Omron MY4IN1 24VDC (S) Miniature Power Relay

The Omron MY4IN1 24VDC (S) miniature power relay is a 24 VDC plug-in relay designed for industrial control panels, machine automation, and auxiliary switching circuits. It belongs to the MY relay family and provides 4PDT switching in a compact socket-mounted body.

Technical Overview

This relay uses a 24 VDC coil and a four-pole changeover contact structure. Comparable MY4IN DC24 (S) data lists 24 VDC coil operation, 37.7 mA coil current, approximately 636 ohms coil resistance, LED operation indication, plug-in terminals, and compatible PY-series socket mounting. The MY4IN1 designation is associated with a specific coil polarity arrangement, so wiring should always be checked against the relay marking and circuit diagram.

Why It Is Used in Control Panels

Control engineers choose this relay when several independent circuits must be switched at once from a single 24 VDC signal. It can be used for PLC output isolation, signal multiplication, alarm routing, interlock circuits, status feedback, and auxiliary control logic. The operation indicator makes troubleshooting easier, especially in dense cabinets.

Installation and Safety Notes

Before installation, confirm coil polarity, socket type, load current, contact voltage, and duty cycle. The relay should be installed in a suitable enclosure with correct wiring practices. Inductive loads should be managed with suppression components to limit arcing and extend relay life.

Application Fit

The Omron MY4IN1 24VDC (S) miniature power relay is a strong fit for 24 VDC automation systems where serviceability and clear operating feedback are priorities. For additional brand context, visit Omron relay information.

FAQ

What is Omron MY4IN1 24VDC (S)?

It is a 24 VDC, 4PDT, plug-in miniature power relay for industrial control and automation circuits.

How is MY4IN1 different from MY4IN?

The MY4IN1 variant is commonly associated with a specific coil polarity arrangement. Engineers should verify terminal polarity before replacement.

Does it have an LED indicator?

Yes. The relay includes an operation indicator, which helps identify whether the coil is energized.

Can it be used with PLC outputs?

Yes, if the PLC output rating is compatible with the relay coil current and voltage. A relay interface or driver may be required depending on the output type.

What should be checked before replacement?

Check coil voltage, contact form, socket compatibility, terminal polarity, load type, and whether the original circuit uses suppression components.