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NI 9871

4-Port, RS485/422 Serial Interface Module for CompactRIO

  • 4 RS485/422 (TIA/EIA-485/422) ports for CompactRIO
  • Baud rates from 14 b/s to 1.842 Mb/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
  • Transceiver modes: 4-wire, 2-wire DTR controlled, 2-wire DTR controlled with echo, 2-wire auto
  • -40 to 70 °C operating range
  • Specifications popup

Step 1: Verify Device and Quantity Selection
Part
Number
Description Est Ship Days Glossary Definition US Dollars
(change)
Qty
  NI 9871      
779892-02 Module with Power Cable -- For price, select country  
779892-01 Module with (4) 10P10C-DE9M-SO cables and Power Cable
NI Recommended
-- For price, select country  
Step 2: Select Optional Accessories
Part
Number
Description Est Ship Days Glossary Definition US Dollars
(change)
Qty
Module External Power Cables
198303-01 PC-MF4-Y Power Cable C-Series Microfit Y-Adapter M to 2 Fem (0.2m) -- For price, select country  
198159-01 PC-MF4-PT Power Cable C-Series Microfit Female to Pigtail (0.35m) -- For price, select country  
Shielded
182845-01 10P10C-DE9M-SO Serial Cable, 10-pos plug to DE9-M Standoffs (1m) -- For price, select country  
Shielded Cables
183283-01 RS485/RS422 Null Modem Cable (1m) -- For price, select country  
183283-02 RS485/RS422 Null Modem Cable (2m) -- For price, select country  
183283-04 RS485/RS422 Null Modem Cable (4m) -- For price, select country  
Step 3: Add to Cart or Get a Quote
Step 2: Select Optional Accessories
Part
Number
Description Est Ship Days Glossary Definition US Dollars
(change)
Qty
Module External Power Cables
198303-01 PC-MF4-Y Power Cable C-Series Microfit Y-Adapter M to 2 Fem (0.2m) -- For price, select country  
198159-01 PC-MF4-PT Power Cable C-Series Microfit Female to Pigtail (0.35m) -- For price, select country  
Shielded
182845-01 10P10C-DE9M-SO Serial Cable, 10-pos plug to DE9-M Standoffs (1m) -- For price, select country  
Shielded Cables
183283-01 RS485/RS422 Null Modem Cable (1m) -- For price, select country  
183283-02 RS485/RS422 Null Modem Cable (2m) -- For price, select country  
183283-04 RS485/RS422 Null Modem Cable (4m) -- For price, select country  
Step 3: Add to Cart or Get a Quote

Please select the country where you will use the product(s) so that we can provide you with accurate pricing, availability, and purchasing information

The NI 9871 serial module adds four RS485/RS422 serial ports to CompactRIO systems. It interfaces directly with 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 1.843 MBd per port. You can pass up to 2 Mb/s of data between the module and CompactRIO.

The NI 9871 uses an external power supply 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.

Additional Product Information


Specifications Documents


Specifications Summary