds and then power back up.
