The **17AC-A56-R** is a specific model within the **Honeywell AC Series** of door interlock switches. These components are primarily used in security and industrial applications to ensure that equipment cannot operate unless a door or panel is securely closed. --- ### 1. Key Technical Specifications The following table outlines the core electronic and mechanical parameters of the 17AC-A56-R: | Parameter | Specification | |:---|:---| | **Switch Type** | Door Interlock / Pushbutton | | **Circuitry** | SPDT (Single Pole Double Throw) | | **Current Rating** | 5 Amps | | **Voltage Rating** | 125 VAC / 250 VAC | | **Actuator Style** | Rod / Plunger | | **Termination Style** | Solder Terminals | | **Mounting Type** | Panel Mount | --- ### 2. Functional Characteristics The 17AC-A56-R is designed for high reliability in "cheat-resistant" environments. Key features include: * **Momentary Action:** The switch returns to its original state once the force on the plunger is removed. * **Dual Functionality:** Because it is SPDT, it can be wired for either "Normally Open" (NO) or "Normally Closed" (NC) configurations, or both to toggle between two circuits. * **"Pull-to-Override" Feature:** A distinctive trait of the AC series is the manual override. Maintenance personnel can pull the plunger out to keep the circuit active while the door is open for testing purposes. --- ### 3. Internal Components and Construction The assembly consists of several sub-parts integrated into a single housing: 1. **Basic Switch:** Internally, it utilizes a high-precision snap-action microswitch (often from the Honeywell SM series). 2. **Stainless Steel Bracket:** Provides the structural rigidity needed for panel mounting. 3. **Plunger/Rod:** Made of durable thermoplastic or metal designed to withstand repeated mechanical impacts from heavy doors. 4. **Spring Mechanism:** Ensures the snap-action reset occurs instantly to prevent electrical arcing. --- ### 4. Common Applications * **Vending Machines:** To cut power when the front panel is opened. * **Appliances:** Used in microwave doors or dryers. * **Industrial Enclosures:** Disconnecting high-voltage power to a control cabinet when the door is serviced. * **Office Equipment:** Integrated into large photocopiers and printers to prevent operation during paper jam removal.