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Omron MY4N-GS-R is a 4-pole standard model of the MY-GS series miniature power relays. Upgraded from the classic MY series general-purpose relays, it comes standard with a mechanical action indicator, featuring high reliability and ease of use, and is widely applied in industrial automation control circuits.
- Model Meaning Explanation
| Model Part | Meaning |
| MY | Basic series of miniature power relays |
| 4 | 4 poles (4 sets of changeover contacts) |
| N | Standard type (no built-in surge suppression component) |
| GS | New-generation MY-GS series with a standard mechanical indicator |
| R | With LED action indicator light |
| DC24/AC220, etc. | Coil voltage specification (e.g., MY4N-GS-R DC24) |
- Core Specification Parameters
| Parameter Item | Specification Value | Description |
| Contact Configuration | 4PDT (4 sets of changeover contacts) | Each set includes 1 common terminal (COM), 1 normally open terminal (NO), and 1 normally closed terminal (NC) |
| Rated Current | 6A (resistive load) | AC-15: 250V 6A; DC-13: 30V 6A |
| Rated Voltage | Max. 250V AC/30V DC | Suitable for most industrial control circuits |
| Coil Voltage | Multiple options available | DC6/12/24/48/110/220V; AC12/24/48/100/110/220/240V |
| Coil Power Consumption | Approximately 1.2W for DC; Approximately 1.8VA for AC | Low-power consumption design to reduce heat generation |
| Mechanical Life | 50,000,000 operations | High durability, suitable for frequent cycling |
| Electrical Life | 500,000 operations (at rated load) | Reliable switching performance |
| Operation Time | Max. 15ms | Fast response, suitable for precision control |
| Release Time | Max. 10ms | Fast reset to reduce control delay |
| Insulation Resistance | ≥100MΩ (500V DC) | High insulation performance to ensure safety |
| Dielectric Withstand Voltage | 2,000V AC for 1 minute between coil and contacts | Compliant with international safety standards |
| Operating Temperature | -55℃~+70℃ | Adaptable to harsh industrial environments |
| Terminal Type | 14-pin plug-in type | Compatible with PYF series sockets (PYF-PU Push-In Plus sockets are recommended, which can reduce wiring time by 60%) |
III. Product Features and Advantages
- Standard Mechanical Action Indicator: The contact status can be visually checked without power supply, facilitating fault diagnosis.
- Dual-color LED Indicator Light: Orange for AC coils and green for DC coils, clearly indicating the coil power-on status.
- Coil Parameter Labeling: Specification parameters are printed on the coil tape for quick identification of model and voltage.
- Optional Latch Lever Design: Facilitates locking the contact status during circuit inspection to improve maintenance efficiency.
- Enhanced Vibration Resistance: Withstands vibration of 200m/s² (approximately 20G), suitable for industrial field environments.
- Comprehensive International Certifications: Certified by UL, CSA, VDE, CQC, etc., for global application.
- Wiring and Installation Guide
- Terminal Configuration (Bottom View)
| Terminal Number | Function | Terminal Number | Function |
| 1, 4, 7, 10 | Common Terminal (COM) | 2, 5, 8, 11 | Normally Closed Terminal (NC) |
| 3, 6, 9, 12 | Normally Open Terminal (NO) | 13, 14 | Coil (A1, A2) |
- Basic Wiring Steps
- Insert the relay into a PYF series socket (e.g., PYF14A-E) to ensure good contact.
- Connect the coil terminals (13/14) to the control power supply (note the polarity of DC coils).
- Connect the contact terminals to the load circuit:
Normally Open (NO) Contacts: Closed when the coil is energized.
Normally Closed (NC) Contacts: Closed when the coil is de-energized.
Common (COM) Terminals: Serve as the center for contact switching.
- Surge Suppression Recommendations
Since the MY4N-GS-R has no built-in surge suppression component, it is recommended to connect a surge suppressor in parallel across inductive loads:
– DC Loads: Connect a freewheeling diode in parallel (reverse connection).
– AC Loads: Connect an RC snubber circuit or a varistor in parallel.
- Application Scenarios
- Industrial Automation: Expansion of PLC output interfaces to control loads such as contactors and solenoid valves.
