Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
6563008304F Dialight	1/2" DOM WHT 37.5VDC W/TERM	68
6561107303F Dialight	1/2" FLT RD 72VDC W/LEAD	23
6571702103F Dialight	LED 17.46MM YELLOW DIFF PNL MNT	194
5571503203F Dialight	LED PNL MT 11/16" 12V WT RED	192
6561408304F Dialight	1/2" FLT BL 37.5VDC W/TERM	40
24978411433574 Dialight	PMI NEON DATALITE RED 100K CYL	90
6563303303F Dialight	LED 1/2" DOME YLW 12VDC LEAD	32
6561352304F Dialight	LED PNL IND ORG 5V IP67/NEMA 4X	39
6561007303F Dialight	1/2" FLT WHT 72VDC W/LEAD	57
6552103103F Dialight	LED PANEL INDICATOR RED 12V	221
6571903303F Dialight	LED 17.46MM ORANGE DIFF PNL MNT	0
5591201023F Dialight	LED PMI SNAP-IN YLW PVC FREE	0
5591101001F Dialight	LED PANEL RED DIFF 1.8V SNAP-IN	700
5596104003F Dialight	LED PMI SNAP-IN 24V RED 6"	0
6052211110F Dialight	LED PNL IND 5MM GREEN RECESS	135
6161232120F Dialight	LED PANEL MNT 16MM GREEN 6VDC	0
6563103304F Dialight	LED 1/2" DOME RED 12VDC TERM	31
6091122130F Dialight	LED PNL MT 9MM 12V BLACK RED	58675
5561503304F Dialight	LED PNL MT 1" 12V WT FLAT RED	19
50749573333500F Dialight	LED PANEL IND 5V 20MA AMBER	112

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