GE Fanuc's 6 Series PLC was introduced in the early 1980's and was the first modular PLC. It is estimated that over 500,000 of these units have been installed all over the world. Available in different configurations (Model 60, Model 600 and Model 6000). The three versions of the CPU allowed more memory and higher I / O capability. The instruction set was identical to the I / O type.
The GE Fanuc Six Series programmable controllers are specifically designed for operation in difficult industrial environments.