- **Four Independent Serial Ports:** Each port can be configured independently for RS232, RS422, or RS485 operation. - **Selectable Interface via DIP Switch:** Hardware DIP switches allow per-port configuration without software intervention. - **High Compatibility:** Fully compatible with PCI Express (PCIe) bus architecture; plug-and-play installation. - **ADDC (Auto Data Direction Control):** Built-in ADDC feature for RS485 mode ensures automatic data direction management, eliminating the need for manual RTS control. - **Industrial-Grade Design:** Designed for industrial control environments with robust signal integrity and wide environmental tolerance. - **Multi-OS Support:** Compatible with Windows 2000, XP, Vista, Windows 7, and Linux operating systems. - **Plug & Play Resource Allocation:** I/O mapping, memory mapping, and IRQ assignments are automatically managed by the PCI BIOS. - **DB37 Connector Interface:** The card uses a DB37 female connector, with included breakout cable to four DB9 male connectors. - **Flexible Cable Options:** Supports optional DB37-to-DB25 (A400 cable) or DB37-to-DB9 (P485 cable) expansion cables. - **Compact Form Factor:** Standard PCIe bracket with dimensions of 82 mm × 97 mm. - **High Reliability:** 128-byte transmit and receive FIFO buffers per port reduce CPU load and prevent data loss. - **Flow Control Support:** Supports both hardware (RTS/CTS) and software (Xon/Xoff) flow control. - **Industrial Temperature Range:** Operates from 0°C to 55°C with humidity tolerance up to 95% RH.

Manufacturer: Rayon

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Four Independent Serial Ports:** Two RS232 ports (Port A & B) and two isolated RS422/RS485 ports (Port C & D). - **Selectable Interface Modes:** RS422 or RS485 modes selectable per port via DIP switch. - **Ground Isolation:** Ports C and D feature galvanic isolation to prevent ground loops and protect connected equipment from electrical noise and surges. - **High-Performance Controller:** Each port is managed by a Moschip MCS9904 serial communication controller, providing robust and reliable data handling. - **Wide Baud Rate Range:** Supports baud rates from 50 bps to 115,200 bps, configurable per port. - **Plug & Play PCIe Interface:** Fully compliant with PCI Express bus architecture; I/O, memory, and IRQ resources automatically assigned by the PCI BIOS. - **ADDC (Auto Data Direction Control):** Built-in ADDC feature for RS485 mode ensures automatic transmit/receive direction control without software intervention. - **Industrial-Grade Design:** Engineered for industrial control environments with extended temperature and humidity tolerance. - **Comprehensive OS Support:** Compatible with Windows 2000, XP, Vista, Windows 7, and Linux operating systems. - **Flexible Cabling Options:** Includes DB37 female connector and DB37-to-4×DB9 male cable; optional DB37-to-4×DB25 male cable available. - **Compact PCIe Form Factor:** Standard PCIe bracket with 120 × 105 mm PCB dimensions. - **Enhanced System Efficiency:** 128-byte transmit and receive FIFO buffers per port reduce CPU interrupt load and improve throughput. - **Ideal for Industrial Automation:** Suitable for SCADA systems, PLC communication, CNC machines, and serial device networking.

Manufacturer: Rayon

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Triple Interface Support:** Each of the four ports can be individually configured for RS-232, RS-422, or RS-485 communication. - **High-Speed Operation:** Supports baud rates from 50 bps to 921.6 kbps, with selectable normal and high-speed spectra (up to 8× standard rates). - **Isolation Protection:** Provides up to 2000 V isolation for RS-422 and RS-485 ports, ensuring reliable operation in electrically noisy environments. - **Flexible Configuration:** Independent I/O address and IRQ settings for each port; configurable via software utility (IO-IRQ.EXE). - **UART Compatibility:** Equipped with four 16C550C-compatible UARTs with 16-byte FIFO buffers for efficient data handling and hardware flow control. - **ISA/EISA Bus Interface:** 16-bit AT bus architecture supporting IRQs 2–5, 7, 10–12, and 15. - **Auto Data Direction Control:** RS-485 ports support automatic data direction switching for half-duplex communication. - **Comprehensive OS Support:** Native drivers for Windows NT, Windows 95/98, DOS, and Windows 3.x; compatible with Linux, SCO UNIX, OS/2, and others. - **Diagnostic and Development Tools:** Bundled with Moxa’s PComm communication library and utilities for diagnostics, monitoring, and programming. - **Industrial Reliability:** Designed for system integrators and OEMs requiring robust, high-performance multiport serial communication solutions.

