---
title: "Safety Door Interlock"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SAFETY_DOOR_INTERLOCK"
  data_integrity_hash: "3e143da1190172e38534bd40d5a4e6fd"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:SAFETY_DOOR_INTERLOCK"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/safety-door-interlock.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/safety-door-interlock"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-2.0 mm gap tolerance, 24 VDC ±10% supply voltage, -20°C to +85°C ambient temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 2.5
    unit: "mm"
    consequence: "Excessive mechanical wear increases contact gap beyond Hall effect sensor detection range, voltage sag below holding coil minimum causes magnetic field collapse, polymer creep at elevated temperatures deforms actuator mechanism"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Mechanical abrasion from door misalignment"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hardened tungsten carbide contact surfaces with 0.1 mm wear allowance"
  - node_2:
      trigger: "Voltage transient from adjacent motor starts"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Dedicated 24 VDC power supply with 100 ms ride-through capacitor bank"
bom_nodes:
  sensor:
    type: "part"
    urn: "URN:CNFX:ME:SENSOR"
    interface_type: "physical-logic-coupled"
  mounting-bracket:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_BRACKET"
    interface_type: "physical-logic-coupled"
  wiring-harness:
    type: "component"
    urn: "URN:CNFX:ME:WIRING_HARNESS"
    interface_type: "physical-logic-coupled"
  actuator:
    type: "part"
    urn: "URN:CNFX:ME:ACTUATOR"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 14119:2013 SAFETY OF MACHINERY - INTERLOCKING DEVICES ASSOCIATED WITH GUARDS"
    scope: "Verified Engineering Specification"
  - standard: "ANSI B11.19-2019 PERFORMANCE REQUIREMENTS FOR RISK REDUCTION AND SAFEGUARDING"
    scope: "Verified Engineering Specification"
  - standard: "EN 1088:1995 SAFETY OF MACHINERY - INTERLOCKING DEVICES ASSOCIATED WITH GUARDS - PRINCIPLES FOR DESIGN AND SELECTION"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/safety-door-interlock.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "2ae7a837565fbc6dc522932cb72bc11c12f5550d6275bd681e70734e6888add3"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Safety Door Interlock

## 1. Technical Definition
A safety device that prevents operation of the high-temperature rinse chamber when the door is open

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-2.0 mm gap tolerance, 24 VDC ±10% supply voltage, -20°C to +85°C ambient temperature**. Failure boundary: **Contact gap &gt;2.5 mm prevents electrical continuity, supply voltage &lt;21.6 VDC causes relay dropout, ambient temperature &gt;90°C degrades polymer components**, Mechanism: **Excessive mechanical wear increases contact gap beyond Hall effect sensor detection range, voltage sag below holding coil minimum causes magnetic field collapse, polymer creep at elevated temperatures deforms actuator mechanism**.

### 2.1 Analytical Physics Model
Governed by the **Thin-Wall Pressure Vessel Stress Analysis**:

> **Primary Equation**: $\sigma_h = \frac{P \cdot D}{2t}$  
> **Engineering Impact**: Determines the hoop stress boundary to prevent rupture.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| P | Internal Pressure | Engineering Constant |
| D | Diameter | Engineering Constant |
| t | Wall Thickness | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Mechanical abrasion from door misalignment | 8 | Contact gap exceeds 2.5 mm threshold | Hardened tungsten carbide contact surfaces with 0.1 mm wear allowance |
| Voltage transient from adjacent motor starts | 8 | Relay coil demagnetization at &lt;21.6 VDC | Dedicated 24 VDC power supply with 100 ms ride-through capacitor bank |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Sensor](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/sensor.md) `(Standalone System)`
- [Actuator](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/actuator.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **High-Temperature Rinse Chamber**, **Programmable Logic Controller (PLC)**, **Safety Relay Module**  
**Downstream Applications**: Industrial Dishwashers, Sterilization Equipment, Food Processing Machinery  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What is the primary function of this safety door interlock?
**A**: It prevents the operation of high-temperature rinse chambers when the door is open, ensuring operator safety by eliminating exposure to hazardous conditions.

### Q: What materials are used in this safety interlock and why?
**A**: Stainless steel for corrosion resistance, engineering plastics for durability and insulation, and copper alloys for reliable electrical conductivity in the wiring components.

### Q: How does this interlock integrate with existing machinery?
**A**: It connects via the included wiring harness and mounts using the bracket, with the sensor detecting door position and the actuator engaging/disengaging the safety mechanism automatically.

## 6. Manufacturing Compliance
- ISO 14119:2013 SAFETY OF MACHINERY - INTERLOCKING DEVICES ASSOCIATED WITH GUARDS
- ANSI B11.19-2019 PERFORMANCE REQUIREMENTS FOR RISK REDUCTION AND SAFEGUARDING
- EN 1088:1995 SAFETY OF MACHINERY - INTERLOCKING DEVICES ASSOCIATED WITH GUARDS - PRINCIPLES FOR DESIGN AND SELECTION

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Safety Door Interlock](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/safety-door-interlock)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: SAFETY_DOOR_INTERLOCK | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 4a90bb1d
