Status Indicator (LED): Voltage 2.0-3.3V DC, Current 10-20mA

Q: What do different LED colors indicate on digital output modules?

Red typically indicates active output or fault conditions, green shows normal operation or ready status, yellow/amber warns of pending actions or marginal conditions, and blue may indicate communication activity or special modes.

Q: How do I troubleshoot a non-functioning status LED?

Check power supply to the module, verify output channel configuration, test with known working signals, inspect for physical damage, and measure voltage at LED terminals. Replace if internal driver circuit or LED itself has failed.

Component Specifications

Definition

A solid-state light-emitting diode (LED) component integrated into digital output modules to provide visual status indication of output channel states, such as active/inactive, fault conditions, or communication status, in industrial control systems.

Working Principle

Operates by converting electrical signals from the digital output module's control circuit into visible light through electroluminescence in a semiconductor diode, with brightness and color indicating specific operational states.

Materials

Semiconductor materials (typically gallium arsenide phosphide or indium gallium nitride), epoxy resin encapsulation, copper alloy leads, and aluminum or ceramic substrate.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Color	Red/Green/Yellow/Blue
Current	10-20mA
Voltage	2.0-3.3V DC
Lifespan	50,000-100,000 hours
Brightness	100-500 mcd
Response Time	<100 ns
Viewing Angle	120-160 degrees
Operating Temperature	-40°C to +85°C

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

Standards

ISO 7000, IEC 60073, DIN EN 60073

Parent Products

This component is used in the following industrial products

Digital Output Module

A PLC/I/O module that converts digital control signals from the station controller into discrete on/off electrical outputs to activate external devices.

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Engineering Analysis

Risks & Mitigation

Overcurrent damage
Heat degradation
Moisture ingress
Vibration failure
Color misinterpretation

FMEA Triads

Trigger: Excessive forward current
Failure: LED burnout or premature dimming
Mitigation: Implement current-limiting resistors, use constant current drivers, and follow manufacturer's specifications

Trigger: Environmental contamination
Failure: Reduced light output or complete failure
Mitigation: Use IP-rated enclosures, apply conformal coating, and maintain clean operating environments

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±5% current regulation, ±10% brightness variation

Test Method

IEC 60068-2 environmental testing, MIL-STD-202 vibration testing, photometric measurement per CIE standards

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Status Indicator (LED)

Manufacturer profiles associated with Status Indicator (LED).

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What do different LED colors indicate on digital output modules?