NI PXI-8461

Technical Specifications: Protocols: High-speed CAN, fault-tolerant low-speed CAN, single-wire CAN, LIN, DeviceNet Isolation: 500 VDC port-to-backplane galvanic isolation Maximum CAN Baud Rate: 1 Mbps Physical Layer: ISO 11898 compliant Bus Interface: Phoenix terminal connector

Function Features: Port isolation suppresses automotive common-mode surge. Independent automotive-grade transceiver per channel. Auxiliary digital I/O for bus wake-up and fault diagnosis. Synchronized logging with PXI DAQ modules via PXI trigger bus. NI-CAN driver support.

Application Scenarios: Automotive ECU bench testing, CAN bus simulation and logging, DeviceNet industrial network test, LIN node validation, vehicle network diagnostic.

Material Composition: Front panel: aluminum alloy. PCB: multi-layer FR4 board. Isolation transformer and opto-coupler isolation circuit. Automotive bus transceivers.

Structural Features: 3U single-slot PXI module. Isolation barrier separates field bus side and PXI backplane side. Phoenix screw terminals on front panel.

Working Principle: Isolated transceivers convert CAN/LIN logic signals between PXI digital domain and vehicle bus differential domain. Onboard microcontroller handles bus protocol encoding, decoding and message filtering.

Installation Requirements: Install into 3U PXI chassis. Use twisted pair CAN bus cable. Install NI-CAN driver. Connect bus termination resistor as required.

Usage Notes: Maintain 120 Ω termination at bus two ends for high-speed CAN. Isolation rating must not be exceeded. Protect against reverse power supply on bus terminals.