## Electronic Specifications: M9306-RDS6T The **M9306-RDS6T** is a high-performance, non-spring return electric actuator manufactured by Johnson Controls. It is primarily used to position dampers or valves in HVAC systems. --- ### 1. Key Electrical Specifications The following table outlines the core electronic parameters required for installation and operation: | Parameter | Specification | | :--- | :--- | | **Power Supply** | 24 VAC (nominal) at 50/60 Hz or 24 VDC | | **Input Signal** | Floating (3-point) or On/Off | | **Power Consumption** | 2.5 VA (Operating) / 1.1 W (Holding) | | **Auxiliary Switches** | Two SPDT switches (rated 3A @ 24 VAC) | | **Torque** | 53 lb·in (6 N·m) | | **Runtime** | 60 Seconds for 90° rotation | | **Electrical Connection** | 48 in. (1.2m) Halogen-free cable | --- ### 2. Control Logic & Feedback The "RDS" designation indicates specific electronic features regarding control and feedback: * **Floating Control:** The actuator uses two digital inputs. Powering one wire rotates the actuator clockwise; powering the other rotates it counter-clockwise. When neither is powered, the actuator remains in its last position. * **Integrated Auxiliary Switches (-S models):** This unit includes two internal, field-adjustable switches. These provide electrical feedback to a controller or starter to confirm the damper's physical position (e.g., fully open or fully closed). * **Microprocessor Control:** The internal circuitry uses a brushless DC motor controlled by a microprocessor to ensure constant torque and speed, regardless of load variations. --- ### 3. Wiring Configuration Typical wiring for the M9306-RDS6T involves the following color-coded leads: ```text Standard Control Wiring: - Black (1): Common (24V ~ / -) - Red (2): Power (24V ~ / +) - White (3): Control Input (CW Rotation) - Gray (4): Control Input (CCW Rotation) Auxiliary Switch Wiring (Example): - Yellow/Blue leads: Switch A (Common/NO/NC) - Green/Red leads: Switch B (Common/NO/NC) ``` --- ### 4. Electronic Protection Features * **Overload Protection:** The actuator is electronically protected against stalling. It does not require limit switches; the microprocessor detects when the motor has reached its end-stop and cuts power to prevent burnout. * **Enclosure Rating:** The electronics are housed in an **IP54 (NEMA 2)** rated enclosure, protecting against dust and light water splashing. ---