Panel Indicators, Pilot Lights

Part Number	Description / PDF	Quantity
5595101027F Dialight	LED PMI SNAP-IN RED PVC FREE	0
6781331113F Dialight	8MM HO/O PMI 2VFTYP W/O RES	115
6201201304F Dialight	8MM FLT PMI GRN 3 VDC W/TERMS	112
6563307303F Dialight	1/2" DOM YL 72VDC W/LEAD	0
6091112330F Dialight	LED 9MM RED PMI W GASKET	0
6563358203F Dialight	PANEL IND 37.5V 1/2" DOM OR W/LD	0
5561705304F Dialight	LED PNL MT 1" 125VAC WT FLAT YLW	0
6563357304F Dialight	LED PNL IND ORG 72V IP67/NEMA 4X	7
556170A214F Dialight	1"FLAT YLW LED PMI CONST INT	24
6563208303F Dialight	1/2" DOM GN 37.5VDC W/LEAD	63
6071212320F Dialight	LED 7MM GREEN PMI W GASKET	112400
5580302007F Dialight	IND SNAP-IN PANEL MNT 585NM YLW	2967
6803235132F Dialight	10MM HG/G PMI-12VDC	10
6563352303F Dialight	LED PNL IND ORG 5V IP67/NEMA 4X	27
5593101001F Dialight	LED PANEL RED/GRN SNAP-IN STR	498
5571432203F Dialight	LED PNL MT BI-COLOR YLW/GRN 5V	211
6572504103F Dialight	LED 17.46MM RED DIFF PANEL MOUNT	42
6301804304F Dialight	30MM FLT BL 24VDC W/TERM	10
24979673332504F Dialight	LED PANEL IND GRN 3.6V CYLINDER	63
6231102304F Dialight	30MM FLTPMI RD 3VDC W/TERM	90

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