Used FANUC A20B-3300-0390/03A R-J3iB Robot 8-Axis Board

The FANUC A20B-3300-0390/03A is a genuine, high-performance 8-axis control interface card (Axis Board) precision-engineered for legacy FANUC R-J3iB robot controller series. Operating as a highly specialized servo-control co-processor module, this card scales up your primary cabinet’s processing capacity to coordinate up to 8 simultaneous motion trajectories. It is the vital hardware backbone required for interfacing with external 2-axis positioners, 7th-axis linear tracks, or multi-axis tooling synchronous operations.

Part Number: A20B-3300-0390/03A (Perfect match for R-J3iB mainboards)
Condition: Used / Refurbished
Brand: FANUC
Axis Support: Up to 8-Axis Multi-Channel Command Routing
Key Benefits: Flawless high-speed pathinterpolation, seamless command timing synchronization, plug-and-play main rack insertion, and genuine OEM reliability.

Product Detail

Genuine FANUC A20B-3300-0390/03A 8-Axis Motion Control Card

Achieve highly precise path interpolation and seamless multi-axis synchronization on your complex robotic cells without funding expensive full-cabinet upgrades with this authentic FANUC A20B-3300-0390/03A 8-Axis Board. Positioned inside the core computational rack of your R-J3iB enclosure, this premium daughter board processes localized encoder feedback registers and commands rapid position signals to servo amplifiers, ensuring peripheral hardware tracks perfectly with the primary arm's real-time motion coordinates.

Why Source Refurbished FANUC Axis Boards From Us?

Rigorous Axis Multi-Loop Diagnostics: Axis control cards operate on delicate micro-timings. Every A20B-3300-0390/03A board we supply goes through extensive active motion simulation on functional R-J3iB test benches. We monitor pulse command accuracy across all 8 channels, test encoder feedback registers, and check for positional drifting flags to guarantee 100% standard field operations.
Seamless Drop-In Modular Hardware Fitting: Manufactured exactly to original FANUC factory physical blueprints, grounding schemes, and socket header dimensions. Your maintenance engineering crew can execute a rapid direct hardware swap—simply unseat the malfunctioning axis card and push this certified replacement into position.
Keep Complex Workcells Running Economically: A sudden failure on your additional axis card paralyzes your entire multi-station welding or heavy-material handling cell, creating severe bottleneck flags. Because brand-new legacy R-J3iB parts carry long supplier backlogs, our certified pre-owned original units offer a fast, cost-efficient path to protect your MRO timeline.
Industrial Noise Suppression Layout: Formulated with multi-layer copper tracks and premium internal electrical shields, this PCB effectively deflects harsh factory EMI anomalies, voltage line surges, and constant cabinet cooling vibrations.