---
title: "User Interface (Display/Buttons)"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:USER_INTERFACE_DISPLAYBUTTONS"
  data_integrity_hash: "699a7332a1bf04521c19674b42696552"
  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:USER_INTERFACE_DISPLAYBUTTONS"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/user-interface-displaybuttons.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/user-interface-displaybuttons"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-100% brightness at 400-700 nm wavelength, 5-24 VDC input voltage, -20°C to +70°C ambient temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 30
    unit: "°C"
    consequence: "Liquid crystal phase transition at temperature extremes (nematic-isotropic transition at 85°C), contact wear due to Archard's wear equation (K=2.5×10⁻⁷ for silver alloy contacts)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Electrostatic discharge exceeding 8 kV (Human Body Model)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "TVS diodes with 5 pF capacitance and 3.3 V clamping voltage on all button matrix lines"
  - node_2:
      trigger: "Condensation forming at 80% RH with 10°C temperature differential"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Conformal coating with 0.1 mm thickness and 10¹⁵ Ω·cm volume resistivity"
bom_nodes:
  display-screen:
    type: "part"
    urn: "URN:CNFX:ME:DISPLAY_SCREEN"
    interface_type: "physical-logic-coupled"
  button-membrane:
    type: "component"
    urn: "URN:CNFX:ME:BUTTON_MEMBRANE"
    interface_type: "physical-logic-coupled"
  tactile-dome-switches:
    type: "component"
    urn: "URN:CNFX:ME:TACTILE_DOME_SWITCHES"
    interface_type: "physical-logic-coupled"
  pcb-with-controller:
    type: "part"
    urn: "URN:CNFX:ME:PCB_WITH_CONTROLLER"
    interface_type: "physical-logic-coupled"
  bezelfront-panel:
    type: "component"
    urn: "URN:CNFX:ME:BEZELFRONT_PANEL"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9241-210:2019 (ERGONOMICS OF HUMAN-SYSTEM INTERACTION)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/HFES 100-2007 (HUMAN FACTORS ENGINEERING OF COMPUTER WORKSTATIONS)"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING (EU DIRECTIVE 2014/35/EU FOR ELECTRICAL EQUIPMENT SAFETY)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/user-interface-displaybuttons.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "a1b1b510cb098495f236780e206cdf412adbb51ebdfc87381fd271f6e2a997fe"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: User Interface (Display/Buttons)

## 1. Technical Definition
The human-machine interface component of a tension controller/regulator, consisting of a display screen and control buttons for monitoring and adjusting tension parameters.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-100% brightness at 400-700 nm wavelength, 5-24 VDC input voltage, -20°C to +70°C ambient temperature**. Failure boundary: **LCD display fails at -30°C (crystallization) or +85°C (liquid crystal decomposition), button contacts fail after 1,000,000 actuations at 50 mA**, Mechanism: **Liquid crystal phase transition at temperature extremes (nematic-isotropic transition at 85°C), contact wear due to Archard's wear equation (K=2.5×10⁻⁷ for silver alloy contacts)**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Electrostatic discharge exceeding 8 kV (Human Body Model) | 8 | Microcontroller I/O pin latch-up at 1.5 A holding current | TVS diodes with 5 pF capacitance and 3.3 V clamping voltage on all button matrix lines |
| Condensation forming at 80% RH with 10°C temperature differential | 8 | LCD segment driver short circuit at 0.5 mA leakage current | Conformal coating with 0.1 mm thickness and 10¹⁵ Ω·cm volume resistivity |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Display Screen](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/display-screen.md) `(Standalone System)`
- [PCB with Controller](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/pcb-with-controller.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Tension Controller/Regulator Unit**, **Power Supply Unit**, **Mounting Hardware Kit**  
**Downstream Applications**: Web Handling Machinery, Printing Presses, Textile Manufacturing Equipment  

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

### Q: What materials are used in this tension controller interface?
**A**: This HMI component features a polycarbonate/ABS plastic bezel, glass display screen, and silicone rubber button membranes for durability in industrial environments.

### Q: How does this interface help with tension regulation?
**A**: The display provides real-time tension monitoring while tactile buttons allow operators to precisely adjust parameters like setpoints, speed, and calibration for optimal material handling.

### Q: Is this interface compatible with existing tension control systems?
**A**: Yes, the PCB controller is designed for integration with standard tension regulators, featuring common communication protocols and mounting configurations for machinery manufacturing applications.

## 6. Manufacturing Compliance
- ISO 9241-210:2019 (ERGONOMICS OF HUMAN-SYSTEM INTERACTION)
- ANSI/HFES 100-2007 (HUMAN FACTORS ENGINEERING OF COMPUTER WORKSTATIONS)
- CE MARKING (EU DIRECTIVE 2014/35/EU FOR ELECTRICAL EQUIPMENT SAFETY)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: User Interface (Display/Buttons)](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/user-interface-displaybuttons)**

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

> **Reference ID**: USER_INTERFACE_DISPLAYBUTTONS | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: eccf66c7