Manufacturer: Moxa

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Triple Interface Support:** Each of the four ports can be individually configured as RS-232, RS-422, or RS-485, allowing mixed-mode operation on a single board. - **High-Speed Communication:** Supports data rates from 50 bps up to 921.6 Kbps, with selectable normal and high-speed spectra (up to 8× standard baud rates). - **Advanced UART Architecture:** Equipped with four 16C550C-compatible UARTs featuring 16-byte FIFO buffers for reliable high-speed asynchronous communication. - **Independent Configuration:** Each port supports independent I/O address and IRQ settings, ensuring compatibility with diverse system configurations. - **Isolation Protection:** Provides up to 2000 V isolation for RS-422/RS-485 interfaces, protecting against electrical surges and ground loops. - **Auto Data Direction Control:** RS-485 ports support automatic data direction switching, simplifying half-duplex communication. - **Flexible Bus Interface:** 16-bit ISA (EISA compatible) bus interface for legacy and industrial PC systems. - **Software Configurable:** On-board EEPROM stores configuration parameters accessible via Configuration Access Port (CAP). - **Comprehensive OS Support:** Compatible with Windows NT/95/98, DOS, Windows 3.x, Linux, SCO UNIX/XENIX, OS/2, QNX, FreeBSD, and other multiuser operating systems. - **Diagnostic and Development Tools:** Bundled with Moxa’s PComm library and utilities for diagnostics, monitoring, and application development. - **Industrial Reliability:** Designed for continuous operation in industrial environments with robust electrical and mechanical design.

Manufacturer: Moxa

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Dual Interface Support:** Provides two independent RS-232 ports and two RS-485/422 ports, enabling simultaneous communication with multiple serial devices. - **PCI Express Interface:** Fully compliant with PCI Express standards, ensuring high-speed data transfer and compatibility with modern PC architectures. - **High-Speed Communication:** Supports data rates up to **921.6 kBd**, allowing for fast and reliable serial data transmission. - **Advanced UART Controller:** Equipped with **16550-compatible UARTs** featuring **128-byte FIFO buffers**, minimizing CPU load and improving data throughput. - **Flexible Configuration:** Each port can be configured independently for RS-232 or RS-485/422 operation, depending on the application requirements. - **Compact Design:** The card measures **114 mm x 104 mm**, suitable for standard PCIe slots in desktop and industrial PCs. - **Low Power Requirement:** Operates solely on **3.3V DC**, reducing power consumption and heat generation. - **Multi-Board Support:** Up to **four COM-8524 boards** can be installed in a single PC system, expanding the number of available serial ports. - **Durable Connectors:** Includes **two DB9 male D-sub connectors** for RS-232 and RS-485/422 interfaces, ensuring secure and reliable physical connections. - **Included Bracket:** Comes with an **SM23410 bracket** for COM2 and COM3 ports, providing easy access to all four serial channels. - **Industrial Reliability:** Designed for continuous operation in demanding environments, with stable signal integrity and robust electrical isolation.

