High-Performance PCI 4 Port Serial/RS232 Card (4S) W-954-4S2

Reliable Multi-Port Serial Expansion for PCI Systems

PCI 4 Port Serial/RS232 Card (4S) W-954-4S2 is designed for computers, industrial workstations, and embedded control systems that need to communicate with several serial devices through one PCI expansion slot. It provides a practical method of adding multiple RS232 communication channels for equipment control, data collection, peripheral integration, testing, and legacy-system maintenance.

Built around a multi-function PCI controller, the card complies with PCI Bus Specification 2.2 and Power Management Specification 1.0. Its UART architecture is software compatible with 16C450, 16C550, 16C650, 16C750, and 16C950 devices, helping system integrators work with established serial communication environments.

Key Features of PCI 4 Port Serial/RS232 Card

Technical Specifications

Deep FIFO Buffering for Stable Multi-Device Communication

Each transmitter and receiver includes a 128-byte-deep FIFO. The expanded buffering capacity helps reduce the frequency of processor servicing and supports more stable data communication when several serial channels operate simultaneously.

Readable FIFO levels and configurable interrupt thresholds also help system developers monitor communication conditions. These functions are particularly useful in industrial applications where several peripheral devices continuously transmit operational, diagnostic, or measurement data.

Flexible Hardware and Software Flow Control

W-954-4S2 supports both in-band and out-of-band flow control. Programmable Xon/Xoff software control manages data flow within the transmitted data stream, while CTS/RTS and DSR/DTR signals provide hardware handshaking between connected devices.

Readable flow-control status helps developers identify communication conditions and adjust system settings. This combination improves compatibility with different serial devices and reduces the risk of data loss when connected equipment operates at different processing speeds.

Connector and Port Configuration Options

The required connector arrangement should be confirmed before purchase because the product information lists several possible output configurations. One available arrangement uses a DB37 female connection transferred to four DB9 male serial connectors.

Alternative configurations may combine DB9 male serial connectors with an optional parallel interface. For a four-port RS232 project, buyers should specify the required bracket, breakout cable, connector gender, number of DB9 interfaces, and whether a parallel-port function is needed.

Confirming these details before production helps prevent installation problems and ensures that the delivered PCI serial card matches the target computer and connected equipment.

System Integration and Local Bus Functions

The controller provides an 8-bit or 32-bit pass-through Local Bus that can operate asynchronously to the PCI clock. It supports I/O-base or memory-base configuration, up to four chip-select signals, and mapped I/O or memory address spaces.

Twelve multi-purpose I/O pins can also be configured as interrupt inputs. These functions make the card suitable not only for ordinary peripheral expansion but also for embedded integration, equipment development, and customized control systems requiring additional interface flexibility.

Typical Applications

• Industrial automation and machine control systems

• Point-of-sale terminals and retail equipment

• Laboratory instruments and testing equipment

• Access control, attendance, and security devices

• Serial terminals, modems, and data acquisition equipment

• CNC machines, measurement tools, and diagnostic systems

• Maintenance of computers connected to legacy RS232 devices

• Multi-device communication in embedded or specialized workstations

B2B Purchasing and Configuration Information

To receive an accurate quotation, buyers should provide the required order quantity, target application, PCI host-system information, connector configuration, operating-system requirements, packaging needs, and expected delivery schedule.

Driver availability, sample orders, customized connector arrangements, minimum order quantity, packaging method, and production lead time should be confirmed according to the specific project. Providing detailed technical information allows the supplier to verify compatibility before shipment.

Why Choose PCI 4 Port Serial/RS232 Card W-954-4S2?

PCI 4 Port Serial/RS232 Card (4S) W-954-4S2 offers a flexible expansion solution for systems that need multiple serial channels, configurable flow control, deep FIFO buffering, and integration-friendly PCI functionality.

Its support for several established UART architectures helps simplify integration with existing software environments, while the configurable connector options allow buyers to select a suitable hardware arrangement for their equipment.

Send your host-system details, connector requirements, operating environment, and purchasing quantity for configuration verification and a project-specific quotation.