Editorial Technical Reference

Optical Port (IR)

This page explains how Optical Port (IR) is classified within Electrical Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

An infrared optical communication interface on an energy meter for data transmission and configuration.

Product Specifications

Technical details and manufacturing context for Optical Port (IR)

Definition
The infrared optical port is a component integrated into energy meters that enables wireless data communication using infrared light. It serves as a standardized interface for meter reading, configuration updates, diagnostics, and data retrieval without physical electrical connections, providing isolation and security benefits. The port typically consists of an infrared LED transmitter and a photodiode receiver, housed behind a polycarbonate optical window. Data is transmitted by modulating the infrared light at a carrier frequency, commonly 36–38 kHz, and the receiver converts the light pulses back into electrical signals for the meter's microcontroller. The optical port operates over a short range, typically up to 4 meters, and supports data rates from 9600 to 115200 bps, as specified in IEC 62056-21. It is designed for indoor use within specified environmental limits, including operating temperatures from -25°C to 55°C and storage from -40°C to 70°C, with relative humidity up to 95% non-condensing. The ingress protection rating depends on the meter enclosure, typically IP54 to IP65. The port is powered internally by the meter, with a supply voltage of 3.3–5 V DC and current consumption of 10–50 mA during active transmission. The radiant intensity ranges from 20 to 200 mW/sr, and receiver sensitivity is -30 to -20 dBm. The module dimensions are approximately 20×15×10 mm, and weight including connector is 10–30 g. These values are reference ranges; actual specifications must be verified with the manufacturer for the specific meter model. The optical port is a key component for automated meter reading (AMR) and manual reading with handheld devices, ensuring reliable data exchange without physical contact.
Working Principle
The optical port uses an infrared LED transmitter and photodiode receiver pair. Data is encoded as modulated infrared light pulses (typically at 38kHz carrier frequency) that travel through air or optical guides. The receiver converts these light pulses back into electrical signals for processing by the meter's microcontroller.
Common Materials
Infrared LED (GaAs/GaAlAs), Silicon photodiode, Polycarbonate optical window, PCB substrate
Technical Parameters
ParameterTypical rangeNotes & selection driver
Wavelength900–1000 nmStandard IR communication wavelengthIEC 62056-21
Transmission Distance0–4 mMaximum distance for reliable communication
Data Rate9600–115200 bpsBaud rate for optical portIEC 62056-21
Carrier Frequency36–38 kHzModulation frequency for IR signalIEC 62056-21
Operating Temperature-25–55 °CExtended range available on requestIEC 62052-31
Storage Temperature-40–70 °CNon-operating conditionIEC 62052-31
Relative Humidity0–95 %Non-condensingIEC 60068-2-78
Ingress ProtectionIP54–IP65Depends on meter enclosureIEC 60529
Supply Voltage3.3–5 V DCInternal power from meter
Current Consumption10–50 mADuring active transmission
Radiant Intensity20–200 mW/srEnsures receiver sensitivityIEC 62056-21
Receiver Sensitivity-30–-20 dBmMinimum signal for reliable reception
Dimensions20×15×10 mmTypical module size
Weight10–30 gIncluding connector

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Infrared LED Part
    Transmits modulated infrared light signals carrying data
    Material: Gallium arsenide (GaAs) semiconductor
  • Photodiode Receiver
    Detects incoming infrared signals and converts them to electrical signals
    Material: Silicon semiconductor
  • Optical Window Part
    Protects internal components while allowing infrared light transmission
    Material: Polycarbonate or optical-grade plastic
  • Driver Circuit
    Controls LED modulation and signal conditioning for the receiver
    Material: PCB with integrated circuits

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Optical Port (IR).

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (non-pressurized optical interface)
other spec: IR wavelength: 850-950 nm, Data rate: up to 115.2 kbps, Operating distance: 0-2 m
temperature: -40°C to +85°C
Media Compatibility
✓ Indoor air (clean, dry) ✓ Plastic/metal meter housings ✓ Glass/transparent polymer covers
Unsuitable: Direct sunlight or strong ambient IR interference
Sizing Data Required
  • Required communication distance (meters)
  • Data transmission rate (bps)
  • Environmental sealing/IP rating requirement

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Lens Contamination
Cause: Accumulation of dust, oil mist, or process debris on the optical surface, blocking or scattering infrared light transmission.
Sensor Degradation
Cause: Thermal stress or prolonged exposure to high ambient temperatures, leading to drift in calibration or reduced sensitivity of the IR detector.
Maintenance Indicators
  • Erratic or fluctuating readings despite stable process conditions
  • Visible accumulation of foreign material on the lens or port window
Engineering Tips
  • Implement routine cleaning with approved, lint-free wipes and optical-grade solvents to prevent permanent contamination buildup
  • Ensure proper cooling or thermal management around the installation to maintain the IR sensor within its specified operating temperature range

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 10110-7:2017 (Optics and photonics - Preparation of drawings for optical elements and systems - Surface imperfection tolerances) ANSI Z136.1 (Safe Use of Lasers) DIN 58196-2 (Optical components - Optical ports - Part 2: Dimensions and tolerances)

Quoted from the published standard.

Manufacturing Precision
  • Bore diameter: +/-0.01mm
  • Surface flatness: λ/4 at 632.8nm
Quality Inspection
  • Interferometric surface flatness test
  • Spectroscopic transmission/reflection measurement

Manufacturers of Optical Port (IR)

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Frequently Asked Questions

What is the typical transmission distance of an infrared optical port?

The typical transmission distance is up to 4 meters, as listed in the reference parameters. However, actual distance may vary depending on environmental conditions and the specific meter design. Always verify with the manufacturer for the exact model.

What standards apply to the infrared optical port?

The optical port parameters reference IEC 62056-21 for communication characteristics, IEC 62052-31 for temperature ranges, IEC 60068-2-78 for humidity, and IEC 60529 for ingress protection. These standards are procurement references; compliance must be confirmed with the supplier.

Can the optical port be used for configuration and firmware updates?

Yes, the optical port is designed for data transmission and configuration. It allows meter reading, configuration updates, diagnostics, and data retrieval without physical electrical connections. However, the specific capabilities depend on the meter's firmware and software.

What are the environmental limits for the optical port?

The reference operating temperature is -25°C to 55°C, storage temperature -40°C to 70°C, and relative humidity up to 95% non-condensing. Ingress protection is typically IP54 to IP65, depending on the meter enclosure. Always check the manufacturer's specifications for the actual model.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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