R Series Intelligent DAQ –
Data Acquisition and Control with Onboard Processing
Timebases
Timebase reference sources
Maximum Working Voltage
Maximum working voltage refers to the signal voltage plus the
NI PCI-781xR/783xR ....................... Onboard clock only
NI PXI-78xxR................................... Onboard clock, phase-locked to
PXI 10 MHz clock
common-mode voltage.
Channel-to-earth................................. 12 V, Measurement Category I
Channel-to-channel............................. 24 V, Measurement Category I
LabVIEW FPGA derived clocks............ Up to 200 MHz
Timebase accuracy, onboard clock ..... 100 ppm, 250 ps
peak-to-peak jitter
Caution: Do not use the NI 783xR/784xR/785xR for connection to
signals in Measurement Category II, III, or IV.
Phase-locked to PXI 10 MHz clock
Power Requirement
(NI PXI-78xxR only) ......................... Adds 350 ps peak-to-peak jitter
Additional frequency-dependent peak-to-peak jitter
NI 781xR/783xR
40 MHz ....................................... None
80 MHz ....................................... 400 ps
120 MHz ..................................... 720 ps
160 MHz ..................................... 710 ps
200 MHz ..................................... 700 ps
NI 784xR/785xR
+5 VDC ( 5%)1
NI 781xR ......................................... 9 mA (typ), 50 mA (max)
NI 7830R/7831R ............................. 330 mA (typ), 355 mA (max)
NI 7833R......................................... 364 mA (typ), 586 mA (max)
NI 7841R/7851R ............................. 125 mA (typ), 252 mA (max)
NI 7842R/7852R ............................. 136 mA (typ), 291 mA (max)
NI 7853R......................................... 460 mA typ
NI 7854R......................................... 484 mA typ
+3.3 VDC ( 5%)2
NI 7811R......................................... 650 mA (typ), 1,000 mA (max)
NI 7813R......................................... 850 mA (typ), 1,350 mA (max)
NI 7830R/7831R ............................. 462 mA (typ), 660 mA (max)
NI 7833R......................................... 727 mA (typ), 1,148 mA (max)
NI 7841R/7851R ............................. 525 mA (typ), 1,244 mA (max)
NI 7842R/7852R ............................. 604 mA (typ), 1,484 mA (max)
NI 7853R .................................................. 640 mA typ
NI 7854R .................................................. 843 mA typ
+12 V
NI 784xR/785xR.............................. 0.5 A
-12 V
NI 784xR/785xR.............................. 0.25 A
+5 V terminal
Connector 0..................................... 0.5 A max
Connector 1..................................... 0.5 A max
Connector 2..................................... 0.5 A max
All connectors................................. 1.5 A max3
To calculate the total current sourced by the digital outputs, use
the following equation:
40 MHz ....................................... None
80 MHz ....................................... 460 ps
120 MHz ..................................... 172 ps
Calibration (NI 783xR/784xR/785xR Only)
Recommended warm-up time............. 15 minutes
Calibration interval ............................. 1 year
Onboard calibration reference
DC level........................................... 5.000 V ( 3.5 mV) (actual value
stored in flash memory)
Temperature coefficient...................... 5 ppm/ꢀC max
Long-term stability.............................. 20 ppm/1,000 h
Note: Refer to Calibration Certificates at ni.com/calibration to
generate a calibration certificate for the NI 783xR.
Bus Interface
PXI (NI PXI-78xxR only) ....................... Master, slave
PCI (NI PCI-781xR/783xR only) ........... Master, slave
Physical
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Dimensions (not including connectors)
NI PCI-781xR/783xR ......................... 17 by 11 cm (6.7 by 4.3 in.)
NI PXI-78xxR ..................................... 16 by 10 cm (6.3 by 3.9 in.)
Weight
NI PCI-781xR/783xR ....................... 112 g
NI PXI-78xxR................................... 152 g
I/O connectors
∑
current sourced on channel i
i=1
Power available at I/O connectors ..... 4.50 to 5.25 VDC at 1 A total,
250 mA per I/O connector pin
1 Does not include current drawn from the +5 V line on the I/O connectors.
2 Does not include current sourced by the digital outputs.
3 The NI 784xR/785xR devices have a user-replaceable socketed fuse that opens when current
exceeds the current specification. Refer to the R Series Intelligent DAQ User Manual, available
at ni.com/manuals, for information about fuse replacement.
NI 781xR ......................................... Four 68-pin female
high-density VHDCI type
NI 783xR/784xR/785xR .................. Three 68-pin female
high-density VHDCI type
BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.)
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NI [ National Instruments ]
