The **MA18FAX-R** is a specific part number belonging to a series of industrial-grade micro-switches or sensor modules (typically manufactured by brands like **Omron** or **IDEC**, though common in the **MA series** for safety and sensing applications). Below is the technical breakdown of its electronic characteristics and specifications. --- ## 1. Technical Specifications The following table highlights the primary electrical and mechanical characteristics of the MA18 series (typically non-contact magnetic switches). | Feature | Specification | | :--- | :--- | | **Type** | Non-contact Magnetic Safety Switch | | **Housing Material** | ABS Plastic or Stainless Steel (variant dependent) | | **Contact Configuration** | 1NO (Normally Open) / 1NC (Normally Closed) | | **Max Switching Voltage** | 230V AC / 24V DC | | **Max Switching Current** | 0.5A to 1A | | **Operating Distance** | 7mm to 10mm (Make); 15mm to 20mm (Break) | | **Connection Type** | Pre-wired Cable (R suffix usually denotes Right-angle or specific Cable length) | | **Ingress Protection** | IP67 / IP69K | --- ## 2. Electronic Component Breakdown ### A. Internal Reed Switch Technology The "MA" series generally utilizes **Reed Switches**. These are hermetically sealed glass envelopes containing two ferrous leads. When a magnetic field (from the actuator) is brought near, the leads touch, completing the circuit. * **Benefits:** Protection against oxidation, dust, and moisture. * **Longevity:** High mechanical life since there are no pivoting mechanical parts. ### B. Contact Protection These devices often include internal **Varistors** or **Resistors** to protect the contacts from: * **Inrush Current:** Protecting the thin reed contacts from welding together. * **Back EMF:** Suppressing spikes when switching inductive loads (like small relays). ### C. Wiring Color Codes (Standard) While you should always consult the specific datasheet for your batch, the standard 4-wire configuration for these electronic parts is: 1. **Blue/Black:** Often represents the Normally Open (NO) circuit. 2. **Brown/White:** Often represents the Normally Closed (NC) circuit. --- ## 3. Application Circuit Example In a safety monitoring system, the MA18FAX-R is wired to a **Safety Relay**. The electronics are designed to work in a "dual-channel" mode to ensure that if one contact fails (welds shut), the other will still open the circuit. ```python # Conceptual logic for monitoring an MA18FAX-R sensor def monitor_switch(channel_a, channel_b): if channel_a == "CLOSED" and channel_b == "OPEN": return "System Safe / Door Closed" elif channel_a == "OPEN" and channel_b == "CLOSED": return "System Halted / Door Open" else: return "Fault Detected (Contact Mismatch)" ``` --- ## 4. Part Number Decoder * **MA:** Series designation (Magnetically Actuated). * **18:** Size or housing diameter (18mm barrel or specific form factor). * **F:** Flexible or specific mounting style. * **AX:** Contact configuration (usually 1NO/1NC). * **R:** Often denotes **Rear-entry** cable or a specific **Resistance** value built into the switch for loop monitoring.