- Motor Control: Used as an intermediate relay to isolate the control circuit from the main circuit.
- Temperature Control: Cooperates with temperature controllers (e.g., Liuzhou Yatai CH102FE02-M) to drive heaters or cooling equipment.
- Signal Conversion: Converts weak signals into strong signals or realizes voltage/current level conversion.
- Safety Circuits: Constructs safety protection circuits such as interlocks and emergency stops.
- Model Selection and Alternatives
| Model | Difference | Application Scenario |
| MY4N-GS-R | Standard type without built-in surge suppression | General control circuits requiring external surge protection |
| MY4N-D2-GS-R | Built-in diode (for DC coils) | DC control circuits to suppress reverse surges |
| MY4N-CR-GS-R | Built-in RC snubber circuit (for AC coils) | AC control circuits to suppress voltage spikes |
| MY4IN-GS-R | Enhanced insulation type | Control occasions w |
VII. Precautions for Use
- The coil voltage must match the control power supply to avoid burnout due to overvoltage or failure to operate due to undervoltage.
- The contact load shall not exceed the rated value; inductive loads require additional surge protection.
- Avoid severe impact or vibration on the relay during installation.
- Regularly check the working status of the mechanical indicator and LED indicator light to ensure the normal operation of the relay.
- Distinguish between coil terminals and contact terminals during wiring to prevent short-circuit faults.
With the characteristics of 4 sets of changeover contacts, 6A rated load, wide temperature adaptability, and high reliability, Omron MY4N-GS-R miniature power relay is widely used in various industrial control and electrical circuits. The specific application scenarios are as follows:
- PLC Output Interface Expansion in Industrial Automation
This is the core application scenario. PLC output ports have low load capacity and cannot directly drive high-power or high-voltage loads such as contactors, solenoid valves, and indicator lights. Using MY4N-GS-R as an intermediate relay, the PLC’s weak signal (e.g., DC24V) can control the relay coil, and then the relay’s 4 sets of contacts can synchronously drive multiple external loads, realizing signal amplification and circuit isolation to avoid burnout of the PLC output module due to overload.
- Signal Transmission and Interlock in Motor Control Circuits
In motor start-stop, forward-reverse control circuits, MY4N-GS-R can act as an intermediate link to realize control signal transfer and safety interlock. For example, its normally closed contacts are connected in series in the reverse control circuit to prevent simultaneous triggering of motor forward and reverse commands; or multiple sets of contacts are used to synchronously control the motor’s running indicator light and fault alarm device.
- Actuator Driving in Temperature Control Systems
It can be used in conjunction with temperature controllers (e.g., Liuzhou Yatai CH102FE02-M): the solid-state output terminal (DC24V) of the temperature controller is connected to the coil of MY4N-GS-R, and the relay contacts are connected to high-power actuators such as heaters and cooling fans. This not only solves the problem of insufficient load capacity of the temperature controller output but also protects the core circuit of the temperature controller through electrical isolation.
- Signal Conversion and Voltage Level Matching
It is suitable for the connection scenarios of circuits with different voltage levels. For example, converting a low-voltage DC control signal (DC24V) into an AC high-voltage output (AC220V) to drive an AC contactor; or vice versa, using an AC control signal to control a DC load to realize cross-voltage level signal transmission.
- Safety Protection and Monitoring Circuits
In equipment emergency stop, overload, and short-circuit protection circuits, MY4N-GS-R can transmit fault signals. For example, when a thermal relay detects motor overload, its contacts trigger the relay coil, and the relay’s multiple sets of contacts can simultaneously cut off the motor main circuit, light up the fault indicator light, and send an alarm signal to the control room.
- Building Automation and Security Systems
Used for controlling building equipment such as lighting, air conditioners, and access control. For example, controlling the on-off of lighting circuits through relay contacts, or synchronously triggering multiple actions such as audible and visual alarms, access control locking devices, and surveillance video activation in security alarm systems.
- Signal Amplification of Instruments and Meters
For weak signals output by various sensors or detection instruments, MY4N-GS-R can convert them into strong electrical signals to drive recorders, alarms, and other equipment, ensuring stable signal transmission without interference.
