Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
36EN-2312 Visual Communications Company, LLC	GRN NEON 125 VOLTS	0
1092D6-12V Visual Communications Company, LLC	PMI RND .5" LED 12V WIRE SEMI-DO	33
L60D-A5-W Visual Communications Company, LLC	PMI 5.9MM 583NM AMB 5V WT 6" LD	140
5100H1LC Visual Communications Company, LLC	LED RED 1/4" HOLE LOW CUR PNLMNT	919
3990A1 Visual Communications Company, LLC	LED RED 7/32" HOLE PNL MNT	212
L32R-G24-2112 Visual Communications Company, LLC	LED PANEL INDICATOR GRN 24V	33
34H-0581 Visual Communications Company, LLC	INDCTR LIGHT	500
L58D-G24-W Visual Communications Company, LLC	LED PANEL INDICATOR GRN 24V	89
1092QC3-28V Visual Communications Company, LLC	LED PMI, AMBER, HI-HAT, 28V, 3/1	5
L63DG2L Visual Communications Company, LLC	PMI RND .24 IN LED 3.2 LEADS GRN	1148
41-NKG120-CGO Visual Communications Company, LLC	PMI .250" LED 120V TAB CLEAR GRE	104
6091M7-12V Visual Communications Company, LLC	INDICATOR SOLID STATE YLW PNL MT	0
CD-1-2701-9923-I Visual Communications Company, LLC	PMI DIA .236" (6MM) YELLOW 28V	94
1092QM5-12V Visual Communications Company, LLC	LED PMI, GREEN, SMALL DOME, 12V	31
1090QC4-28V Visual Communications Company, LLC	INCIDATOR INCAND WHITE PANEL MNT	62
41-NKA12H-CAO Visual Communications Company, LLC	PMI .250" LED 12V TAB CLEAR AMBE	25
41W-NKG120-CGO Visual Communications Company, LLC	PMI .250" LED 120V WIRE CLEAR GR	277
5102H3-12V Visual Communications Company, LLC	LED AMBER 1/4" HOLE 12V PAN MNT	320
44-NKR28H-CRO Visual Communications Company, LLC	PMI .250" LED 28V TAB CLEAR RED	19
1090C1-28V Visual Communications Company, LLC	INDICATOR INCAND RED PANEL MNT	100

Panel Indicators, Pilot Lights

1. Overview

Panel indicators and pilot lights are optoelectronic devices that provide visual status feedback in electrical and electronic systems. These components convert electrical signals into light outputs, enabling operators to monitor equipment conditions at a glance. Their importance spans across industrial automation, consumer electronics, transportation, and medical devices, where reliable visual indication ensures operational safety, efficiency, and user interaction.

2. Major Types and Functional Classification

Type	Functional Features	Application Examples
LED Panel Indicators	Low power consumption, long lifespan, instant response	Industrial control panels, HVAC systems
Lamp-based Pilot Lights	High brightness, compatibility with AC/DC circuits	Machinery status indication, heavy-duty equipment
Combined Indicator/Switch	Integrated illumination with manual control	Emergency stop circuits, control desks
Multi-color Indicators	Programmable color outputs for status differentiation	Network routers, medical diagnostic equipment
Remote Indicators	Separate light source and panel module	Automotive dashboards, aerospace control systems

3. Structure and Components

Typical construction includes:

Light Source: LED chips or filament bulbs with specific color/wavelength
Housing: Thermoplastic or metal body with mounting threads (e.g., M20, NPT)
Optical System: Diffused or focused lens for uniform light distribution
Electrical Interface: Screw terminals, PCB pins, or quick-connect terminals
Sealing Elements: Rubber gaskets for IP65+ protection ratings

4. Key Technical Specifications

Parameter	Significance
Operating Voltage Range	Determines compatibility with control circuits (3-480V AC/DC)
Luminous Intensity (cd)	Affects visibility in different lighting conditions
Color Wavelength (nm)	Standardizes visual coding (e.g., 630nm red for warnings)
MTBF (Hours)	Indicates reliability (LED: 50,000-100,000 hours)
IP Rating	Defines environmental protection level
Response Time (ms)	Critical for real-time status monitoring

5. Application Areas

Industrial: CNC machines, PLC control cabinets, factory automation
Transportation: Locomotive control panels, aircraft avionics
Medical: Patient monitors, imaging equipment status indicators
Consumer: Home appliance power indicators, audio equipment
Energy: Solar inverters, smart grid monitoring systems

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Phoenix Contact	ILLINOX series	Modular design, IP69K rating
Omron	XLDC12E-4AH	Ultra-compact LED indicator with 100,000-hour lifespan
Siemens	8WA1000 series	Multi-voltage capability (24-415V AC/DC)
Eaton	Pilot Lights H45K	Shock-resistant filament lamps for heavy-duty use
TE Connectivity	CapLED	Capacitive touch-enabled indicator

7. Selection Recommendations

Key considerations:

Environmental factors: Temperature range (-40 C to +85 C), vibration levels
Electrical compatibility: Voltage matching and circuit type (AC/DC)
Visibility requirements: Ambient light conditions and viewing distance
Certification needs: UL, CE, RoHS compliance for regulatory environments
Mechanical specifications: Panel cutout size (commonly 16/22/30mm)

Example: Selecting an IP67-rated LED indicator with 24V DC operation for a food processing plant's washdown area.

Industry Trends

Emerging developments include:

Integration with IoT systems for smart status monitoring
Miniaturization for high-density panel designs
RGB-LED technology for dynamic color coding
Energy harvesting indicators for self-powered operation
Enhanced durability coatings for extreme environments