I/O Relay Modules

I/O Relay Modules (I/O Relay Modules) are core components of automation control systems, providing electrical isolation and signal conversion. Their core function is to switch high-power load circuits via low-power control circuits. Typical applications include industrial equipment control, security systems, and home automation.

 

1. What are the Key Features of I/O Relay Modules?

1) Electrical Isolation

Relay contacts separate the control circuit from the load circuit, protecting sensitive components from high voltage and current surges.

 

Insulation resistance is typically required to be at least tens of megohms to ensure circuit safety.

 

2) Module Types

Electromagnetic Relay Modules: Based on the principle of electromagnetic induction, they are suitable for general industrial applications, with an activation/release time of approximately a few milliseconds to tens of milliseconds.

 

Solid-State Relay Modules (SSRs): Lack mechanical contacts, offering faster response times (as low as a few milliseconds), longer lifespan, and are suitable for high-frequency switching scenarios.

 

3) Performance Parameters

Load Capacity: For example, a 5V relay module can support a 250V/10A load, with a drive current as low as 5mA.

 

Operating Environment: Industrial-grade modules typically support a temperature range of -20°C to 70°C.

 

2. What are the Typical Applications of I/O Relay Modules?

Industrial Automation: Multiple modules are combined to implement complex logic control, such as motor start/stop and equipment interlocking.

 

Fault Protection: Power outages or alarms are triggered when a system anomaly occurs, ensuring operational safety.

 

Module selection requires a comprehensive evaluation based on load voltage/current, response speed, and environmental adaptability. For example, plug-in modules are suitable for manual maintenance, while surface-mount modules facilitate automated production.