National Instruments Corporation NI 9871 4-Port RS422/RS485 Serial Module (Module Only)
- 4 RS485/RS422 (TIA/EIA-485/422) ports for CompactRIO
- Baud rates from 14 baud to 3.684 Mbaud; -40 to 70 C operating range
- 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
- Transceiver modes: 4-wire, 2-wire DTR controlled, 2-wire DTR controlled with echo, 2-wire auto
- 8 to 28 VDC externally powered; PC-MF4-PT cable included
- Configure Complete CompactRIO System
- View Data Sheet
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The NI 9871, part number 779892-02, is a C Series module from National Instruments designed to add four high-performance, isolated RS422/RS485 serial ports to CompactRIO and CompactDAQ systems. Each port is individually isolated for robust communication in industrial environments, supporting baud rates up to 3 Mbps. The module is hot-swappable and offers advanced features such as programmable termination and biasing, as well as compatibility with both full-duplex and half-duplex communication. The NI 9871 is engineered for reliable, high-speed serial data acquisition and control applications, and is compatible with NI-DAQmx and NI-VISA drivers for seamless integration into NI software environments.