Model Nomenclature

• PXI: 3U PXI modular instrumentation bus

• 8512: NI high‑speed CAN FD interface series

• /1: 1‑port configuration (P/N 780687‑01)

• /2: 2‑port configuration (P/N 780687‑02)

Technical Specifications

• Form factor: 3U, single‑slot PXI

• Ports: 1 or 2 × high‑speed CAN 2.0A/B & CAN FD (ISO 11898‑2)

• Transceiver: NXP TJA1041/TJA1043 (high‑speed, CAN FD capable)

• Baud rate: CAN 2.0 up to 1 Mbps; CAN FD up to 2 Mbps

• Connectors: 1 or 2 × DB‑9 male (front panel)

• Isolation: 500 Vrms port‑to‑chassis and port‑to‑port isolation

• DMA: Onboard DMA engine, zero CPU interrupt for frame transfer

• Latency: Typical <50 µs

• Message filtering: Advanced hardware filtering per port

• Bus voltage range: CAN_H/CAN_L –27 VDC to +40 VDC

• Power: +5 VDC (640 mA); +3.3 VDC (940 mA) from PXI backplane

• Operating temperature: 0 °C to 55 °C; storage –20 °C to 70 °C

• Software: NI‑XNET, LabVIEW, LabWindows/CVI, C/C++, Python, VeriStand

• OS: Windows 7/10/11, LabVIEW Real‑Time

Interface and Communication Configuration

• Front‑panel DB‑9 male connectors for standard CAN cables

• Each port independently configurable for baud rate, CAN 2.0/CAN FD mode, and filtering

• Supports listen‑only mode for passive bus monitoring

• RTSI/PXI trigger bus support for multi‑module synchronization (7 in/out trigger lines, 1 in/out clock line)

• Termination: Requires external 120 Ω termination resistors at both ends of the bus

• Configuration via NI‑MAX or NI‑XNET API; supports DBC/FIBEX/NCD CAN database import

Core Features

• CAN FD support: Higher bandwidth for large payloads (up to 64 bytes) vs. classic CAN (8 bytes)

• 500 Vrms isolation: Protects PXI chassis from ground loops and voltage transients

• NI‑XNET DMA: Offloads CAN frame processing from CPU, reducing latency and jitter

• Real‑time performance: Precise 1 µs timestamping for accurate event correlation

• Multi‑protocol support: Seamless switching between CAN 2.0 and CAN FD

Application Scenarios

• Automotive ECU development and HIL simulation (CAN FD networks)

• Commercial vehicles: High‑speed CAN FD for powertrain and infotainment systems

• Industrial automation: High‑speed CAN FD for motion control and sensor networks

• Aerospace and defense: CAN FD‑based vehicle and avionics system testing

• Bus monitoring and diagnostics: High‑speed logging of complex CAN/CAN FD networks

Usage and Maintenance Instructions

Installation and Configuration

1. Insert the module into any 3U PXI slot and secure the front panel.

2. Connect CAN/CAN FD cables to the DB‑9 ports and external CAN nodes; add 120 Ω termination at bus ends.

3. Power on the chassis; Windows automatically detects the hardware.

4. Install the NI‑XNET driver and configure ports in NI‑MAX.

5. Develop applications using LabVIEW or C/C++ with the NI‑XNET API.

Daily Maintenance

• Inspect DB‑9 connectors and cables for damage or loose pins.

• Ensure proper bus termination (120 Ω) to avoid signal reflection.

• Operate within 0–55 °C; keep the chassis clean and dry.

• Avoid hot‑swapping the module or CAN cables during operation.

• Store unused modules in anti‑static bags in a cool, dry place.

Safety Notice

• Do not exceed the 500 Vrms isolation rating or –27 VDC to +40 VDC bus voltage limits.

• Follow local regulations for disposal at end‑of‑life.