DOS 6C2.553.009 Series 2

DOS 6C2.553.009 Series 2 feedback sensor overview

The DOS 6C2.553.009 Series 2 is an aircraft feedback sensor used in automatic control circuits. It measures the movement of a controlled mechanism and sends the corresponding electrical feedback signal to the system. In practical terms, this sensor tells the control unit where the actuator or movable element actually is, not where it was only commanded to be. That difference matters in systems where the final position must be checked through feedback.

DOS 6C2.553.009 Series 2 in the control loop

In the control loop, the sensor converts mechanical displacement into an electrical signal used by the automatic control equipment. The signal can then be compared with the commanded position of the actuator or movable stop. If the actual movement does not match the command, the system can detect the mismatch through the feedback channel. The sensor itself does not drive the actuator and does not set the control law. It only provides position feedback to the connected equipment.

Feedback signal from DOS 6C2.553.009 Series 2

The DOS 6C2.553.009 Series 2 is linked with actuator mechanisms, wiring, control units, and feedback circuits. In SPUU-52 type movable control stop systems, this type of sensor is used to confirm the position of the moving stop after the control unit sends a command. A fault may look like a control unit problem, but the actual cause can be in the sensor, connector, wiring, or mechanical movement of the actuator. For maintenance, the feedback chain should be checked as one system.

Aircraft application of DOS 6C2.553.009 Series 2

The sensor is applied in aircraft automatic control systems, including helicopter control systems, where actuator movement feedback is required. Open technical references connect DOS 6C2.553.009 Series 2 with the SPUU-52 movable control stops system. It may also be used in hydraulic and pneumatic control circuits if the system design requires displacement feedback from an actuator or controlled element. Exact applicability should be checked by aircraft documentation, not only by the general sensor designation.

Identification and ordering checks for DOS 6C2.553.009 Series 2

Before ordering, the marking on the installed sensor should be checked against the aircraft parts catalog, passport, or system documentation. For this item, the documentation reference is Passport 6C2.553.009 PS. A clean request should include the full designation, aircraft type, system name, and a photo of the marking if available. This helps separate the correct Series 2 unit from similar feedback sensors used in other control systems. The product is also known under alternative designation ДОС 6С2.553.009.

Product Type: Feedback sensor
Function: Conversion of mechanical displacement into electrical feedback signal
Application / Where Used: Aircraft automatic control systems
System / Installation Area: Actuator feedback and control circuits
Compatible Aircraft / Equipment: Helicopter control systems
Working Medium: Mechanical displacement / pressure
Measurement Range: 20 to 180 kgf/cm²
Overload Pressure: 265 kgf/cm²
Operating Voltage: 20 V DC
Measurement Error: 4 %
Operating Temperature Range: −40 to +95 °C
Dimensions: 82 × 82 × 78.5 mm
Weight: 350 g
Assigned Resource: 8400 h
Assigned Service Life: 14 years
Technical Documentation: Passport 6C2.553.009 PS

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