The **8502SCO2V02SX01_V01** is a specific configuration of a Square D (Schneider Electric) NEMA-rated magnetic contactor. These devices are used to switch electrical power circuits, typically for motor control or lighting loads. Below is a breakdown of the electronic and electromechanical parts of this specific model. ### 1. Component Identification Table | Feature | Specification | Description | | :--- | :--- | :--- | | **Series** | 8502 | NEMA Magnetic Contactor | | **Size** | S | NEMA Size 1 (27 Amperes) | | **Type** | CO | 3-Pole, Open Style (No enclosure) | | **Coil Voltage** | V02 | 120V AC @ 60Hz / 110V AC @ 50Hz | | **Auxiliary Contacts**| SX01 | 1 Normally Closed (NC) internal aux contact | | **Revision** | V01 | Specific factory modification or series revision | --- ### 2. Key Internal Electronic/Electromechanical Parts #### A. The Magnetic Coil (V02) The heart of the contactor is the electromagnetic coil. * **Function:** When 120V AC is applied, the coil creates a magnetic field that pulls the armature down. * **Construction:** Thousands of turns of fine copper wire wound around a plastic bobbin. * **Maintenance:** This is a replaceable part (Service part #31041-400-42). #### B. Power Contacts The "S" size indicates NEMA Size 1 contacts. * **Material:** Typically silver-cadmium oxide alloy to resist welding and arcing. * **Configuration:** 3-Pole Single Throw (3PST). * **Rating:** Rated for 27A continuous current and up to 7.5 HP at 230V or 10 HP at 460V. #### C. Auxiliary Contacts (SX01) * **Role:** These are low-power contacts used for signaling (e.g., telling a PLC the status or turning on an indicator light). * **Configuration:** The "X01" suffix indicates one **Normally Closed (NC)** contact is included in the assembly. #### D. The Armature and Magnet Frame * **Material:** Laminated silicon steel. * **Shading Coils:** Small copper loops embedded in the magnet face to prevent "chatter" or humming by maintaining a magnetic hold during the AC zero-crossing. --- ### 3. Wiring Diagram Overview | Terminal Label | Function | Voltage/Type | | :--- | :--- | :--- | | **L1, L2, L3** | Power Input | High Voltage Line | | **T1, T2, T3** | Load Output | To Motor/Heater | | **A1, A2** | Coil Terminals | 120V AC Control Signal | | **NC Terminals** | Aux Contact | Logic/Status Signal | --- ### 4. Technical Summary This unit is an **Open Type** contactor, meaning it is intended to be mounted inside a larger control panel. It does **not** include an integrated thermal overload relay; if motor protection is required, an 8536 series (starter) or a separate LR9 series overload block must be added.