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NI-9871
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NI (National Instruments) · CompactRIO

NI-9871

The NI-9871 is a four-port RS422/RS485 C Series serial interface module for CompactRIO. It provides four serial channels with RJ50 front connections and a maximum baud rate of 3.68 Mbits/s.

ManufacturerNI (National Instruments)
ModelNI-9871
Part Number779892-01 · 779892-03
Product Type4-Port, RS485/RS422 C Series Serial Interface Module
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Supported Serial ProtocolsRS422, RS485
Supported Hardware PlatformCompactRIO
Maximum Baud Rate3.68 Mbits/s
Operating Temperature Range-40 °C to 70 °C
Front Connection TypeRJ50
Isolation TypePort-to-earth ground
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Overview

Product overview

Key product information and technical features.

The NI-9871 provides four RS422/RS485 serial channels in a C Series module for CompactRIO. Direct FPGA access to the serial ports supports flexible communication with serial devices.

Each port has an individual buffer, and the module supports standard start-bit, stop-bit and handshaking settings. The enclosed module uses RJ50 front connections and has a specified operating temperature range of -40 °C to 70 °C.

  • Four serial channels supporting RS422 and RS485 protocols.
  • Maximum baud rate of 3.68 Mbits/s.
  • Direct FPGA access to the serial ports, with individual buffers on every port.
  • Supports standard start-bit, stop-bit and handshaking settings.
  • RJ50 front connections with port-to-earth ground isolation.
  • Enclosed design with an operating temperature range of -40 °C to 70 °C.
Verified specifications

Technical data

Verified product specifications.

Supported Serial ProtocolsRS422, RS485
EnclosedYes
Supported Hardware PlatformCompactRIO
Maximum Baud Rate3.68 Mbits/s
Operating Temperature Range-40 °C to 70 °C
Front Connection TypeRJ50
Isolation TypePort-to-earth ground
Number of Serial Channels4
NI part numbers779892-01, 779892-03, 779892-02
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NI

Manufacturer

CompactRIO

Supported Hardware Platform

NI-9871

This product

Platform shown as listed by NI. Confirm controller, chassis and software fit for your system with NI before integration.
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Getting Started (NI)Getting Started · ni.com
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Specifications (NI)Specifications · ni.com
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Dimensional Drawings (NI)Dimensional Drawings · ni.com
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Product Page (NI)Product Page · ni.com
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FAQ

Product-specific questions

Product-specific answers based on available technical information.

How many serial channels does the NI-9871 provide?

The NI-9871 provides four serial channels supporting RS422 and RS485.

What is the maximum baud rate of the NI-9871?

The specified maximum baud rate is 3.68 Mbits/s.

What front connections does the NI-9871 use?

The module uses RJ50 front connections.

Which hardware platform is listed for the NI-9871?

CompactRIO is the listed hardware platform. Confirm support for your particular controller, chassis and software configuration before integration.

What is the operating temperature range?

The specified operating temperature range is -40 °C to 70 °C.

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