30A 4 Channel Relay Module 12V Expansion Board With High Low Level Trigger Optocoupler Isolation For PLC Automation Equipment Control Industrial Applications
✔️ 30A per channel, 12V DC supply, optocoupler isolation
This 4-channel relay expansion board lets you safely switch high-power devices from a low-voltage control system. It's a common fit for PLC automation equipment, industrial control setups, and IoT projects where isolated switching is needed.
✅ Maximum load per channel up to 30A for high-power switching
✅ Load voltage range up to 30V DC / 250V AC
✅ DC 12V supply and ~5mA trigger current for easy interfacing
✅ Optocoupler isolation with LED indicators for status
✅ Terminal blocks for quick wiring and easy setup
💡 What is a 12V four-channel relay module used for in PLC automation and industrial control? This handy device helps you switch high-power loads from low-voltage controllers. - Handily switches motors, pumps, solenoids, and indicators from a microcontroller or PLC. - Provides isolated control through optocouplers to protect sensitive controllers. - Supports up to 30A per channel for reliable industrial control. - Easy wiring via terminal blocks with configurable high/low trigger for quick setup.