relay control system

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Wall Mounted 7 Inch Touch Tablet With Serial Port GPIO Relay Control For Industrial Control With 2GB ROM, 8GB RAM and 8- core faster CPU processor for...

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Wall Mounted POE Android Relay Control 7'' Tablet With RS232 RS485 For Industrial Control RS232/RS485/GPIO/Relay: Product Description Main Feature And...

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Lot 6 channel relay module 6-channel relay control board with optocoupler specification: Customer Satisfaction: Please don't hesitate to contact us if...