National Instruments NI 781xR User Manual download pdf (Page 30)

Appendix A Specifications

Power Requirement

+5 VDC (±5%)

NI 7811R......................................... 9 mA (typ), 50 mA (max)

NI 7813R......................................... 9 mA (typ), 50 mA (max)

+3.3 VDC (±5%)

NI 7811R......................................... 650 mA (typ), 1,000 mA (max)

NI 7813R......................................... 850 mA (typ), 1,350 mA (max)

To calculate the total current sourced 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,

250 mA per I/O connector pin

Physical

Dimensions (not including connectors)

NI PXI-781xR ................................ 16.0 cm × 10.0 cm

(6.3 in. × 3.9 in.)

NI PCI-781xR ................................ 15.5 cm × 10.6 cm

(6.105 in. × 4.162 in.)

Weight

PCI-781xR ...................................... 112 g

PXI-781xR ...................................... 162 g

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

VHDCI type

Does not include current drawn form the +5 V line on the I/O connectors.

Does not include current sourced by the digital outputs.

current sourced on channel

i 1=

∑

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National Instruments NI 781xR User Manual Page 30