Siemens 6FX1121-4BD01 is a SINUMERIK 800 SERVO-INTERFACE module that provides a dedicated pathway for servo signals between servo drives and the SINUMERIK 800 control system. This 40 mm wide unit carries the 6FX1121-4BD01 part number and is described in catalog listings as a SINUMERIK 800 SERVO-INTERFACE. It includes one 5-Fach EXE connector to support multiple servo channels. Used in SINUMERIK 800-based CNC and industrial automation setups, it helps integrate servo motors with precise axis control within a compact hardware footprint.
