Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
6561105303F Dialight	LED 1/2" FLAT RED 120AC/DC LEAD	101
6092222130F Dialight	LED PNL MT 9MM 12V BLACK GREEN	20
6561122304F Dialight	1/2" FLT R/G 5VDC W/TERM	122
6092222120F Dialight	LED PNL MT 9MM 6V BLACK GREEN	22
6531103103F Dialight	1/2" FLT SNAP RD 12VDC W/LEADS	287
6771212322F Dialight	7MM HG/G PMI-6VDC W/O-RING	22
5595904003F Dialight	LED PMI SNAP-IN 24V YELLOW 6"	282
5563009304F Dialight	LED PNL MT 1" 230VAC WT DOME WHT	0
6563352203F Dialight	PANEL IND 5V 1/2" DOM ORG W/LEAD	0
5595601007F Dialight	LED PANEL GRN HIEFF SNAP-IN 14"L	2731
6231404304F Dialight	30MM FLTPMI BL 24VDC W/TERM	50
5563507304F Dialight	LED 1" DOME RED PMI 125VCD	9
6551403103F Dialight	LED PANEL INDICATOR BLUE 12V	452
6221301304F Dialight	22MM FLTPMI YLW 12VDC W/TERM	119
6092122120F Dialight	LED PNL MT 9MM 6V BLACK RED	198
6563323303F Dialight	1/2" DOM Y/G 12VDC W/LEAD	41
095131009301 Dialight	LED BASE T3 1/4 MINI PANEL IND	34
6231401304F Dialight	30MM FLTPMI RD 24VDC W/TERM	90
5561903324F Dialight	LED 1" FLAT ORG PMI 12V C1D2	7
6561104304F Dialight	LED 1/2" FLAT RED 24VDC TERM	0

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