FANUC A20B-2902-0351 768KB Additional SRAM Memory Module

FANUC A20B-2902-0351 Product Overview

The FANUC A20B-2902-0351 is a 768KB additional SRAM module used to expand CNC system memory in compatible legacy FANUC control configurations. It is also described in parts listings as an F16B SRAM module.

FANUC hardware documentation specifies the -0351 as a 768KB SRAM configuration, formed by a 256KB plus 512KB memory arrangement. It is part of the same expanded-SRAM family as the A20B-2902-0350 and A20B-2902-0352.

Verified 768KB SRAM Configuration

• Module Type: Additional SRAM memory module
• Total SRAM Capacity: 768KB
• Memory Arrangement: 256KB + 512KB
• System Function: Expanded CNC system SRAM
• Control Family: Compatible Series 16/18-family hardware

This is an SRAM expansion module, not a DRAM working-memory module, FROM software module or servo-control PCB. The memory type and complete part-number suffix must match the original CNC hardware configuration.

Parameter and Program Restoration

A replacement SRAM module does not contain the original machine’s parameters, programs or builder-specific data. Back up all accessible CNC parameters, programs, offsets, diagnostics, option information, pitch-error compensation data and PMC-related data before removing the original module.

After installation, the required data must be restored using the procedure specified for the CNC and machine tool. If a verified backup is unavailable, consult the machine-tool builder or a qualified FANUC service technician before replacement.

0350, 0351 and 0352 Differences

• A20B-2902-0350: 256KB additional SRAM
• A20B-2902-0351: 768KB additional SRAM
• A20B-2902-0352: 2.25MB additional SRAM

These modules may share a similar physical format but provide different capacities. They should not be interchanged solely as a memory upgrade without confirming the supported CNC software, host board and original system specification.

Compatibility and Revision Check

Before ordering, verify the complete A20B-2902-0351 number, printed revision, CNC series, main-board number and original module position. Compare the component layout and connector contacts with the installed module.

Tested Supply from REACO CNC

REACO CNC can supply the FANUC A20B-2902-0351 subject to current availability. The module number, revision and condition will be confirmed before shipment. Browse our FANUC CNC circuit boards and FANUC CNC and robot parts for related components.

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