Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
6561203303F Dialight	LED 1/2" FLAT GRN 12VDC LEAD	0
6563409303F Dialight	LED 1/2" DOME BLUE 230VAC LEAD	24
5596201027F Dialight	LED PMI SNAP-IN GRN PVC FREE	171
6072312130F Dialight	LED PNL MT 7MM 12V CHROME YEL	292
6823235142F Dialight	LED PANEL INDCATOR GREEN 24V	0
6563353204F Dialight	PANEL IND 12V 1/2" DOM OR W/TERM	69
5586003023F Dialight	LED PMI SNAP-IN BLUE CLR 468NM	563
6772215332F Dialight	7MM HG/G PMI-12VDC W/O-RING	0
6563122304F Dialight	1/2" DOM R/G 5VDC W/TERM	63
556350A204F Dialight	1"DOME RED LED PMI CONST INT	47
6303605304F Dialight	30MM DOM GN 120VAC W/TERM	20
6092222330F Dialight	LED 9MM PMI G 12V BLK HS W GASKT	49
5580803802F Dialight	LED PMI B Y/G ASSY W CNECT	0
24978713331504F Dialight	LED PANEL IND RED 14V CYLINDER	38
6071112330F Dialight	7 MM RED PMI W GASKET	75
24980713333504F Dialight	LED PANEL IND YLW 14V CYLINDER	5
6061211110F Dialight	LED PNL IND 6MM GRN 2V PROTRUD	275
50745381431630F Dialight	LED PANEL NEON RED LONG CTLINDER	28
5580401001F Dialight	LED PANEL INDICATOR ORANGE 1.9V	751
6072212120F Dialight	LED PNL MT 7MM 6V CHROME GREEN	275

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