The 1772-LP3 PLC-2/30 processor is a central processing unit that has been manufactured by Allen-Bradley/Rockwell Automation. It features 256 words of memory, 896 I/O maximum, and 120 to 240 Volts AC input voltage. The processor weights about 25 pounds. The system configuration for the processor consists of scanners, interface modules, input/output modules, and power supplies. The 1772-LP3 PLC-2/30 processor has a Data Highway compatibility. This processor can be connected to the Allen-Bradley Data Highway or other industry-standard networks. There is a 4-position mode select switch which is located on the front of the processor. The 1772-LP3 PLC-2/30 processor contains a read/write CMOS memory. The user program that contains the operations to be performed can be entered into the memory as a ladder diagram or functional block display format.
