Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
6561406303F Dialight	LED 1/2" FLAT BLUE 28VDC LEAD	35
5596204003F Dialight	LED PMI SNAP-IN 24V GREEN 6"	916
6301605304F Dialight	30MM FLT GN 120VAC W/TERM	18
6823332123F Dialight	12MM HO/O PMI-6VDC	25
5580401027F Dialight	LED PMI SNAP-IN ORANGE PVC FREE	0
5592501007F Dialight	LED SNAP-IN PANEL IND ORANGE	551
5596301007F Dialight	LED PMI SNAP-IN 609NM ORN .250"	0
5595201001F Dialight	LED PANEL GRN DIFF SNAP-IN STR	83
5563006304F Dialight	LED PANEL MT 1" 72V WT DOME WHT	0
6123132140F Dialight	LED PANEL MNT 12MM RED 24VDC	0
6572903303F Dialight	LED 17.46MM ORANGE DIFF PNL MNT	0
6791312333F Dialight	9MM HO/O PMI-12VDC W/O-RING	164
6071212310F Dialight	7 MM GREEN PMI W GASKET	280
5580803007F Dialight	LED 3MM BLUE WHT DIFF PANEL MOUN	4622
6823432124F Dialight	12MM HB/B PMI-6VDC	31
6823135141F Dialight	LED PANEL INDCATOR RED 24V	179
5571442203F Dialight	LED MINI PANEL YELLOW/BLUE 5V	275
6123332120F Dialight	LED PANEL MNT 12MM YELLOW 6VDC	219
6803132221F Dialight	10MM HR/R PMI-6VDC	25
24979683732504F Dialight	LED PANEL IND GRN 5V STOVEPIPE	218

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