National Instruments NI 7831R Uživatelský manuál stáhnout pdf (Strana 51)

Appendix A Specifications

by the digital outputs use the

following equation:

Where j is the number of digital outputs being used to source current.

Power available at I/O connectors ......... +4.50 to +5.25 VDC at 1 A total,

250 mA per I/O connector pin

Physical

Dimensions (not including connectors)

NI PXI-7831R................................. 16 cm by 10 cm (6.3 in. by 3.9 in.)

NI PCI-7831R ................................. 17 cm by 11 cm (6.7 in. by 4.3 in.)

I/O connectors ........................................ Three 68-pin female high-density

VHDCI type

Maximum Working Voltage

Maximum working voltage refers to the signal voltage plus the

common-mode voltage.

Channel-to-earth..................................... ±12 V, Installation Category I

Channel-to-channel ................................ ±24 V, Installation Category I

Environmental

The NI 7831R is intended for indoor use only.

Operating Environment

Using 40 MHz timebase......................... 0 to 55 °C, tested in accordance

with IEC-60068-2-1 and

IEC-60068-2-2

Using 80 MHz timebase......................... 0 to 55 °C in all NI PXI chassis

except the following:

0 to 40 °C when installed in an

NI PXI-1000/B or NI PXI-101X

current sourced on channel

i 1=

∑

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 70 71

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National Instruments NI 7831R Uživatelský manuál Strana 51