Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
6161132140F Dialight	LED PANEL MNT 16MM RED 24VDC	118
5593501003F Dialight	LED PANEL RED/GRN SNAP-IN 3LD 6"	0
6563354203F Dialight	PANEL IND 24V 1/2" DOM OR W/LEAD	0
5590103003F Dialight	LED PANEL RED DIFF 12V SNAP 6"LD	0
250873814504 Dialight	CAP TURRET TERMINAL 507 SERIES	103
6563406303F Dialight	LED 1/2" DOME BLUE 28VDC LEAD	1
6303505304F Dialight	30MM DOM RD 120VAC W/TERM	20
80110300332504 Dialight	INDICATOR PRESS TO TEST	24
80110300331504 Dialight	INDICATOR PRESS TO TEST	64
6091312130F Dialight	LED PNL MT 9MM 12V CHROME YELLOW	49
5571103203F Dialight	LED MINI PANEL RED 12V .7" MNT	50
6563124303F Dialight	1/2" DOM R/G 24VDC W/LEAD	48
6073132340F Dialight	LED 7MM RED PMI 24V W GASKET	125
5592301027F Dialight	LED PMI SNAP-IN YLW 14IN LEADS	0
6563209303F Dialight	LED 1/2" DOME GRN 230VAC LEAD	23
6571703303F Dialight	LED 17.46MM YELLOW DIFF PNL MNT	0
6211121304F Dialight	22MM FLTPMI RGB 3VDC W/TERM	182
655-1205-104F Dialight	1/2"FLTSNAP GN120VAC W/TERMS	199
6761411110F Dialight	LED PANEL INDCATOR BLUE 3.3V	0
5592201001F Dialight	LED PANEL GRN DIFF 2.1V SNAP-IN	1002

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