The 1-Way 24V Electromagnetic Relay Module is a compact, high-reliability switching board designed for industrial control systems, PLCs, and automation equipment that operate on 24V DC logic. It features optocoupler isolation between the control signal and the relay coil, ensuring that your sensitive 24V control circuits are protected from voltage spikes and electrical noise generated by the relay and connected loads. The module uses a low-level trigger design, meaning the relay activates when the input signal is pulled LOW (0V).
At the heart of the module is a high-quality electromagnetic relay capable of switching AC or DC loads up to 10A at 250V AC or 10A at 30V DC. This makes it suitable for controlling lamps, motors, solenoids, heaters, valves, and other industrial devices directly from a 24V logic signal. The relay provides Normally Open (NO) , Normally Closed (NC) , and Common (COM) contacts for flexible wiring configurations.
The optocoupler isolation is a critical safety feature for industrial applications. It creates a galvanic barrier between the control side (your PLC or 24V control system) and the load side (the relay and connected equipment). This protects your control electronics from back-EMF, voltage transients, and ground loops that can occur when switching inductive loads such as motors, solenoids, and contactors.
The 24V coil voltage makes this module specifically suited for industrial control systems where 24V DC is the standard control voltage. This includes PLC systems, industrial automation equipment, building management systems, and process control installations. The 24V version provides reliable operation with lower current draw than 5V or 12V versions, reducing power supply requirements in large control panels.
The module features screw terminals for secure connection of the load wiring, and pin headers for easy connection to your PLC or control system. LED indicators provide visual feedback: a power LED and a relay status LED that lights up when the relay is activated. The compact PCB design with mounting holes makes it easy to integrate into control panels, DIN rails, and equipment enclosures.
The module is widely used in PLC control systems, industrial automation, building management, process control, CNC machines, robotic systems, and any application where a 24V logic signal needs to control a higher-power load. It is also popular in educational projects for teaching industrial relay control and optocoupler isolation principles.
Important Note: The relay is rated for 10A at 250V AC or 30V DC. For inductive loads such as motors and solenoids, it is recommended to keep the load current below 60–70% of the rated value for reliable operation. Always ensure proper isolation and safety precautions when working with mains voltage or industrial equipment.
Whether you are building a PLC control panel, automating an industrial process, or adding relay control to a 24V system, the 1-Way 24V Electromagnetic Relay Module provides a reliable, isolated solution. It is suitable for individual engineers, system integrators, and businesses purchasing in bulk for industrial deployments.
Features
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1-way relay output — Single-channel switching for AC or DC loads
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24V DC coil — Compatible with industrial PLC and automation systems
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Optocoupler isolation — Protects control circuits from load-side noise and voltage spikes
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Low level trigger — Relay activates when input is pulled LOW
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High-current relay — 10A at 250V AC / 30V DC switching capacity
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LED indicators — Power LED and relay status LED for visual feedback
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Screw terminals — Secure connection for load wiring
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Pin headers — Easy connection to PLC or control system
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Compact PCB design — With mounting holes for easy installation
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Wide application range — PLC control, industrial automation, building management, process control
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Channels | 1 (single-way) |
| 2 | Relay Rating | 10A at 250V AC / 10A at 30V DC |
| 3 | Coil Voltage | 24V DC |
| 4 | Trigger Type | Low level trigger |
| 5 | Isolation | Optocoupler isolation |
| 6 | Contacts | NO / NC / COM |
| 7 | Indication | Power LED + relay status LED |
| 8 | Terminal Type | Screw terminals + pin headers |
