Alarm Output Relay

Product Specifications

Technical details and manufacturing context for Alarm Output Relay

Definition

The Alarm Output Relay is a component used in electrical equipment manufacturing, specifically within safety monitoring subsystems. It serves as an interface between monitoring equipment and external alarm devices. When the safety monitoring system detects a hazardous condition or threshold violation, it sends a signal to this relay, which then physically closes or opens its contacts to activate audible alarms, visual indicators, emergency shutdown systems, or notification devices. The relay operates as an electrically controlled switch. When the safety monitoring subsystem detects an alarm condition, it sends a low-voltage control signal to the relay coil. This creates a magnetic field that moves the relay's armature, causing the contacts to change state (normally open contacts close, or normally closed contacts open). This contact change completes or interrupts the circuit to external alarm devices, activating them. The relay is available with a contact rating of 10–30 A at 250 V AC, a coil voltage of 12–24 V DC, and a coil power consumption of 0.9–1.8 W. Contact resistance is ≤50 mΩ at 6 V DC, 1 A, and insulation resistance is ≥1000 MΩ between coil and contacts at 500 V DC. Dielectric strength is 1500–2500 V AC between coil and contacts for 1 minute. Operating temperature range is -40 to 70 °C. Mechanical life is ≥10^7 operations (no load), and electrical life is ≥10^5 operations at rated resistive load. Response time and release time are both ≤20 ms. Degree of protection is IP54–IP65 per IEC 60529, and weight is 30–80 g. Materials include copper, plastic, and steel. These values are reference ranges; verify model-specific specifications with the manufacturer or supplier.

Working Principle

The relay operates as an electrically controlled switch. When the safety monitoring subsystem detects an alarm condition, it sends a low-voltage control signal to the relay coil. This creates a magnetic field that moves the relay's armature, causing the contacts to change state (normally open contacts close, or normally closed contacts open). This contact change completes or interrupts the circuit to external alarm devices, activating them.

Common Materials

Copper, Plastic, Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Contact Rating	10–30 A	Maximum switching current at 250 V AC
Coil Voltage	12–24 V DC	Standard control voltage range
Coil Power Consumption	0.9–1.8 W	At nominal coil voltage
Contact Resistance	≤50 mΩ	Initial value at 6 V DC, 1 A
Insulation Resistance	≥1000 MΩ	Between coil and contacts at 500 V DC
Dielectric Strength	1500–2500 V AC	Between coil and contacts for 1 minute
Operating Temperature	-40–70 °C	Ambient temperature range
Mechanical Life	≥10^7 operations	No load switching
Electrical Life	≥10^5 operations	At rated resistive load
Response Time	≤20 ms	From coil energization to contact closure
Release Time	≤20 ms	From coil de-energization to contact opening
Degree of Protection	IP54–IP65	Depends on enclosureIEC 60529
Weight	30–80 g	Typical for relay module

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

Coil
Creates electromagnetic field when energized to move the armature

Material: Copper
Armature Part
Movable component that transfers motion to the contacts

Material: Steel
Contacts Part
Electrical switching elements that open or close the alarm circuit

Material: Silver alloy
Spring Part
Returns armature to default position when coil is de-energized

Material: Steel
Housing Part
Protects internal components and provides mounting points

Material: Plastic

Applied To / Applications

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

Safety Monitoring Subsystem

View system integration details

Manufacturers of Alarm Output Relay

Manufacturer profiles associated with Alarm Output Relay.

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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 · Page last updated 6 September 2026

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Frequently Asked Questions

What is the function of an alarm output relay?

It acts as an interface between a safety monitoring system and external alarm devices. When a hazardous condition is detected, the relay changes its contact state to activate alarms, indicators, or shutdown systems.

What are typical electrical ratings for this relay?

Typical reference ranges include contact rating of 10–30 A at 250 V AC, coil voltage of 12–24 V DC, and coil power consumption of 0.9–1.8 W. Always verify actual values for the specific model.

How does the relay respond to an alarm signal?

The relay receives a low-voltage control signal, energizing the coil and moving the armature. This changes the contact state within a response time of ≤20 ms, activating the external alarm circuit.

What environmental conditions can it withstand?

The operating temperature range is -40 to 70 °C, and the degree of protection is IP54–IP65 per IEC 60529. Confirm suitability for your specific environment with the manufacturer.

Data Basis

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

Preliminary Technical Classification

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current:	Up to 10A resistive load
voltage:	5-250V AC/DC
temperature:	-40°C to +85°C
switching speed:	≤10ms response time

Product Specifications

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