Bosch 048678-104401 BTS21/E is an interface module for Bosch CNC servo systems, realized as a circuit-board interface that forms part of the Bosch CNC control architecture. The 048678-104401 part number is consistently listed as an "Interface Module for CNC Servo" and is associated with the BTS21/E designation. This module appears in Bosch CNC spare-parts catalogs and third-party listings, including refurbished-offer pages, indicating its role as a CNC servo interface component within Bosch systems. The BTS21/E variant is referenced across multiple listings, underscoring its identification with this Bosch CNC servo interface module.
