National Instruments NI PXI-1042 用户手册

The fan-speed selector switch is on the rear panel of the power supply 
shuttle. Refer to Figure 1 to locate the fan-speed selector. Select HIGH for 
maximum cooling performance (recommended) or AUTO for quieter 
operation. When set to AUTO, air-intake temperature determines the fan 
speed.

The power supply shuttle is designed with a three-position NEMA 5-15 jack that 

connects the ground line to the chassis ground. To minimize shock hazard, make sure the 
electrical power outlet you use to power the chassis has an appropriate earth safety ground.

If your power outlet does not have an appropriate ground connection, you 
must connect the premise safety ground to the chassis grounding screw. 
Refer to Figure 1 to locate the chassis grounding screw. To connect the 
safety ground, complete the following steps:

1.

Connect a 16 AWG (1.3 mm) wire to the chassis grounding screw 
using a grounding lug. The wire must have green insulation with a 
yellow stripe or must be noninsulated (bare).

2.

Attach the opposite end of the wire to permanent earth ground using 
toothed washers or a toothed lug.

Input voltage range .................................100 to 240 VAC

Operating voltage range

1

........................90 to 264 VAC

Input frequency.......................................50/60 Hz

Operating frequency range

1

....................47 to 63 Hz

Input current rating .................................8 A

Over-current protection ..........................10 A circuit breaker

Line regulation

3.3 V ................................................<±0.2%

5 V ...................................................<±0.1%

±12 V ...............................................<±0.1%

1   

The operating range is guaranteed by design.