Appendix A
Specifications
©
National Instruments Corporation
A-3
NI PXI-1042 Series User Manual
Over-current protection.......................... All outputs protected from short
circuit and overload with
automatic recovery
Over-voltage protection
3.3 V and 5 V .................................. Clamped at 20 to 30% above
nominal output voltage
+12 V and –12 V............................. Clamped at 26 to 29 V difference
b12 and –12 V outputs
Power-supply shuttle MTTR.................. Replacement in under 5 minutes
Chassis Cooling
Per slot cooling capacity ........................ 25 W
Module cooling system
PXI-1042......................................... Forced air circulation (positive
pressurization) through two
60 cfm fans with HIGH/AUTO
speed selector
PXI-1042Q...................................... Forced air circulation (positive
pressurization) through two
51 cfm fans with HIGH/AUTO
speed selector
Slot airflow direction ............................. P1 to P2, bottom of module to
top of module
Module cooling intake ........................... Bottom rear of chassis
Module cooling exhaust ......................... Along both sides and top of
chassis
Power supply cooling system................. Forced air circulation through
integrated fan
Power supply cooling intake .................. Right side of chassis
Power supply cooling exhaust................ Left side of chassis
