Omron LY2I4N 220/240VAC General Purpose Relay Technical Guide

The Omron LY2I4N 220/240VAC general purpose relay is a plug-in electromechanical relay for industrial control panels that use 220 to 240 VAC coil voltage. It offers DPDT switching, a 10 A rated carry current, an LED operation indicator, and a test button. This makes it suitable for applications where visibility, serviceability, and reliable AC control operation matter.

Technical Overview

The relay belongs to the Omron LY series, a family widely used in machine automation, control cabinets, and general-purpose switching circuits. The LY2I4N 220/240VAC model uses an 8-pin plug-in format and a DPDT contact arrangement. This allows one coil signal to change the state of two separate contact sets. It is particularly useful when a control system needs to switch two related functions at the same time.

The 220/240 VAC coil makes the relay suitable for AC control systems where mains-level control voltage is standard. Omron data for similar LY 220/240 VAC models lists low AC coil current values and silver alloy contacts. The relay is non-latching, so it returns to its rest position when coil voltage is removed.

Operational Benefits

The LED indicator provides quick visual confirmation that the coil is energized. In dense control panels, this can significantly reduce diagnostic time. The test button adds another practical advantage by allowing manual verification of relay operation during commissioning or fault finding. These features are especially valuable in systems where service teams must identify circuit status quickly and accurately.

Common Applications

This relay is often used in industrial machinery, auxiliary control circuits, HVAC panels, pump control systems, lighting control, alarms, and general automation panels. Its 10 A contact rating supports many standard switching duties, provided the actual load remains within the relay’s rated envelope. Designers should always consider inrush current, inductive load behavior, duty cycle, and cabinet temperature.

Selection Guidance

The Omron LY2I4N 220/240VAC relay should be selected when the panel control voltage is 220 to 240 VAC and when an indicator and test button are desired. If the control system uses 24 VAC, 24 VDC, or 110/120 VAC, another coil version should be selected. Correct socket matching is also essential for safe installation and consistent maintenance.

Omron LY2I4N 220/240VAC For more information about Omron, compare LY series relays and compatible industrial control products.

Omron LY2I4N 220/240VAC FAQ

What is the Omron LY2I4N 220/240VAC general purpose relay?

It is an 8-pin plug-in DPDT relay with a 220/240 VAC coil, LED indicator, test button, and 10 A switching capability.

Why is the LED indicator useful?

The LED helps technicians quickly see whether the relay coil is energized, reducing diagnostic time during maintenance.

Can it be used in machine control panels?

Yes. It is well suited for industrial machine panels, auxiliary switching circuits, and general control cabinet applications.

Does it remain switched after power is removed?

No. It is a non-latching relay, so the contacts return to their normal state when coil power is removed.

What should be checked before installation?

Check coil voltage, socket type, contact rating, connected load type, wiring diagram, ambient temperature, and panel safety requirements.