Nanjing Qinheng Microelectronics WCH CH382L Controller . Interface Port: 1 x Parallel DB25 Female connection.

128-byte hardware FIFO depth for deep buffering, mitigating data overrun packet drops.

For general retail versions, search for "Sunix Golden series" or "Exone PI40952" drivers on the manufacturer's legacy support pages.

A common mistake is utilizing universal driver utility tools that push generic packages, which can introduce registry corruption or device latency. Instead, you should always source your driver packages directly from the chip developers or official OEM infrastructure: Delock PCI Express Card to 2 x Serial

The "PI40952-3X2B" designation is typically silk-screened directly onto the printed circuit board (PCB) of various third-party expansion cards, most notably manufactured by brands like (such as the Delock 89219 or 89129 models). The core components driving this hardware include:

[Unknown Device / PCI Port] ──> [Extract Driver ZIP] ──> [Point Device Manager to .INF File] ──> [Port Initialization] Step 1: Stage the File System

card, often manufactured or distributed under brands like or Sunix . This card is typically used to add legacy RS-232 serial ports to modern desktop computers for connecting specialized hardware like industrial machinery, lab equipment, or older point-of-sale systems. The "Detailed Story" of Setting It Up

A known technical report for this specific card indicates that it can sometimes be locked in "Native" mode (mapped to memory space) instead of "Legacy" mode (mapped to I/O space). Native Mode:

To update the drivers for this specific hardware, follow these steps:

The likely refers to a chipset or model identifier for a multi-I/O controller card. These cards typically use the Universal Print Driver (UPD) or specific chipset drivers (often from manufacturers like Oxford , Asix , or MosChip ) to enable legacy communication ports on modern systems. Installation & Update Guide Identify the Hardware in Device Manager Press Windows Key + R , type devmgmt.msc , and press Enter.

When your system shows a yellow warning triangle next to an unidentified "PCI Serial Port" or "PCI Simple Communications Controller" inside the Device Manager, use this precise manual update procedure: Delock PCI Express Card to 2 x Serial RS-232 + 1 x Parallel

Up to 2 x External RS-232 Serial DB9 Male connections.

The "3x2B" revision marker indicates a specific milestone in the driver development lifecycle. Transitioning to this version is recommended for the following reasons:

Go to and select "The printer that I want isn't listed" to manually assign the UPD to the correct LPT port . Manual Driver Installation (Code 28 Fix)

Assuming you have obtained the legitimate update package (e.g., PI40952+3x2b+driver+upd_v3.0.exe ), follow this sequence: