Current Input Support for National Instruments Hardware

Updated May 2, 2018

Reported In

Hardware

  • PXIe-4300
  • PXIe-4302
  • PXIe-4303
  • NI-9203
  • NI-9207
  • NI-9208
  • NI-9219
  • NI-9227
  • PXI-6236
  • PCI-6236
  • PCI-6238
  • PXI-6238
  • PCI-6239
  • PXI-6239
  • SCXI-1120
  • SCXI-1120D
  • SCXI-1125
  • SCXI-1126
  • SCXI-1308
  • SCXI-1100
  • SCXI-1102
  • cFP-AI-110
  • cFP-AI-100
  • cFP-AI-111

Driver

  • NI-DAQmx
  • NI-DMM

Issue Details

I need to measure a current; what products does National Instruments make that will let me read current?

Solution

The following devices support reading a current input:
  • SC Express: The PXI and PXIe SC Express series can be configured for multiple kinds of Analog Input. This is specified by the terminal block used with the device.
  • C Series: There are several C-Series Modules that have current input capability that can be used in either a cRIO or CompactDAQ chassis.
    • NI 9203 is an 8-channel (16-bit) module for +/- 20 mA
    • NI 9207 is a 16-channel (16-bit) module with 8 channels for current inputs at +/- 21.5mA and 8 channels for voltage inputs at +/- 10 V
    • NI 9208 is a 16-channel (24-bit) module for +/- 21.5 mA
    • NI 9219 is a 4-channel (24-bit) module that can be configured for +/- 25 mA
    • NI 9227 is a 4-channel (24-bit) module that can be configured for +/- 5 Arms
  • Digital Multimeters: All National Instruments DMMs are designed to measure current.
  • Multifuction DAQ: The NI 623x devices support current input measurements.
    • PCI-6236 / PXI-6236 is a 4-channel (16-bit) bank isolated device for +/- 20mA
    • PCI-6238 / PXI-6238 is an 8-channel (16-bit) bank isolated device for +/- 20mA
    • PCI-6239 / PXI-6239 is an 8-channel (16-bit) bank isolated device for +/- 20mA
  • SCXI: For SCXI terminal blocks that are configured for current input, each input channel includes a 249 Ohm precision resistor, so you can read 0-20 mA or 4-20 mA current inputs.
  • SCC: As with Multifunction DAQ and SCXI, SCC reads current input because each input channel includes a 249 Ohm precision resistor, so you can read 0-20 mA or 4-20 mA current inputs.
    • SCC-CI20 is a dual-channel module that accepts two 0 to 20 mA or 4 to 20 mA current loop inputs.
  • FieldPoint: Both FieldPoint and Compact FieldPoint have I/O Modules that can be configured for voltage or current input.
    • cFP-AI-110 is an 8-channel (16-bit) single-ended input module for 0-20 mA, 4-20 mA, or +/- 20mA (software selectable)
    • cFP-AI-100 is an 8-channel (12-bit) single-ended input module for 0-20 mA, 4-20 mA, or +/- 20mA (software selectable)
    • cFP-AI-111 is a 16-channel (16-bit) single-ended input module for 0 to 20 mA, 4 to 20 mA, ±20 mA (software selectable)
    • cFP-AI-CXXX is a 2-single ended or 1-differential (12-bit) input module for mA or A range signal (software selectable).

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