Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
6561205303F Dialight	LED 1/2" FLAT GRN 120AC/DC LEAD	130
6083131110F Dialight	LED PNL IND 8MM RED LOCKWASH/NUT	0
24978673331504F Dialight	LED PANEL IND RED 3.6V CYLINDER	797
6571703103F Dialight	LED 17.46MM YELLOW DIFF PNL MNT	22
5586203802F Dialight	LED PMI SNP IN INGAN G 14"	382
656120A304F Dialight	1/2" FLT GRN 48VDC W/TERMS	0
6563357203F Dialight	PANEL IND 72V 1/2" DOM OR W/LEAD	0
556370A204F Dialight	1"DOME YLW LED PMI CONST INT	24
6231302304F Dialight	30MM FLTPMI YLW 12VDC W/TERM	90
50747613331500F Dialight	LED PANEL IND 28V 15MA RED	94
6561305303F Dialight	LED 1/2" FLAT YLW 120AC/DC LEAD	0
5590102001F Dialight	LED PANEL RED DIFF 5V SNAP-IN	876
5580102001F Dialight	LED PANEL IND RED DIFF SNAP-IN	1096
6563007304F Dialight	1/2" DOM WHT 72VDC W/TERM	50
5590302027F Dialight	LED PMI SNAP-IN YLW PVC FREE	473
6061415130F Dialight	LED PNL IND 6MM R,G 12V PROTRUD	244
6571702303F Dialight	LED 17.46MM YELLOW DIFF PNL MNT	0
6781412324F Dialight	8MM HB/B PMI-6VDC W/O-RING	123
6571604103F Dialight	LED 17.46MM GREEN DIFF PANEL MNT	91
5580201027F Dialight	LED PMI .158" GREEN PVC FREE	186

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