Allen-Bradley C137898 Keyboard Controller Board

Allen-Bradley C137898 is an assembly keyboard controller board (REV 00) from Rockwell Automation, cataloged as C137898 and cross-listed as 1C137898 in replacement inventories. The board carries internal code A5410 and is identified in some records as 124441, confirming its role as a dedicated keyboard control module for APCS systems. Designed for use within compatible Allen-Bradley APCS control assemblies, it functions as the keyboard input interface that feeds operator commands to the control logic, typically connected to a corresponding APCS controller or terminal in legacy automation equipment. In refurbish and parts catalogs, it appears with references to E20117-1 Rev G, indicating its revision lineage and compatibility context within older Rockwell APCS configurations. This module is intended for use in industrial environments where a purpose-built keyboard controller supports manual input for process control, sequencing, and operator supervision. The combination of part numbers and revision data—C137898, REV00, 1C137898, 124441, and E20117-1 Rev G—provides precise replacement identification for technicians maintaining legacy AB/Rockwell APCS installations.