---
title: "Safety Interlock Switch"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SAFETY_INTERLOCK_SWITCH"
  data_integrity_hash: "a9f81a139b790754f4cb2bcb4ca23827"
  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_INTERLOCK_SWITCH"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/safety-interlock-switch.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/safety-interlock-switch"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-10.0 N actuation force, -40°C to +85°C ambient temperature, 24V DC ±10% supply voltage, IP67 ingress protection rating"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 12.0
    unit: "N"
    consequence: "Contact welding occurs due to Joule heating (I²R) exceeding 2.5W at 30V DC, creating localized temperatures above 1500°C that melt silver-cadmium oxide contacts; polymer seal failure follows Arrhenius equation with activation energy of 0.65 eV for nitrile rubber degradation"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Contact contamination by 0.1μm conductive particles exceeding 1000 particles/cm³"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hermetic sealing with 99.99% pure nitrogen atmosphere at 1.2 bar positive pressure"
  - node_2:
      trigger: "Actuator misalignment exceeding 0.5mm perpendicular to switch face"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Precision-machined stainless steel guide bushings with 0.01mm clearance tolerance"
bom_nodes:
  actuator:
    type: "part"
    urn: "URN:CNFX:ME:ACTUATOR"
    interface_type: "physical-logic-coupled"
  switch-body:
    type: "component"
    urn: "URN:CNFX:ME:SWITCH_BODY"
    interface_type: "physical-logic-coupled"
  electrical-contacts:
    type: "component"
    urn: "URN:CNFX:ME:ELECTRICAL_CONTACTS"
    interface_type: "physical-logic-coupled"
  mounting-bracket:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_BRACKET"
    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/ASSE Z244.1-2016 CONTROL OF HAZARDOUS ENERGY - LOCKOUT/TAGOUT AND ALTERNATIVE METHODS"
    scope: "Verified Engineering Specification"
  - standard: "DIN EN 60947-5-1:2017 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 5-1: CONTROL CIRCUIT DEVICES AND SWITCHING ELEMENTS - ELECTROMECHANICAL CONTROL CIRCUIT DEVICES"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/safety-interlock-switch.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "25ddea6d05bdb908eab6301d3d27d87a8836dee4069c96616dbcf3c8af3b6953"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Safety Interlock Switch

## 1. Technical Definition
A safety device that prevents access to hazardous areas of machinery until all safety conditions are met.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-10.0 N actuation force, -40°C to +85°C ambient temperature, 24V DC ±10% supply voltage, IP67 ingress protection rating**. Failure boundary: **Actuation force exceeding 12.0 N causes mechanical deformation, temperature beyond -50°C/+100°C causes polymer seal hardening/cracking, voltage exceeding 30V DC causes contact welding**, Mechanism: **Contact welding occurs due to Joule heating (I²R) exceeding 2.5W at 30V DC, creating localized temperatures above 1500°C that melt silver-cadmium oxide contacts; polymer seal failure follows Arrhenius equation with activation energy of 0.65 eV for nitrile rubber degradation**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Contact contamination by 0.1μm conductive particles exceeding 1000 particles/cm³ | 8 | Intermittent contact resistance increase from 50mΩ to &gt;500mΩ | Hermetic sealing with 99.99% pure nitrogen atmosphere at 1.2 bar positive pressure |
| Actuator misalignment exceeding 0.5mm perpendicular to switch face | 8 | Mechanical binding preventing full 4.0mm actuator travel | Precision-machined stainless steel guide bushings with 0.01mm clearance tolerance |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Programmable Logic Controller (PLC)**, **Safety Relay Module**, **Emergency Stop Button**  
**Downstream Applications**: Industrial Robots, Packaging Machinery, Metal Forming Presses  

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

### Q: What materials are used in this safety interlock switch?
**A**: This safety interlock switch is constructed from engineering plastic, stainless steel, and copper alloy components for optimal durability and reliability in industrial environments.

### Q: How does a safety interlock switch prevent machinery accidents?
**A**: The safety interlock switch prevents access to hazardous machinery areas until all safety conditions are met, ensuring operators cannot enter dangerous zones during operation.

### Q: What are the main components of this safety interlock switch?
**A**: Key components include the actuator, switch body, electrical contacts, and mounting bracket, designed for easy installation and maintenance in machinery applications.

## 6. Manufacturing Compliance
- ISO 14119:2013 SAFETY OF MACHINERY - INTERLOCKING DEVICES ASSOCIATED WITH GUARDS
- ANSI/ASSE Z244.1-2016 CONTROL OF HAZARDOUS ENERGY - LOCKOUT/TAGOUT AND ALTERNATIVE METHODS
- DIN EN 60947-5-1:2017 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 5-1: CONTROL CIRCUIT DEVICES AND SWITCHING ELEMENTS - ELECTROMECHANICAL CONTROL CIRCUIT DEVICES

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

### 🌐 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_INTERLOCK_SWITCH | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 7cd943cb
