Part Code Definition

PXI = PXI industrial bus specification;

8461 = 2×CAN+1×LIN combined bus variant inside NI 846X vehicle communication family; suffix -02 stands for standard industrial temperature version; PXI‑8461/D is exclusive DeviceNet protocol customized edition.

Technical Specifications

Channel Layout：2×ISO11898 CAN2.0A/B channel + 1×ISO9141 LIN1.3/2.0/2.1 single-wire channel

Rate Parameter：CAN max 1 Mbps；LIN max 20 kbps

Onboard Buffer：8 kB TX+8 kB RX hardware FIFO per CAN port; 2 kB FIFO for LIN channel

Isolation Grade：500 VDC optical isolation between field transceiver and PXI backplane, ±15 kV ESD protection on all bus pins

Power Draw：+5V/0.85A from PXI backplane, external 8~27VDC optional auxiliary power for LIN bus feed

Ambient Rating：0~55℃ operating, -20~70℃ storage, RH5%~95% non-condensing, CE & RoHS certified

Dimension：Standard 3U PXI single slot, 160×100mm, net weight≈0.25kg

Interface & Communication Configuration

Front Panel Connector：1×DB9 female combo port, pin multiplex for dual CAN and single LIN signal routing; matching DB9-to-terminal breakout cable for field wiring

Backplane Bus：32bit/33MHz PXI peripheral bus, access PXI trigger bus for hardware synchronous timestamp linkage with DAQ/motion modules

Driver Compatibility：NI‑CAN, NI‑XNET driver suite; fully compatible LabVIEW, LabWindows/CVI, TestStand, Windows XP/Win7/LabVIEW RT real-time OS

Core Functions

1.Dual CAN independent monitoring & simulation: realize ECU message sending/receiving, bus load test, fault frame injection for automotive bench

2.LIN slave/master emulation: test vehicle door/window/lamp low-speed peripheral LIN network

3.1μs high-precision message timestamp, support multi-card PXI trigger synchronous acquisition for distributed bus logging

4.Optional listen-only mode without occupying bus, offline bus data capture without interfering running ECU network

5.Built-in software bus termination resistor configurable for CAN multi-drop bus topology adjustment

Application Scenarios

Automotive ECU bench ATE test, vehicle CAN/LIN network development verification, new energy BMS communication test bench, construction machinery controller bus debugging, legacy PXI test cabinet spare replacement matching PXI‑8186 embedded controller chassis.

Operation & Maintenance Notes

Use shielded twisted pair for CAN bus wiring; enable 120Ω terminal resistance only at two endpoints of long CAN bus; forbid hot plug field bus cable under powered condition to avoid transceiver burnout; separate CAN and power wiring in high EMI inverter workshop to reduce interference.