4-Port Serial Card W-99100-4S

W-99100-4S Overview

The W-99100-4S is a PCI Express x1 four-port serial expansion card designed for system integrators, equipment manufacturers, industrial PC builders, maintenance teams, and professional users who need to add multiple serial communication channels to a host computer. Built around the AX99100 controller, the card combines a compact PCIe interface with four serial ports in one expansion solution, helping users connect legacy or industrial serial equipment without relying on multiple separate adapters.

For projects involving industrial computers, automation controllers, test equipment, POS terminals, embedded systems, or other serial-based devices, the W-99100-4S offers a practical way to increase I/O density while retaining a standard PCI Express x1 host connection. The AX99100 controller architecture supports multi-UART operation, flexible serial formats, flow control, FIFO buffering, custom baud-rate generation, power-management functions, and DMA burst transfer.

Key Features of the W-99100-4S

Feature	Customer Value / Specification
4 Serial Ports	Provides four serial channels for multi-device communication and I/O expansion.
PCI Express x1 Interface	Supports straightforward integration into compatible PCI Express host systems.
AX99100 Chipset	Designed for PCIe-to-multi-I/O applications with multi-UART communication capability.
Serial Protocol Support	Supports RS-232, RS-422, and RS-485 multiprotocol serial communication.
Serial Data Format	Supports 5, 6, 7, 8, and 9-bit serial data formats.
Parity Options	Supports even, odd, none, space, and mark parity options.
Flow Control	Supports hardware and software flow control for flexible serial communication.
FIFO Buffer	256-byte transmit and receive FIFO for each serial port.
Custom Baud Rate	Supports custom baud-rate generation through internal PLL or external clock.
Controller Speed	Controller capability up to 25 Mbps per serial port, depending on configuration and operating conditions.
Power & DMA Functions	Supports remote wakeup, power management, transceiver shutdown, and DMA burst transfer.
IrDA & Multi-Drop	Supports Slow IrDA mode up to 115200 bps and 9-bit multi-drop communication.

W-99100-4S Technical Specifications

Item	Specification
Model Number	W-99100-4S
Chipset	AX99100
Port Quantity	4 × Serial
Host Interface	PCI Express x1 Slot
Dimensions	72 × 120.3 × 18.5 mm
Operating Temperature	0°C to 50°C
Operating Humidity	10% to 90% RH, non-condensing
Storage Temperature	0°C to 80°C
Storage Humidity	5% to 90% RH, non-condensing

The model number, four-port configuration, PCI Express x1 interface, dimensions, and listed Windows compatibility correspond with the published W-99100-4S product information.

Operating System Compatibility

The W-99100-4S supports a broad range of legacy and established operating environments, making it suitable for replacement, retrofit, and long-life industrial systems. Supported platforms include Windows 10 32/64-bit, Windows 8 and 8.1 32/64-bit, Windows 7 32/64-bit, Windows Vista 32/64-bit, Windows XP 32/64-bit, Windows 2000, Windows Server 2012, Windows Server 2008 R2, and Windows Server 2003 32/64-bit.

The supplied product specification also lists Mac OS 10.x on Intel-based systems, tested up to Mac OS 10.9, and Linux 2.4.x or later, tested up to Linux 3.5.

For B2B integration projects, buyers should confirm the required driver version, operating-system build, motherboard compatibility, serial electrical mode, and connected peripheral requirements before volume deployment.

Why Choose the W-99100-4S 4-Port Serial Card?

A four-port PCIe serial card can reduce expansion complexity when several serial devices must operate from one host computer. Instead of installing multiple single-port adapters, the W-99100-4S PCI Express serial card centralizes four serial channels on one PCI Express x1 card. This is especially useful in applications that depend on serial-connected instruments, controllers, terminals, scanners, industrial devices, or legacy equipment.

The AX99100 platform also provides flexible serial communication controls. Support for multiple data-bit formats, parity modes, hardware and software flow control, deep FIFO buffering, and programmable baud rates helps engineers adapt the card to different communication requirements. For system builders, these capabilities can simplify integration across mixed equipment environments.

Typical Applications

Recommended application scenarios include:

• Industrial PC and embedded computer expansion

• Factory automation and machine-control systems

• Measurement and test instrumentation

• POS and commercial terminal systems

• Serial device servers and communication gateways

• Legacy equipment connection and retrofit projects

• Data acquisition and control applications

• OEM system integration requiring multiple serial ports

PCIe serial cards based on this controller architecture are specifically positioned for industrial computers, automation systems, measurement equipment, medical devices, POS terminals, and embedded applications.

Information to Include in Your RFQ

For faster quotation and compatibility review, send your required quantity, target application, host operating system, required serial mode, expected baud rate, destination market, and any packaging or OEM requirements. For volume projects, also provide your forecast quantity and required delivery schedule so the supplier can evaluate the most suitable commercial proposal.

The W-99100-4S PCI Express x1 4-port serial expansion card is a focused solution for B2B buyers who need four serial ports, broad legacy-system compatibility, compact dimensions, and an AX99100-based architecture for professional I/O expansion.