---
title: "Limit switches"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:LIMIT_SWITCHES"
  data_integrity_hash: "76699cfbdbbc800cda709fbf1364bc3c"
  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:LIMIT_SWITCHES"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/limit-switches.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/limit-switches"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-10 mm actuation travel, -25°C to +85°C ambient temperature, 10-30 VDC supply voltage, IP67 ingress protection rating"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 5
    unit: "ms"
    consequence: "Contact welding due to inrush currents exceeding 10 A, mechanical fatigue from &gt;10⁷ actuation cycles, dielectric breakdown at &gt;500 V potential difference, plastic deformation from &gt;50 N actuator force"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Inductive load switching without snubber circuit"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "RC snubber network with 100 Ω resistor and 0.1 μF capacitor across contacts"
  - node_2:
      trigger: "Vibration at frequencies matching mechanical resonance (typically 50-200 Hz)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Vibration damping mounting with natural frequency below 30 Hz, spring-loaded actuator with &gt;2 N preload"
bom_nodes:
  actuator-head:
    type: "part"
    urn: "URN:CNFX:ME:ACTUATOR_HEAD"
    interface_type: "physical-logic-coupled"
  switch-bodyhousing:
    type: "component"
    urn: "URN:CNFX:ME:SWITCH_BODYHOUSING"
    interface_type: "physical-logic-coupled"
  electrical-contacts:
    type: "component"
    urn: "URN:CNFX:ME:ELECTRICAL_CONTACTS"
    interface_type: "physical-logic-coupled"
  terminal-block:
    type: "part"
    urn: "URN:CNFX:ME:TERMINAL_BLOCK"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/limit-switches.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "7f28c50de8d38341a3dfdd5c09c554d78478b048c3504fa0e0680e961bc5a078"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Limit switches

## 1. Technical Definition
Safety and control devices that detect the end positions of a linear actuator's stroke.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-10 mm actuation travel, -25°C to +85°C ambient temperature, 10-30 VDC supply voltage, IP67 ingress protection rating**. Failure boundary: **Contact bounce exceeding 5 ms duration, insulation resistance dropping below 100 MΩ at 500 VDC, actuator overtravel exceeding 150% of rated travel, operating temperature exceeding 125°C**, Mechanism: **Contact welding due to inrush currents exceeding 10 A, mechanical fatigue from &gt;10⁷ actuation cycles, dielectric breakdown at &gt;500 V potential difference, plastic deformation from &gt;50 N actuator force**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Inductive load switching without snubber circuit | 8 | Contact arcing leading to carbon deposition and increased contact resistance | RC snubber network with 100 Ω resistor and 0.1 μF capacitor across contacts |
| Vibration at frequencies matching mechanical resonance (typically 50-200 Hz) | 8 | False triggering due to contact chatter | Vibration damping mounting with natural frequency below 30 Hz, spring-loaded actuator with &gt;2 N preload |

## 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)`
- [Terminal Block](https://cnfx.com/llms/industry/electrical-equipment-manufacturing/product/terminal-block.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Linear Actuators**, **Programmable Logic Controllers (PLCs)**, **Industrial Control Panels**  
**Downstream Applications**: Packaging Machinery, Material Handling Systems, Automated Assembly Lines  

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

### Q: What are the key safety features of these limit switches?
**A**: These limit switches provide critical safety by detecting the end positions of linear actuator strokes, preventing over-travel and potential machinery damage. The durable thermoplastic housing and metal actuator arm ensure reliable operation in industrial environments.

### Q: How do the silver alloy contacts improve switch performance?
**A**: Silver alloy contacts offer superior electrical conductivity and corrosion resistance, ensuring consistent signal transmission and longer service life compared to standard contacts. This reduces maintenance frequency and improves reliability in machinery applications.

### Q: What types of machinery are these limit switches suitable for?
**A**: These limit switches are ideal for various machinery and equipment manufacturing applications including CNC machines, automated assembly lines, material handling systems, packaging equipment, and industrial robots where precise position detection is required.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Limit switches](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/limit-switches)**

### 🌐 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**: LIMIT_SWITCHES | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: bc8299e9