Manufacturer: JS Automation

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Four Independent Serial Ports:** Each of the four ports can be freely configured as RS-232, RS-422, or RS-485, offering maximum flexibility for mixed serial communication environments. - **PCI Express Interface:** Utilizes the PCIe bus for high-speed data throughput and low latency, ensuring compatibility with modern PC architectures. - **High-Speed Communication:** Supports data rates up to **921.6 kBd**, suitable for demanding industrial and instrumentation applications. - **Advanced UART Controller:** Equipped with **16550-compatible UARTs** featuring **128-byte FIFO buffers** per channel, minimizing CPU load and ensuring smooth data transmission even under heavy traffic. - **Flexible Connectivity:** Includes **two DB9 male D-sub connectors** on the main bracket and an additional **SM23410 bracket** providing two more DB9 male connectors for COM2 and COM3. - **Multi-Board Support:** Up to **four COM-8544 cards** can be installed in a single PC system, enabling expansion to 16 serial ports. - **Low Power Requirement:** Operates solely on **3.3V DC** supplied through the PCIe slot, eliminating the need for external power sources. - **Compact Design:** Small form factor (114 mm × 104 mm) suitable for standard and compact PC enclosures. - **Industrial Reliability:** Designed for continuous operation in industrial environments, ensuring stable communication and long-term durability.

Manufacturer: JS Automation

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Triple‑Interface Support:** Each board supports RS‑232, RS‑422, and RS‑485 communication standards. Ports 1 and 2 are configurable for RS‑232 or RS‑422/485; ports 3 and 4 are fixed as RS‑422/485. - **Plug‑and‑Play PCI Compliance:** Fully compliant with PCI Specification 2.1. No DIP switches or jumpers required for IRQ or I/O address configuration—BIOS automatically assigns resources. - **High‑Speed Data Transfer:** Supports baud rates from 50 bps up to 921.6 Kbps per port with 16C550C UARTs and 16‑byte Tx/Rx FIFO buffers. - **Automatic Data Direction Control (ADDC):** Built‑in hardware intelligence for RS‑485 half‑duplex communication eliminates the need for software‑based direction control. - **On‑board Termination Resistors:** Integrated 120‑ohm termination resistors for RS‑422/485 impedance matching, selectable via jumpers. - **Surge and Isolation Protection:** Optional 25 kV ESD surge protection and 2 kV optical isolation (available on CP‑114I/CP‑114IS models) for enhanced reliability in harsh industrial environments. - **Compact Half‑Size PCI Form Factor:** Board dimensions 135 mm × 110 mm (CP‑114/CP‑114S). - **Comprehensive OS Support:** Drivers available for Windows NT, Windows 95/98, and DOS. - **Powerful Software Tools:** Bundled with Moxa’s _PComm Lite_ (Windows) and _API‑232_ (DOS) programming libraries, diagnostic utilities, and terminal emulators. - **Multi‑Board Support:** Up to four CP‑114 boards can be installed in a single system. - **Industrial‑Grade Reliability:** Designed for factory automation, SCADA, remote device control, and embedded industrial systems.

Manufacturer: Moxa

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Triple‑Interface Support:** Each port independently selectable for RS‑232, RS‑422, or RS‑485 communication. - **Optical Isolation:** 2 kV DC isolation protection on RS‑422/485 ports to prevent ground loop and surge damage. - **Surge Protection:** 25 kV ESD protection on all signal lines for enhanced reliability in noisy environments. - **High‑Speed Data Transfer:** Supports baud rates from 50 bps to 921.6 Kbps per port. - **Automatic Data Direction Control (ADDC):** Built‑in hardware intelligence for 2‑wire RS‑485 half‑duplex communication, eliminating the need for software‑based direction control. - **On‑board Termination Resistors:** 120 Ω termination resistors pre‑installed and jumper‑selectable for RS‑422/485 impedance matching. - **Plug‑and‑Play PCI Compliance:** Fully compliant with PCI Specification 2.1; IRQ and I/O addresses automatically assigned by BIOS. - **High‑Performance UARTs:** Four 16C550C UARTs with 16‑byte Tx/Rx FIFO buffers and hardware flow control to ensure data integrity at high speeds. - **Compact Half‑Size PCI Form Factor:** 160 mm × 120 mm board size suitable for standard PC enclosures. - **Multi‑OS Support:** Drivers available for Windows NT, Windows 95/98, and DOS. - **Comprehensive Software Tools:** Bundled with Moxa’s PComm Lite (Windows) and API‑232 (DOS) programming libraries and utilities for diagnostics, monitoring, and terminal emulation. - **Industrial‑Grade Reliability:** Designed for factory automation, SCADA, remote device control, and embedded industrial systems.

