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Solder-free DB9 RS232 breakout board adopts D-SUB 9Pin design with white rubber core for safe insulation and stable signal transmission. One set includes male and female DB9 connectors, supporting fast wiring via screw terminals without soldering. Standard pin definition fits PLC, serial printers, industrial controllers and all RS232 peripheral devices. Comes with matched screwdriver for convenient assembly, compact structure easy to mount and wire. Perfect for serial port debugging, industrial control wiring, electronic projects and equipment maintenance.