The 1772-LR Mini PLC-2 processor is a central processing unit that has been designed made by Allen-Bradley/Rockwell Automation and it comes with 120 Volts AC input voltage. It weighs 35 pounds. The processor has 3 diagnostic indicators which are the "PROC RUN," "MEMORY FAULT," and the "STANDBY LOW" indicators. The mode select switch on the module has the "RUN," "TEST," and "PROG" operating modes. It is located in the leftmost slot in the I/O chassis. The processor is made to continuously monitor the input devices and to actuate the output devices according to their status. It can also perform additional operations such as block transfer, arithmetic operations, and I/O forcing applications. The 1772-LR Mini PLC-2 processor has a read/write CMOS memory. It has different types of instructions such as block transfer instructions, EAF instructions, and subroutines to make the user program effective.

The Allen-Bradley 1772-LR Mini PLC-2 processor also offers relay-like instructions and mathematical instructions. The industrial terminals can be used with this module to enter, test edit, and troubleshoot user programs. The diagnostic indicators such as the “PROCESSOR FAULT” indicator illuminate when a run-time error occurs. The processor has a programmable memory. The 1772-LR Mini PLC-2 processor works with different types of input and output devices such as limit switches, pushbutton switches, solenoids, motors or motor starters, and transducers. The controller stores all I/O device status data in the central read-write memory. The processor can perform data manipulation and arithmetic operations. During installation, make sure to leave enough space for proper heat dissipation. This module can be used in different industries for automated processes such as food processing and material handling applications.