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Main image of M.2 (B+M Key) to 4-Port RS232 Serial Card + 1 Parallel Port Expansion Card, WCH384 Chip Industrial Controller Adapter PCIe M.2 to DB9 RS232 and DB25 Parallel Interface

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M.2 (B+M Key) to 4-Port RS232 Serial Card + 1 Parallel Port Expansion Card, WCH384 Chip Industrial Controller Adapter PCIe M.2 to DB9 RS232 and DB25 Parallel Interface

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M.2 (B+M Key) Expansion to RS232 & Parallel Ports Converts an M.2 (B+M Key) slot into 4 RS232 serial ports and 1 parallel port (DB25), allowing flexible connectivity for industrial equipment, CNC machines, and legacy printers.; High-Performance WCH384 Chipset Equipped with the WCH384 controller, ensuring stable communication, accurate signal transmission, and strong compatibility with Windows and Linux operating systems.; Wide Serial Configuration Support Supports data bits 5, 6, 7, 8, stop bits 1 or 2, and parity modes Even, Odd, Mark, Space, Noneideal for precise serial device communication and custom system integration.; Durable Industrial-Grade Design Designed for continuous operation with a temperature range of -40°C to 85°C, ensuring stable performance in harsh environments; compact PCB (main board 22×80mm / 0.87×3.15in, sub board 45×67mm / 1.77×2.64in).; Plug & Play, Broad Compatibility Compatible with Windows 7/8/10/11, Linux, and embedded systems. Perfect for applications such as POS terminals, industrial automation, serial monitoring, and parallel printer control.

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AoQhir M. 2 (B+M Key) to 4-Port RS232 Serial Card + 1 Parallel Port Expansion Card, WCH384 Chip Industrial Controller Adapter PCIe M. 2 to DB9 RS232 and DB25 Parallel Interface Compatible with Windows & Linux Product Description Expand your systems connectivity with the M. 2 (B+M Key) to 4-Port RS232 + 1 Parallel Port Expansion Card, designed for industrial and embedded use. Featuring the WCH384 chipset, this adapter ensures high-speed, stable, and reliable serial communication, making it ideal for a wide range of applications such as industrial automation, CNC control, data logging, and legacy printer connections.

This M. 2 card offers 4 RS232 (DB9) serial ports and 1 parallel (DB25) interface, with full configuration options for data bits, stop bits, and parity modes. Built with an industrial-grade PCB that withstands extreme temperatures from -40°C to 85°C, it guarantees long-term durability and consistent signal performance. The compact design (main board 22×80mm / 0.87 × 3.15 in, sub board 45×67mm / 1.77 × 2.64 in ) fits easily into embedded PCs, industrial controllers, or automation systems. Compatible with Windows, Linux, and various industrial software environments, its a perfect choice for professionals seeking reliable serial and parallel expansion in modern M.

2 platforms.
Product Detail Product Name: M. 2 (B+M Key) to 4-Port RS232 Serial Card +
Parallel Port Card Model: IO-M2F384-4S1P
Chip: WCH384
Output Interfaces: 4x RS232 Serial Ports + 1x Parallel Port
Motherboard Slot: M. 2 (B+M
Key) Data Bits: 5, 6, 7, 8
Stop Bits: 1, 2
Parity Bit: Even, Odd, Mark, Space, None
Operating Temperature: -40 to 85°C
Storage Temperature: -55 to 125°C
Dimensions: Main board 22x80mm, Sub-board 45x67mm
Weight: Net 365g, Gross 488g

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First Listed on Newegg	July 09, 2026

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