National Instruments NI 781xR - page 30

Appendix A Specifications
© National Instruments Corporation A-3 NI 781xR User Manual
Power Requirement
+5 VDC (±5%)
NI7 811R.........................................9 mA (typ), 50 mA (max)1
NI7 813R.........................................9 mA (typ), 50 mA (max)1
+3.3 VDC (±5%)
NI7 811R.........................................650 mA (typ), 1,000 mA (max)2
NI7 813R.........................................850 mA (typ), 1,350 mA (max)2
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,
250m A 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
1 Does not include current drawn form the +5 V line on the I/O connectors.
2 Doesnot include current sourced by the digital outputs.
current sourced on channel i
i1=
j
∑