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This DB9 Male solderless breakout adapter converts standard D-SUB 9-pin RS232 serial interface into easy-access spring terminal ports. Featuring a tool-free push-in spring terminal design, it allows quick wiring, testing and circuit adjustment without soldering. Accurate pin mapping guarantees stable serial signal communication. The compact module size is perfect for installation in narrow spaces and control cabinets. Ideal for industrial debugging, serial port wiring modification, equipment maintenance and custom RS232 serial communication projects.