Features: Simplified design: This new DB9 adapter connects directly to the terminal pin, eliminating the need for additional wiring or board conversion, thereby eliminating the PCB board and reducing space. The new DB9 disconnect connector design is simpler, smaller and more compact with less resistance. Compact Size: New DB9 breakout terminal only 16mm thick, the smaller profile of this DB9 connector allows it to fit into applications with limited space better than older models. Robust Construction: A screw-connected copper alloy terminal provides a strong connection that can withstand upwards of 30 pounds of force for long-lasting reliability. Suitable for 30-18AWG cables. DB9 breakout board RS232 screw connectors, suitable for RS232/RS485/RS422 serial adapter COM port, such as computers and 3d printed, PLC, MODEM, printer, industrial instruments and other devices to communicate. Usage: Strip about 22mm of the PVC sheath and 4mm of the insulation layer off the cable core, insert the cable into the adapter wiring hole, and turn the bolt clockwise to make the cable core completely stuck between the copper block and the PIN pin, ensuring that the connector is fully fitted. NO WELDING REQUIRED No soldering iron tools are required for welding operations, Terminal wire range: 18-30AWG The wiring terminals are firm, stable, and reliable The copper material wiring terminal adopts a bolt and pin direct contact and tightening method, and the tension value with the cable can reach an astonishing 12KG Higher security performance White PBT material, non combustible when exposed to fire, with higher safety performance 1000V5A Copper material pins can accept 5A high current and 1000V voltage Beautiful wiring The white PBT shell has V-shaped grooves and isolated wiring, making the wiring beautiful and clean, Wide compatibility, no need for driver installation Supports 9-pin RS232/RS485/RS422 protocol communication Baud rate support: 300-115.2Kbps