Siemens 6FX1-820-0AX12 PLC Module

Siemens 6FX1-820-0AX12 is a Sinumerik memory module designed for the SINUMERIK 810 GA3 and 820 GA3 CNC controls. It is commonly cataloged under order number 6FX1-820-0AX12 and is also listed as 6FX1820-0AX12. This module provides 128 Kbyte of memory capacity, enabling expanded storage for programs and data within the SINUMERIK control system. As part of the 6FX1 module family, it plugs into the SINUMERIK 810/820 backplane and supports integration with Master PLC link modules and other expansion components, helping to extend the controller’s memory footprint in industrial environments. Verified installation references describe it as a standard memory submodule used alongside other SINUMERIK I/O and interface modules, reinforcing compatibility with the 810 GA3/820 GA3 platform. Typical applications include CNC machine tool control and automated production lines that rely on SINUMERIK 810/820 controllers, where larger programs, tool data, and configuration parameters require additional memory capacity to maintain performance and reliability in continuous operation.