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PXIe‑8431/16 | 16-Port High-Speed RS485/RS422 PXI Express Serial Interface Module

PN：781473-02

The PXIe‑8431/16 is single-slot 3U PXI Express high-density asynchronous serial communication module, dedicated to multi-node industrial equipment communication, automotive ECU simulation and multi-serial-device automated test platformsNI. It integrates 16 independent RS485/RS422 channels without channel isolation, supporting both 2-wire half-duplex and 4-wire full-duplex transceiver modes, freely switched via software.

The baud rate range covers 2 baud ~ 3 Mbps, and Windows systems can unlock up to 10 Mbps high-speed mode by driver configurationNI. Adopts high-efficiency DMA transmission architecture, supports multi-threaded multi-process parallel reading and writing of 16 channels simultaneously, avoiding the bandwidth bottleneck of traditional interrupt-driven serial boards. All channels are virtualized as standard Windows COM ports, fully compatible with legacy serial communication programs without secondary code modification.

Front panel single 68-pin VHDCI female connector, matched with two 8-channel VHDCI-to-DB9 breakout cables (PN:197546-01) to expand 16 standard DB9 serial interfacesNI. Based on NI-Serial driver and NI-VISA universal instrument API, compatible with Windows and LabVIEW Real-Time OS, widely used for PLC networking, servo motion control, automotive CAN/LIN auxiliary serial simulation, sensor array multi-node communication screening.

Core Hardware Specifications

Slot Occupation: Single standard 3U PXIe peripheral slot
Serial Channels: 16 independent RS485/RS422 channels, non-isolated
Duplex Mode: Software selectable 2-wire half-duplex / 4-wire full-duplex
Baud Rate Range: 2 baud ~ 3 Mbps native; Windows up to 10 Mbps (driver unlock)NI
Transmission Architecture: Hardware DMA, multi-thread multi-process parallel IO
Software Compatibility: All channels mapped to standard COM ports
Front Connector: Single 68-pin VHDCI female, matched with VHDCI-DB9M split cable
Bus Interface: PXIe Gen1 x1 PCI Express bus
Supported Protocols: Modbus RTU, custom RS485 industrial serial protocols
Software Stack: NI-Serial driver, NI-VISA, LabVIEW, TestStand
Operating Env: 0 ℃ ~ 55 ℃, humidity 10%–90% non-condensing
Max Cable Length: 30m at low baud rate

Core Functional Advantages

Ultra-high density 16 serial ports integrated into one slot, which can replace multiple low-port serial cards, greatly reducing the number of occupied chassis slots for multi-node PLC, servo and ECU test systems, and simplifying cabinet wiring layout. High-speed DMA parallel transmission realizes simultaneous stable communication of all 16 channels without packet loss, solving the multi-channel data congestion problem of traditional interrupt serial boards in automated long-duration testing.

Dual duplex mode switching adapts to different industrial bus topologies: half-duplex for multi-drop Modbus bus networking, full-duplex for point-to-point high-speed servo control signal transmission. Virtual standard COM port design realizes seamless compatibility with old serial test software, no need to rewrite communication logic, and the test platform migration cost is extremely low.

Matched split DB9 cable directly outputs standard serial pins, which is convenient for docking with servo drives, PLC, industrial sensors and automotive ECUs without customized wiring fixtures. Unified NI-VISA programming library provides ready-made Modbus read-write, serial frame capture and fault diagnosis function blocks, drastically shortening LabVIEW automated test development cycle compared with third-party serial cards. Compact single-slot modular design reserves abundant expansion slots for DAQ, digital RIO and power measurement instruments.

Software Compatibility

Supports Windows 7/10/11 32/64-bit and LabVIEW Real-Time OS; fully compatible with LabVIEW, LabWindows/CVI, TestStand, NI-Serial driver, NI-VISA, NI MAX, supports C/C++/.NET/Python/MATLAB secondary development.

Typical Applications

Multi-station Modbus PLC network communication test, multi-axis servo motion controller parallel signal simulation, automotive ECU auxiliary RS485 serial hardware-in-the-loop (HIL) simulation, industrial multi-sensor array multi-node serial data collection, intelligent equipment serial communication fault screening, laboratory multi-serial device automated aging test benches.

