Omron MY4IN-GS 24VDC Plug-In Power Relay: Technical Guide for Industrial Control Panels

The Omron MY4IN-GS 24VDC plug-in power relay is a compact electromechanical relay used in automation systems, control panels, machine interfaces, and auxiliary switching circuits. It is part of the Omron MY-GS family, a relay range designed for clear operation visibility, socket-based installation, and dependable switching in industrial environments.

This model uses a 24 VDC coil and a 4PDT contact arrangement. It is suitable for control systems where a 24 VDC supply is already used for PLCs, sensors, interface modules, pilot devices, and industrial control equipment. In modern automation panels, 24 VDC is one of the most common control voltages, making this relay a practical choice for many installations.

Main Technical Characteristics

The Omron MY4IN-GS 24VDC plug-in power relay is designed with a 14-pin plug-in terminal structure and four-pole changeover contacts. It includes LED indication, mechanical indication, and a lockable push test button. The contact structure is 4PDT, meaning four independent changeover circuits can be operated from one coil.

Omron data for the MY4IN DC24 family identifies a 24 VDC coil, LED operating indicator, 4PDT contact form, plug-in terminal structure, and 636 ohm coil resistance for the listed 24 VDC model. The relay is intended for control panel use and is part of Omron’s miniature power relay category.

Why 24 VDC Relays Are Widely Used

Many industrial automation systems are built around 24 VDC control voltage because it is practical, safe for control circuits, and compatible with PLC outputs, sensors, and interface devices. A 24 VDC relay can act as a bridge between a low-power control signal and several switched output circuits.

The Omron MY4IN-GS 24VDC plug-in power relay is useful when a PLC output or control module needs to operate multiple auxiliary contacts. Instead of using several separate relays, one 4PDT relay can manage multiple linked switching functions, helping reduce panel complexity.

Inspection, Testing, and Service Advantages

The built-in LED indicator allows quick confirmation that the coil is energized. The mechanical indicator gives a physical visual reference of relay movement. These two features are important in real-world panel work because they help technicians understand circuit status without extensive testing.

The lockable push test button is especially useful during startup and fault diagnosis. It allows controlled manual activation of the relay contacts. This helps verify wiring, confirm connected device behavior, and isolate issues between the control signal, the relay, and the load circuit.

Typical Uses

The Omron MY4IN-GS 24VDC plug-in power relay is commonly used in PLC interface panels, machine control cabinets, production equipment, signal switching, alarm circuits, monitoring systems, relay logic panels, and auxiliary control circuits. Its plug-in format also supports faster servicing because the relay can be replaced without disturbing socket wiring.

For related relay sockets, Omron automation components, and compatible control panel parts, visit more Omron information.

Frequently Asked Questions

What is the Omron MY4IN-GS 24VDC plug-in power relay used for?

It is used to switch multiple auxiliary circuits in industrial automation, control panels, PLC interface systems, machine controls, and signal circuits using a 24 VDC coil input.

Why is 24 VDC common in control panels?

24 VDC is widely used because it is compatible with PLCs, sensors, control modules, and industrial interface devices. It provides a practical control voltage for automation environments.

What does 4PDT provide in this relay?

4PDT provides four independent changeover contacts. This allows one relay coil to switch four circuits, which is useful for interlocks, status signals, auxiliary loads, and control logic.

Does the relay have a visual operating indicator?

Yes. It includes LED indication and a mechanical indicator, helping users quickly check whether the relay is energized and physically operating.

What is the advantage of a plug-in relay?

A plug-in relay can be installed in a compatible socket, making wiring cleaner and replacement faster. This is especially useful in control cabinets where downtime must be minimized.

Can this relay be used with PLC outputs?

Yes, when the coil voltage and output rating are suitable. It is commonly used as an interface relay between PLC control signals and multiple switched circuits.

Is the test button useful for troubleshooting?

Yes. The lockable test button allows manual relay operation during controlled checks. This helps technicians confirm contact behavior and connected load response during maintenance.