Manufacturer: Moxa

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Triple‑Interface Support:** Each port selectable for RS‑232, RS‑422, or RS‑485 communication. - **Four Independent Channels:** 4 asynchronous serial ports, each with its own 16C550C UART and 16‑byte Tx/Rx FIFO. - **High‑Speed Data Transfer:** Supports baud rates from 50 bps to 921.6 Kbps per port. - **Optical Isolation:** 2000 V DC isolation on RS‑422/485 ports to protect against ground loops and voltage surges. - **Surge Protection:** 25 kV ESD protection on all signal lines to prevent damage from electrostatic discharge. - **Automatic Data Direction Control (ADDC):** Hardware‑based RS‑485 half‑duplex control eliminates software overhead. - **Termination Resistors On‑Board:** Built‑in 120 Ω termination resistors for RS‑422/485 impedance matching. - **Plug‑and‑Play PCI Interface:** Fully compliant with PCI 2.1 specification; IRQ and I/O addresses assigned automatically by BIOS. - **Compact Half‑Size Design:** Fits standard PCI slots without occupying excessive space. - **Multi‑OS Support:** Drivers for Windows NT, Windows 95/98, and DOS included. - **Comprehensive Software Tools:** Bundled with Moxa’s PComm Lite (Windows) and API‑232 (DOS) libraries for application development. - **Industrial‑Grade Reliability:** Designed for continuous operation in factory automation, SCADA, and embedded control systems.

Manufacturer: Moxa

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **3‑in‑1 Serial Interface:** Each port independently selectable for RS‑232, RS‑422, or RS‑485 operation. - **Four Asynchronous Channels:** 4‑channel asynchronous serial communication with 16C550C UART controllers. - **High‑Speed Data Transfer:** Supports baud rates from 50 bps up to 921.6 Kbps per port. - **Plug‑and‑Play PCI Interface:** Fully compliant with PCI Specification 2.1; automatic IRQ and I/O address assignment by BIOS. - **Automatic Data Direction Control (ADDC):** Built‑in hardware intelligence for RS‑485 half‑duplex communication, eliminating software control overhead. - **On‑board Termination Resistors:** Integrated 120‑ohm termination resistors for RS‑422/485 impedance matching. - **Surge Protection:** 25 kV ESD protection on all signal lines to prevent damage from electrostatic discharge. - **Compact Half‑Size PCI Board:** Dimensions 135 mm × 110 mm, suitable for standard PC enclosures. - **Optical Isolation (optional on other models):** Up to 2 kV DC isolation available on CP‑114I/IS variants. - **Operating System Support:** Drivers for Windows NT, Windows 95/98, and DOS. - **Software Tools:** Bundled with Moxa’s PComm Lite (Windows) and API‑232 (DOS) programming libraries and utilities. - **Industrial Reliability:** Designed for harsh environments with robust electrical protection and stable performance. - **Multi‑drop Capability:** Each RS‑422/485 port can control up to 32 devices in a networked configuration. - **Hardware Flow Control:** On‑chip hardware flow control ensures data integrity and prevents data loss. - **Comprehensive Software Support:** Includes diagnostic, monitoring, and terminal emulation utilities for testing and development.

Manufacturer: Moxa

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Universal PCI Interface:** Supports both **3.3V and 5V PCI slots**, ensuring compatibility with a wide range of motherboards and industrial PCs. - **Four Independent Serial Ports:** Each port can be individually configured as **RS232**, **RS422**, or **RS485**, providing maximum flexibility for mixed communication environments. - **Intelligent Plug & Play Configuration:** Fully compliant with PCI Plug & Play standards. The system automatically assigns **IRQ** and **I/O mapping** through the PCI BIOS, simplifying installation and configuration. - **High-Speed Communication:** Each port supports baud rates from **50 bps to 115,200 bps**, suitable for a wide range of serial devices and applications. - **16550A-Compatible UARTs:** Each port uses a **16550A-compatible UART** with integrated FIFO buffers, ensuring stable data transmission and reduced CPU overhead. - **Auto Data Direction Control (RS485):** Built-in automatic data direction control for RS485 mode eliminates the need for manual RTS signal handling, improving communication efficiency in half-duplex networks. - **Flexible Power Design:** Operates using **5V power supply only**, simplifying system integration and ensuring stable operation across all supported serial modes. - **Broad Operating System Support:** Compatible with **DOS**, **Windows 95/98/Me**, **Windows NT**, **Windows 2000/XP**, **Windows Vista/7 (32-bit)**, **Linux**, and **SCO OpenServer**. - **Compact Form Factor:** Small PCB footprint (120 mm × 100 mm) suitable for space-constrained industrial systems. - **Industrial-Grade Reliability:** Designed for continuous operation in environments with wide temperature and humidity ranges.

