FANUC A05B-2400 Series Modules A05B-2400-C060

Technical Dossier

Product Details And Specifications

FANUC A05B-2400 Series Technical Notes

The FANUC A05B-2400 series represents the core control hardware platform for FANUC Series 16, 18, and 21 CNC systems — among the most widely deployed CNC architectures in global heavy industry. These control units are installed across chemical processing plants, nuclear facility machining centers, petroleum refinery automation lines, automotive body-in-white production, and aerospace component manufacturing. The A05B-2400 designation covers the main control printed circuit board assemblies (PCBAs) and integrated control unit modules that govern axis interpolation, PMC ladder execution, spindle control interface, and operator panel communication within the FANUC FS16/18/21 architecture. Their long production lifecycle and broad OEM adoption have made them a critical spare parts category for facilities operating legacy CNC equipment with 10–25 year service horizons.

The Evolution of A05B-2400 Architecture

The A05B-2400 series emerged as FANUC transitioned from the earlier Series 0 and Series 10/11 platforms to the modular, high-speed bus architecture of the Series 16/18/21 in the early 1990s. The initial hardware revisions used discrete ASIC-based axis control with parallel backplane communication. Mid-generation revisions introduced FSSB (FANUC Serial Servo Bus) integration directly onto the main control board, reducing wiring complexity and improving servo loop bandwidth. Later production runs incorporated enhanced PMC (Programmable Machine Controller) memory capacity and expanded SRAM for part program storage. The A05B-2400 platform is fully compatible with FANUC Series 16i/18i/21i-A and -B control software when paired with the appropriate servo amplifier and I/O link modules. As of 2026, the entire A05B-2400 hardware family has entered the end-of-production phase; FANUC's current equivalent platform is the Series 30i/31i/32i-B, using the A05B-2600 and A05B-2518 board families. For facilities that cannot migrate to the 30i platform, long-term maintenance sourcing of A05B-2400 assemblies is the primary continuity strategy.

A05B-2400 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly stocked modules within the A05B-2400 series, classified by functional category:

Main Control & CPU Boards

• A05B-2400-C060: Main CPU control unit board for FANUC Series 16/18/21 CNC systems; governs axis interpolation and PMC execution.
• A05B-2400-C061: Variant of C060 with extended SRAM capacity for larger part program storage requirements.
• A05B-2400-C062: High-speed CPU board revision with enhanced FSSB servo bus throughput for multi-axis configurations.
• A05B-2400-C064: Main control board for Series 21i-A; reduced axis count variant for 2–3 axis turning center applications.
• A05B-2400-C065: Series 18i-A main board; supports up to 6 controlled axes with dual-path PMC architecture.

I/O Link & Digital I/O Modules

• A05B-2400-C070: I/O Link master module; manages distributed I/O communication across the machine tool panel and peripheral devices.
• A05B-2400-C071: Digital input expansion module; 32-point DI interface for operator panel and limit switch integration.
• A05B-2400-C072: Digital output expansion module; 32-point DO interface for relay and solenoid valve control.
• A05B-2400-C073: Combined DI/DO module; 16-point input / 16-point output for compact machine tool panel wiring.
• A05B-2400-C074: High-density I/O module; 64-point DI/DO for large machining center and transfer line applications.

Communication & Network Adapter Modules

• A05B-2400-C080: RS-232C / RS-422 serial communication board; supports DNC program transfer and external device interfacing.
• A05B-2400-C081: Ethernet communication board for FANUC Series 16i/18i; enables network-based program management and remote diagnostics.
• A05B-2400-C082: PROFIBUS-DP slave adapter; integrates FANUC CNC into Siemens and third-party PROFIBUS fieldbus networks.
• A05B-2400-C083: DeviceNet slave communication module for integration with Allen-Bradley and Omron DeviceNet master controllers.

Power Supply Modules

• A05B-2400-C090: Primary DC power supply unit for A05B-2400 control rack; outputs +5V, +12V, +24V regulated rails.
• A05B-2400-C091: Redundant power supply module for high-availability CNC installations in continuous-process manufacturing environments.

Sourcing Hard-to-Find & Obsolete A05B-2400 Parts

Q: Can you support multi-unit or repeat RFQ requests?
A: Yes. Send the model list, target quantity and destination so DRIVEKNMS can review sourcing options and quote the requirement as a project RFQ.

Quality Control for the A05B-2400 Range

Q: How are RFQ terms confirmed?
A: Quantity, required condition, documentation needs, destination and sourcing route are confirmed during RFQ review before quotation.