Omron LY2N 100/110VAC General Purpose Relay Technical Guide

The Omron LY2N 100/110VAC general purpose relay is a dependable plug-in electromechanical relay designed for control panels, automation systems, and industrial switching circuits. It is part of Omron’s LY relay family, a long-established relay series used in machinery, electrical cabinets, process equipment, and interface circuits where stable switching performance is required.

This model uses a 100/110 VAC coil and provides a DPDT contact form, also known as 2 Form C. That means the relay has two independent changeover contacts, allowing it to switch two circuits at the same time. This structure is useful when one relay must control separate signal paths, provide interlocking, or switch both control and indication circuits in one compact device.

Technical Features of the Omron LY2N 100/110VAC General Purpose Relay

The relay is built with plug-in terminals, making it suitable for socket-based installation. This is especially valuable in industrial panels because a relay can be replaced without rewiring the entire circuit. The Omron LY2N 100/110VAC general purpose relay includes an LED operating indicator, which allows technicians to confirm coil energization visually during operation, commissioning, or troubleshooting.

According to Omron’s product data, the relay uses Ag alloy contacts and supports a rated load of 10 A for resistive loads at 110 VAC. It is also specified for inductive loads, including 7.5 A at 110 VAC with a power factor of 0.4 and 5 A at 24 VDC with an L/R value of 7 ms. These figures make the relay suitable for many control applications, provided the final load conditions are checked carefully.

Coil and Electrical Performance

The coil ratings for this model include 100 VAC and 110 VAC operation across 50 Hz and 60 Hz supply conditions. This makes it suitable for equipment designed around common AC control voltages. The relay’s operate voltage is specified as 80% maximum, which helps define the voltage level required to reliably energize the coil.

Because the Omron LY2N 100/110VAC general purpose relay is an AC coil model, it is commonly used in systems where the control transformer or panel supply provides AC voltage rather than DC control power. This can be found in older industrial panels, HVAC controls, motor control centers, and machine systems designed around AC control circuits.

Common Applications

This relay is often used in machine automation, pump controls, conveyor systems, control panels, lighting control interfaces, signal transfer circuits, and alarm outputs. Its DPDT structure gives designers flexibility when two related switching actions must happen together. For example, one contact may switch a load while the other provides a status signal to a controller or indicator lamp.

The LED indicator is particularly useful in maintenance environments. When a control signal is present, the visible indication makes it easier to separate coil-side issues from contact-side or load-side faults. This saves time during fault diagnosis and supports more efficient panel servicing.

Installation and Selection Notes

Before using the Omron LY2N 100/110VAC general purpose relay, engineers should confirm coil voltage, socket compatibility, load type, switching frequency, ambient temperature, and required approvals. Inductive loads such as solenoids, contactor coils, and motors can produce electrical stress during switching, so protective components may be needed depending on the circuit design.

For related Omron relay options and compatible components, visit Omron industrial relay components.

FAQ

What is the Omron LY2N 100/110VAC general purpose relay used for?

It is used to switch electrical control circuits in industrial panels, automation equipment, machinery, and signal interface systems. It is especially practical when a 100/110 VAC control voltage is available.

What does DPDT mean in this relay?

DPDT means double pole double throw. The relay has two separate changeover contacts, allowing two circuits to be switched at the same time.

Does this relay have an LED indicator?

Yes. The Omron LY2N 100/110VAC general purpose relay includes an LED operating indicator, helping technicians see when the coil is energized.

Is this relay suitable for socket mounting?

Yes. It uses plug-in terminals and is designed for socket mounting, which makes replacement and maintenance easier in control panels.

What contact material is used?

This model uses Ag alloy contacts, which are commonly used in industrial relays for reliable switching performance.

Can it switch inductive loads?

Yes, but the inductive load rating is lower than the resistive load rating. Always compare the actual load with the official relay specifications.

Why choose an AC coil relay instead of a DC coil relay?

An AC coil relay is suitable when the control circuit uses AC power. Many legacy and industrial control systems use 100/110 VAC control voltage.