Description
The Fanuc A20B-3900-0303 is a specialized FROM/SRAM module designed for the main CPU architecture of Fanuc i-Series Model B CNC controls. This printed circuit board functions as the primary storage medium for system software and user parameters, ensuring data integrity for high-precision industrial automation systems. As a critical component of the control logic, this module integrates directly with the masterboard to facilitate rapid data access and system booting.
Technical Specifications:
Manufacturer: Fanuc Corporation
Part Number: A20B-3900-0303
Component Type: FROM / SRAM Memory Module
System Architecture: Fanuc Series 16i-B, 18i-B, 21i-B
Memory Configuration: Flash ROM (System Software) + SRAM (User Data)
Mounting Interface: Proprietary DIMM Slot
Logic Voltage: 5V DC (via Main Board Bus)
Operating Temperature: 0°C to 55°C
Storage Temperature: -20°C to 60°C
Dimensions: Standard Fanuc PCB Form Factor
Country of Origin: Japan
Condition: Original Engineering Component
Industrial Application:
This memory card is engineered for specific integration within Fanuc 16i/18i/21i-B CNC systems used in multi-axis machining centers and lathes. It serves a dual purpose: the Flash ROM section stores the executive system software required for the boot sequence and servo control logic, while the SRAM section retains critical machine parameters, pitch error compensation data, and ladder logic programs backed by battery power. This component is the primary solution for resolving parity error alarms (900-series) or system boot failures. Ensuring Technical Compatibility with the specific main CPU board version is vital for restoring machine functionality.
Logistics and Support:
Lead Time: Immediate dispatch for critical breakdown recovery
Packaging: Anti-static industrial carton with foam protection
Quality Assurance: 100% Strictly Tested for read/write cycles and data retention
Key Attributes
I/O Number: 1, 8, 32, 128, 16, 64, 256
Memory: ROM, Flash Memory, Eprom, Eeprom, Fram, Ram, I/O Memory, Data Memory
Operating Voltage: 220 V, 110 V, 240 V
Place of Origin: Japan
Brand Name: Fanuc
Application: Electronic Equipment, Industrial Automation, Industrial Control, PLC Programming
Communication Interface: Ethernet, Modbus, Ethercat, Wireless Communication, Can Bus, CC-Link, Profibus, I/O Link, Devicenet, Modubus, Rs485
Type: PAC, PLC, Dedicated Controller
Product name: A20B-3900-0303 Fanuc memory card
Condition: 100% Original
Warranty: 1 Year/ 3 Month
Delivery time: Within 3 days works day
Shipping way: All terms are accepted
Quality: 100% Strictly Tested
Payment term: T/T, credit card
Application: Electronic Equipment
Package: Carton Box with foam
Service: One-stop service
Packaging and Delivery
Selling Units: Single item
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