Industrial M-4- BOARD M4977 Printed Circuit Board

Industrial M-4- BOARD M4977 Printed Circuit Board is an Acrison‑manufactured display board used as a replacement part in Acrison process-control installations. The part number M4977 (also referenced on some listings as M-4-977 or M4977SB) identifies the same board across multiple distributors. It serves as the visual interface component in compatible Acrison equipment, enabling operators to view system information emitted by the control assembly. As a genuine spare part, it is designed to be swapped in for a failed or aging display board without modifying other circuitry or harnesses. Buyers should verify that their Acrison installation corresponds to the M4977/M-4-977/M4977SB references to ensure compatibility with the surrounding control electronics and display connections.