Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
31G3-2112T Visual Communications Company, LLC	INCAND PANEL INDICATOR 14V	376
556160A204F Dialight	1"FLAT GRN LED PMI CONST INT	30
1092M6-28V Visual Communications Company, LLC	PMI RND .5" LED 28V WIRE SMALL D	213
5571204203F Dialight	LED MINI PANEL GRN 28V .7" MNT	0
Q6R1CXXY24E APEM Inc.	INDICATOR 24V 6MM RECESSED YEL	0
704.002.7A EAO	(704.002.7AX) INDICATOR/ RND/ W-	8
Q8F1BXXHO02E APEM Inc.	8MM FLSH BLK CHRM HYPR ORG 2VDC	32
M22N-BP-TYA-YD Omron Automation & Safety Services	LED PANEL IND YELLOW 110VAC	0
Q6F1BXXR24E APEM Inc.	INDICATOR 24V 6MM FLUSH RED	0
1092QD6-125VAC Visual Communications Company, LLC	PMI RND .5" LED 125VAC TAB SEMID	61
M22-CG-T1 Omron Automation & Safety Services	PILOT LIGHT SQUARE GRN 110VAC	0
6781135231F Dialight	8MM HR/R PMI-12VDC	152
Q8P1BXXW24E APEM Inc.	INDICATOR 24V 8MM PROMINENT WHT	26
41-NKR12H-CRO Visual Communications Company, LLC	PMI .250" LED 12V TAB CLEAR RED	17
Q8F1BXXR24E APEM Inc.	INDICATOR 24V 8MM FLUSH RED	82
H16F-20R IndustrialeMart	HIGH LED 16MM FLAT 220V RED	19
FL1P-8NW-1-G3V Mallory Sonalert Products	LED GRN 8MM NUT 3VAC/DC STK	154
5583201023F Dialight	LED PMI SNAP-IN YLW/GRN PVC FREE	20
Q8R1BXXY110E APEM Inc.	INDICATOR 110V 8MM RECESSED YEL	0
5571005203F Dialight	LED PNL MT 11/16" 24V WT WHITE	185

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