NI 9870 4-Port, RS232 Serial Interface Module for CompactRIO

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  • 4 RS232 (TIA/EIA-232) serial ports for CompactRIO
  • Baud rates from 14 b/s to 921.6 kb/s
  • Data bits: 5, 6, 7, 8; Stop bits: 1, 1.5, 2; Flow control: XON/OFF, RTS/CTS, None
  • Individual 64 B UART FIFO buffers per port
  • 8 to 28 VDC externally powered; PC-MF4-PT cable included
  • -40 to 70 °C operating range
  • Configure Complete CompactRIO System
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The NI 9870 serial module adds four RS232 serial ports to NI CompactRIO systems. With an NI LabVIEW FPGA API, the four ports are accessed directly from the CompactRIO field-programmable gate array (FPGA) to offer you flexibility in communicating with serial devices. The module has individual 64 B buffers on every port that save CompactRIO FPGA space and simplify programming.

This C Series module supports standard start bit, stop bit, and handshaking settings, and has baud rates up to 921.6 kb/s per port. You can pass up to 1.28 Mb/s of data between the module and CompactRIO.

The NI 9870 uses an external power to provide maximum compatibility and reliability under all serial port conditions. A 35 cm female microfit to pigtail power cable is included for quick connection to the CompactRIO external power supply. The optional PC-MF4-Y C Series microfit male to 2 female Y adapter cable is available for daisy chaining multiple NI 987x module power supplies.

NI 987x C Series modules are available in a bundle with four 10P10C modular jack to DB9 (DE9) female cables for out-of-the-box connectivity.

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Specifications Documents

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Specifications Summary


NI 9870 Packages

To use the NI 9870 , you need all items in the diagram below. Select Option 1 if you already own a CompactRIO System, or Option 2 if you do not already own a chassis, controller, or software.

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CompactRIO System

NI 9870



NI 9870
- 779891-02 Qty $ 548 each
- 779891-03 Qty $ 712 each
- 779891-01 Qty $ 635 each
Optional Accessories
Qty $ 21 each
Qty $ 9 each
Qty $ 26 each
Qty $ 28 each
Qty $ 33 each
Qty $ 38 each
Qty $ 28 each
Qty $ 33 each
Qty $ 38 each

Package Price: $ 548

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