System СДУ-Д-2А is intended for remote control of aircraft engine operation modes:

from potentiometric transducers of TCL position when operating with the main servo channel of system control, with additional control function implemented as per signals from the aircraft ICS
from backup controls of the redundant relay control channel of the system (in case of the main channel failure)

Components of system СДУ-Д-2А:

drive control unit БУП-Д-2А;
mounting frame РМ-БУП-Д-2А;
electric actuator МРД-Д-2А;
block of TCL position transducers.