1 Pair DB9 Male & Female RS232 Breakout Board Type B, 9Pin D-SUB Solderless Terminal Signal Module with Protective Housing & Lock Nuts

This Type B combo set contains one DB9 male breakout adapter and one DB9 female breakout adapter, which convert standard 9-pin D-SUB RS232 serial signals to independent screw terminals for signal splitting, circuit modification and equipment fault detection.

No soldering is required for wiring; you only need a screwdriver to fix, adjust or remove wires flexibly. The matched full plastic housing fully covers metal terminals to isolate dust and physical contact, effectively avoiding short-circuit faults in factory and lab environments.

Supporting lock nut installation, the breakout modules can be tightly secured on rack panels and equipment shells without loosening under vibration. Corresponding pin labels on every terminal greatly speed up wiring and troubleshooting procedures.

It supports standard RS232 serial communication and works well with industrial PLC controllers, frequency converters, barcode scanners, access control systems and serial testing meters. An essential wiring auxiliary module for automation maintenance and electronic engineering testing.