C98043-A7001-L1 CUD1 motherboard

The Siemens C98043-A7001-L1 is the CUD1 (Control Unit Digital 1) control board for the SIMOREG DC-MASTER 6RA70 DC drive series. It serves as the central processing and control module for DC drive systems, managing armature and field closed-loop control, communication interfaces, and the complete drive parameter set. The CUD1 board contains two microprocessors that handle all open-loop and closed-loop control functions, including armature current and speed regulation, field current control, and the generation of thyristor firing pulses. This module is the "brain" of the 6RA70 drive, holding all drive parameters and configuration data.