PCIe to 4-Port RS232 Serial Expansion Card with SATA Power Supply, DB9 Serial Adapter with Independent Power Output for Industrial PLC Debugging & Equipment Control

This PCIe 4-port RS232 serial expansion card is designed for industrial control, equipment debugging and multi-serial-device connection scenarios. It expands four independent standard DB9 male RS232 interfaces through the PCIe slot of the motherboard, allowing users to connect multiple PLCs, serial sensors, testing instruments and console devices at the same time without serial port shortage.

Equipped with a SATA power interface, the card can receive stable external power supply to avoid insufficient power from the motherboard PCIe slot when running multiple serial devices at full load. It also reserves power output pins to supply power to external serial peripherals that require auxiliary power, simplifying wiring layout for integrated industrial equipment.

The PCB board is added with multi-layer shielding and filtering components to effectively isolate electromagnetic interference generated by motors, inverters and other industrial equipment, preventing data packet loss and communication disconnection during long-term continuous operation. It supports a full range of standard baud rates to cover all conventional serial communication protocols.

Compatible with PCIe X1/X4/X8/X16 slots and equipped with a standard metal mounting bracket for easy installation inside standard and compact industrial chassis. Official dedicated drivers cover all mainstream Windows versions and common Linux distributions used in industrial automation, realizing quick recognition after installation without complex debugging.

It is widely used in factory automation, server equipment debugging, security monitoring systems and laboratory testing workstations, serving as a reliable multi-channel serial expansion solution for industrial hosts.