Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
TLL-87Y-24V-S Floyd Bell, Inc.	PANEL MOUNT YELLOW CONTINUOUS OU	999
KI2XDXXNXX06XXCK APEM Inc.	INDICATR BLK 12V RED (STOP)	0
CNX718N90012T Visual Communications Company, LLC	LED 18MM WHITE 12V TAB PNL MNT	0
Q22P1CXXG24E APEM Inc.	INDICATOR 24V 22MM PROMINENT GRN	0
TLM-87R-930-S Floyd Bell, Inc.	PANEL MOUNT RED CONTINUOUS OUTPU	1000
5590103027F Dialight	LED PMI SNAP-IN RED PVC FREE	223
32R-2111 Visual Communications Company, LLC	NEON PANEL INDICATOR 125V	0
Q6F3BXXG24E APEM Inc.	LED PM INDICATOR FLUSH GRN	219
41W-NKG28H-CGO Visual Communications Company, LLC	PMI .250" LED 28V WIRE CLEAR GRE	13
Q14F3CXXHB110E APEM Inc.	LED PMI FLUSH 110VAC BLUE	0
Q14F1ARXXHR220E APEM Inc.	INDICATOR 220V 14MM FLUSH RED	114
Q8R1CXXW110E APEM Inc.	INDICATOR 110V 8MM RECESSED WHT	0
Q22F1CXXB110E APEM Inc.	INDICATOR 110V 22MM FLUSH BLUE	0
H12F-20R IndustrialeMart	HIGH LED 12MM FLAT 220V RED	45
Q8P1BXXR12E APEM Inc.	INDICATOR 12V 8MM PROMINENT RED	978
UB201KW035D-3JB NKK Switches	INDICATOR PB AMB ILL SQ FLAT CAP	1033
5571104203F Dialight	LED MINI PANEL RED 28V .7" MNT	89
E12R-12G IndustrialeMart	LED 12MM ROUND 12VDC GRN IP67	40
6091222340F Dialight	LED 9MM PMI G 24V BLK HS W GASKT	49
M08R-20G IndustrialeMart	LED 8MM ROUND 220V GREEN	14

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