Manufacturer: Rayon

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Universal PCI Compatibility:** Supports both 3.3V and 5V PCI slots, ensuring broad compatibility with a wide range of motherboards and industrial PCs. - **4-Port RS422/RS485 Interface:** Provides four independent serial communication ports for industrial control, automation, and data acquisition systems. - **16550A-Compatible UARTs:** Each port includes a 16550A-compatible UART with 16-byte FIFO buffers, ensuring stable and efficient data transmission. - **High-Speed Communication:** Supports baud rates from 50 bps up to 115,200 bps per port, suitable for high-performance serial communication tasks. - **Plug & Play Configuration:** Automatic IRQ and I/O address assignment via PCI BIOS simplifies installation and configuration. - **Surge Protection:** Integrated surge protection on TXD and RXD signal lines enhances reliability in electrically noisy environments. - **5V Power Supply Operation:** Designed for systems that provide only 5V power, ensuring compatibility with legacy industrial platforms. - **Flexible Connector Options:** Includes a DB37 female to 4×DB9 male cable (DB25 male cable available upon request). - **Cross-Platform Driver Support:** Compatible with multiple operating systems including DOS, Windows (95/98/Me/NT/2000/XP/Vista/7), Linux, SCO, and UNIX. - **Compact Design:** Small form factor (120 mm × 100 mm) suitable for space-constrained enclosures. - **Industrial-Grade Build:** Designed for continuous operation in demanding environments with wide temperature and humidity tolerance.

Manufacturer: Rayon

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Multi-Port Serial Expansion:** Provides four independent serial communication ports—three RS-232 and one RS-422/RS-485 (isolated)—for connecting multiple serial devices to a single PCI slot. - **Intelligent PCI Interface:** Utilizes an ASIC-based PCI controller that fully implements PCI Local Bus Specification Rev. 2.1, ensuring automatic configuration of I/O addresses and interrupts via the system BIOS. - **High Compatibility:** Each port is 16550A UART compatible, supporting standard serial communication protocols and baud rates from 50 to 115,200 bps. - **Auto Data Direction Control (ADDC):** The RS-485 port includes automatic data direction control for half-duplex communication, eliminating the need for manual RTS signal management. - **Plug & Play Configuration:** IRQ and I/O address assignments are automatically managed by the PCI BIOS, simplifying installation and avoiding resource conflicts. - **Shared IRQ Support:** Multiple PCIPORT cards can share a single IRQ, allowing up to eight cards per system for a total of 32 serial ports. - **Flexible Connector Options:** Includes a DB37 female connector on the card and a breakout cable (DB37F to 4×DB9M standard, or 4×DB25M optional). - **Cross-Platform Driver Support:** Compatible with DOS, Windows 95/98/ME/NT/2000/XP, Linux, and SCO OpenServer. - **Industrial-Grade Design:** Built with high-quality components and optional isolation for RS-422/RS-485 communication, ensuring reliable operation in electrically noisy environments.

