Description
NI PXI-8423 High Power Output Module Digital Expansion Module
PXI-8423
As a core component of the PXI ecosystem, the NI PXI-8423 is purpose-built to simplify communication with serial and CAN-based devices. Its primary role is to enable bidirectional data exchange across multiple protocols, including RS-232, RS-422, RS-485, and CAN 2.0A/B, while leveraging the high-speed backplane of PXI for low-latency integration with other measurement modules. Whether deployed in a factory automation line, a research lab test bench, or a harsh industrial environment, this module serves as a critical link, ensuring stable communication between disparate systems and facilitating real-time control and monitoring.
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Label
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Specification
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Model Number
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PXI-8423
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Brand
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National Instruments (NI)
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Type
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Dual-Channel Serial & CAN Interface Module
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Form Factor
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PXI Express (3U)
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Supported Protocols
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RS-232, RS-422, RS-485, CAN 2.0A/B (with CAN FD support)
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Data Rates
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Serial: Up to 10 Mbps; CAN: Up to 1 Mbps (CAN FD: 5 Mbps)
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Isolation
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2.5 kV rms isolation for serial channels; 500 V DC isolation for CAN
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Operating Temperature
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0°C to +55°C (commercial); -40°C to +70°C (extended temperature models)
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PXI Bus Interface
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PCI Express Gen 1 x1 (up to 250 MB/s bandwidth)
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Dimensions
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160mm x 100mm x 20mm (PXI 3U form factor)
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Power Consumption
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3.2W (typical operation)
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Certifications
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CE, FCC Part 15, RoHS compliant
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Software Support
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NI-VISA, LabVIEW, C/C++, Python, MATLAB
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PXI-8423
The NI PXI-8423 distinguishes itself through its robust combination of protocol flexibility and industrial-grade reliability. Its dual-channel design allows simultaneous management of serial and CAN networks, reducing the need for multiple interface cards and simplifying system architecture. The module’s advanced isolation features protect against electrical noise and ground loops, a critical advantage in environments with heavy machinery or high-power equipment. Engineers benefit from its hardware-based flow control and error detection, which ensure data integrity even in high-interference settings, while the CAN FD (Flexible Data Rate) support future-proofs systems for next-generation industrial networks.
PXI-8423
Integration with the PXI platform is a key strength, as the NI PXI-8423 leverages the bus’s deterministic timing and synchronization capabilities for precise control applications. Its plug-and-play compatibility with NI’s extensive software suite—including LabVIEW and NI-VISA—streamlines configuration and troubleshooting, allowing developers to quickly implement complex communication protocols without low-level coding.
NI PXI-8421 – A single-channel serial-only variant for simpler setups requiring basic RS-232/485 connectivity.
- NI PXI-8433 – A four-channel CAN module with advanced timing features, ideal for high-density network applications.
- NI PXIe-8265 – A high-speed Ethernet module that pairs with the PXI-8423 for hybrid serial/Ethernet control systems.
- NI USB-8473 – A portable USB alternative for mobile test rigs or temporary installations needing serial and CAN connectivity.
- NI cRIO-9068 – A rugged embedded controller that integrates with the PXI-8423 for standalone industrial control in harsh environments.
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