The Allen-Bradley 1772-M8 module is a core memory module with a capacity of 8K bits (8192 Words) that is used in PLC-2 processors that are Type 2/20 processors (chassis 1772-LP1, 1772-LP2, and 1772-LP2D4) and Type 2/30 processors (chassis 1772-LP3 and 1772-LP3D4). The unit "8K" represents the maximum memory size of these modules in bits. With the Allen-Bradley 1772-M8 Core Memory Module, it is possible to store a maximum data table size of 8064 words. It weighs 1.5 kilograms (3.31 pounds), it occupies the right-most plastic slot in the processor chassis, and it contains non-removable RAM storage. The installation of this module simply consists of inserting it gently into the corresponding slot, and the module is keyed in order to facilitate the correct installation.

Only properly trained personnel should be allowed to install the Allen-Bradley 1772-M8 Core Memory Module because like any electronic device, it can be damaged by electrostatic discharge. The use of anti-ESD grounding wrist straps is recommended. Before proceeding with the installation of the module, the system power and backup battery should be disconnected. The Allen-Bradley 1772-M8 Core Memory Module is designed in an open construction style, so installing it inside a protective enclosure is key. All preventative measures should be taken in order to avoid the ingress of water, dirt, debris, or other contaminants that are common in industrial facilities. If installed inside a pre-existing panel, it is important to verify if there needs to be a climate control or a forced ventilation system to keep internal temperatures in the enclosure below 50 degrees Celsius. Exposure to higher temperatures during long periods can severely shorten the lifespan of the memory modules.