Allen-Bradley 1770-KCB is the official PLC-2 family keytop overlay that attaches to the PLC-2 era keyboard modules to provide the correct legends for entry and operation on programming terminals. Cataloged under Bulletin 1770 as the PLC-2 Family Keytop Overlay, 1770-KCB is designed for use with any PLC-2 family processor, ensuring the keyboard legends match the processor’s command set. This accessory standardizes the function-key mappings for PLC-2 programming and run-time tasks, helping technicians interact with the controller using the familiar key top layouts of the 1770-series keyboard system.
