---
title: "Interlock Switch"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:INTERLOCK_SWITCH"
  data_integrity_hash: "2b2f8a7da28680777577d034e7f214c0"
  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:INTERLOCK_SWITCH"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/interlock-switch.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/interlock-switch"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-24 VDC, 1-10 mA, -40°C to +85°C ambient temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 100
    unit: "m"
    consequence: "Arcing erosion at contacts due to inductive load switching exceeding 0.5 A, polymer degradation from UV exposure at 300-400 nm wavelengths, mechanical fatigue from &gt;1 million actuation cycles"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Inductive kickback voltage spike exceeding 48 VDC from solenoid disconnection"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "RC snubber circuit with 100 Ω resistor and 0.1 μF capacitor parallel to contacts"
  - node_2:
      trigger: "Corrosive atmosphere with chloride concentration &gt;50 ppm"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hermetically sealed gold-plated contacts with IP67-rated stainless steel housing"
bom_nodes:
  actuator-head:
    type: "part"
    urn: "URN:CNFX:ME:ACTUATOR_HEAD"
    interface_type: "physical-logic-coupled"
  contact-block:
    type: "part"
    urn: "URN:CNFX:ME:CONTACT_BLOCK"
    interface_type: "physical-logic-coupled"
  mounting-bracket:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_BRACKET"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/interlock-switch.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "ec548dc48571a93f21e411ab8e1bf25fc837d73fd8e5a971f7ceccd41e4b4760"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Interlock Switch

## 1. Technical Definition
A safety switch that prevents machine operation when safety barriers or doors are open.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-24 VDC, 1-10 mA, -40°C to +85°C ambient temperature**. Failure boundary: **Contact resistance exceeding 100 mΩ, insulation breakdown below 500 VAC, mechanical wear exceeding 0.5 mm actuator displacement**, Mechanism: **Arcing erosion at contacts due to inductive load switching exceeding 0.5 A, polymer degradation from UV exposure at 300-400 nm wavelengths, mechanical fatigue from &gt;1 million actuation cycles**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Inductive kickback voltage spike exceeding 48 VDC from solenoid disconnection | 8 | Contact welding due to arc persistence &gt;10 ms | RC snubber circuit with 100 Ω resistor and 0.1 μF capacitor parallel to contacts |
| Corrosive atmosphere with chloride concentration &gt;50 ppm | 8 | Contact oxidation increasing resistance to &gt;1 Ω | Hermetically sealed gold-plated contacts with IP67-rated stainless steel housing |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Safety Barrier System**, **Programmable Logic Controller (PLC)**, **Emergency Stop Button**  
**Downstream Applications**: Industrial Machinery, Packaging Equipment, Material Handling Systems  

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

### Q: What is the primary function of an interlock switch in machinery?
**A**: An interlock switch is a safety device that prevents machine operation when safety barriers, doors, or guards are open, ensuring operator safety and compliance with safety regulations.

### Q: What materials are used in this interlock switch construction?
**A**: This interlock switch features a durable stainless steel housing for corrosion resistance, silver alloy contacts for reliable electrical conductivity, and a thermoplastic actuator for mechanical operation.

### Q: How does the interlock switch integrate with machine safety systems?
**A**: The interlock switch connects to the machine's control system, interrupting power or sending a stop signal when the actuator detects an open safety barrier, preventing hazardous operation until properly secured.

## 6. Manufacturing Compliance

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

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: INTERLOCK_SWITCH | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: b058c98a