1.Brand New Items: Comes with 3 Years Official Full Warranty

2. Used & Refurbished Items: Enjoy 2 Years Professional Warranty Service

3. Free Warranty Maintenance: All non‑human quality failures are covered for free repair and maintenance during the warranty period

4. Full Technical Support: Professional technical guidance and exclusive after‑sales repair services are provided for all warranty‑qualified products.

5.Strict Fault Verification: All product failures will be professionally inspected and confirmed to judge warranty eligibility accurately.

6. We strictly inspect damage reasons to confirm warranty eligibility.

• We ship out all orders within 3 business days after payment confirmed.

• Global fast shipping supported by FedEx and UPS Express Delivery.

• Real-time tracking number provided for every order, easy to track delivery status online.

• Every item will go through strict professional testing and full function inspection before shipment.

• We take detailed real photos for each product to confirm appearance, condition and accessories before delivery.

• Premium shockproof and anti-collision packaging to protect goods from damage during transit.

• Safe and smooth customs clearance, shorten delivery time.

• Complete accessories and intact packaging before shipping.

• Professional after-sales logistics support, we help solve all delivery and receiving problems.

• Fast global delivery, safe and reliable transportation guarantee.

PCIe S‑Series

NI S‑Series (61xx family) multifunction DAQ features true simultaneous‑sampling architecture with dedicated ADC per channel . Mostly PCI / PXI form‑factor, few native PCIe variants. It delivers near‑zero phase delay across channels, ideal for transient waveform capture, vibration, acoustic and other timing‑critical measurement tasks. Supported by NI‑DAQmx driver and compatible with LabVIEW, TestStand. Accessories are not interchangeable with X‑Series

PXIe X‑Series

NI PXIe X‑Series are high‑performance multifunction DAQ modules on PXIe bus. Built with STC3 timing engine, they integrate analog input, analog output, bidirectional DIO and four 32‑bit counter‑timers. Leverage PXIe high‑speed backplane for hardware triggering, retriggerable measurements and multi‑module synchronization with VHDCI‑68 connector. Fully compatible with NI‑DAQmx driver, supporting LabVIEW, TestStand, Python, C/C++ and C#. Widely applied for data acquisition, automated ATE and hardware‑in‑the‑loop test systems

NI‑9213 C‑Series Module

NI‑9213 is a high‑density C‑Series thermocouple input module for CompactDAQ and CompactRIO systems. It offers 16‑channel, 24‑bit thermocouple measurement with up to 75 S/s per‑channel sampling rate. Integrated cold‑junction compensation, open‑thermocouple detection and anti‑aliasing filters. 250 Vrms channel‑to‑earth isolation with NIST‑traceable calibration, spring‑terminal connector supporting all standard thermocouple types. Mix‑and‑match with other C‑Series modules, widely used for multi‑channel temperature monitoring, environmental chamber and thermal‑cycle testing

PXIe‑1065 chassis

PXIe‑1065 is NI high‑performance 18‑slot PXIe chassis, supporting mixed PXI and PXIe modules. It features 9 PXI slots, 4 hybrid slots, 3 PXIe peripheral slots and one PXIe system timing slotNI. High‑bandwidth backplane delivers low‑jitter 10 MHz /100 MHz reference clocks, supporting PXIe star trigger and multi‑module synchronization. Field‑replaceable modular power supply shuttle, temperature‑controlled variable‑speed fans, up to 30 W per‑slot cooling and rack‑mount capability. Widely deployed for multi‑channel ATE systems, hardware‑in‑the‑loop, signal acquisition and simulation test benches

NI PXIe‑8431/16 781473-02 16-Port RS485/RS422 PXIe Serial Interface Module

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Description

warranty service

logistics service

PXIe‑8431/16 | 16-Port High-Speed RS485/RS422 PXI Express Serial Interface Module

Core Hardware Specifications

Core Functional Advantages

Software Compatibility

Typical Applications

PCIe S‑Series

PCIe S‑Series

PXIe X‑Series

NI‑9213 C‑Series Module

PXIe‑1065 chassis