Manufacturer: Rayon

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Multi-Interface Support:** Provides **two RS232 ports** and **two RS422/RS485 ports** on a single PCI card, enabling flexible serial communication configurations. - **Universal PCI Compatibility:** Operates with both **3.3V and 5V PCI slots** at **33 MHz**, ensuring broad compatibility across desktop and industrial PC platforms. - **High-Speed Serial Communication:** Each port supports baud rates from **50 bps to 115,200 bps**, suitable for a wide range of serial devices and applications. - **16550A UART Compatibility:** Each port is equipped with a **16550A-compatible UART** featuring a **32-byte FIFO buffer**, ensuring efficient data handling and reduced CPU load. - **Auto Data Direction Control (ADDC):** RS485 ports feature **automatic data direction control**, simplifying half-duplex communication without requiring manual RTS signal management. - **Surge Protection:** Built-in **surge protection** on TXD and RXD signal lines enhances reliability and safeguards connected devices in electrically noisy environments. - **Plug & Play Configuration:** Fully **PCI Plug & Play compliant**, with **IRQ and I/O address mapping** automatically assigned by the system BIOS. - **Flexible Connector Options:** Includes a **DB37 female to 4×DB9 male cable** (A400 cable). Optional **DB25 male connectors** are available upon request. - **Cross-Platform Driver Support:** Compatible with **DOS**, **Windows 95/98/ME/NT/2000/XP/Vista/Win7**, **Linux**, **UNIX**, and **SCO OpenServer** operating systems. - **Compact Design:** Small form factor (122 × 86 mm) suitable for standard PCI slots in industrial PCs and workstations.

Manufacturer: Rayon

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Multi-Protocol Serial Support:** Each of the four ports can be independently configured as RS232, RS422, or RS485, providing maximum flexibility for mixed communication environments. - **5V PCI Bus Compatibility:** Designed specifically for 5V PCI slots, ensuring stable operation in legacy and industrial PC systems. - **Intelligent Plug & Play Architecture:** Fully PCI Plug & Play compliant, with automatic I/O address and IRQ assignment handled by the PCI BIOS. - **High Compatibility:** Supports a wide range of operating systems including DOS, Windows 95/98/Me, Windows NT, Windows 2000/XP, Windows 7/8/10, Linux, and SCO OpenServer. - **Auto Data Direction Control (RS485):** Built-in automatic data direction control for RS485 communication eliminates the need for manual RTS signal handling, simplifying half-duplex communication. - **16550A UART Compatibility:** Each port uses a 16550A-compatible UART with 16-byte FIFO buffers, ensuring reliable high-speed data transmission and reduced CPU overhead. - **Flexible Connector Options:** Ships with a DB37 female to 4×DB9 male breakout cable (DB25 male version available upon request). - **Compact Design:** Small form factor (120 mm × 100 mm) suitable for standard desktop or industrial PC enclosures. - **Industrial-Grade Reliability:** Operates in wide environmental conditions (0°C–55°C, 10–95% RH) suitable for industrial and laboratory use. - **Shared IRQ Mapping:** Efficient resource utilization through a single shared IRQ for all four ports, minimizing system conflicts. - **Selectable Baud Rate:** Each port supports baud rates from 50 to 115,200 bps, covering most serial communication requirements. - **Extended Product Line:** Part of Rayon’s 5V-only PCI serial card family, offering 4-port and 8-port variants for different application scales.

Manufacturer: Rayon

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Four Independent Serial Ports:** Two RS232 ports (Ports A and B) and two RS422/RS485 ports (Ports C and D), selectable via DIP switch and jumper configuration. - **High Compatibility:** Each port is 16550A UART compatible, ensuring compatibility with standard serial communication software and hardware. - **Flexible Interface Selection:** RS422/RS485 ports can be configured individually for either RS422 or RS485 operation using onboard jumpers (JP5). - **Automatic Data Direction Control (ADDC):** Built-in ADDC function for RS485 communication eliminates the need for manual RTS signal control. - **Plug & Play PCI Interface:** Fully compliant with PCI Local Bus Specification Rev. 2.1. All resource assignments (IRQ, I/O address) are automatically managed by the PCI BIOS. - **Shared IRQ Support:** Supports IRQ sharing among multiple PCI devices, simplifying system integration. - **High-Speed Communication:** Supports baud rates from 50 bps up to 115.2 Kbps (1.8432 MHz crystal) or up to 921.6 Kbps (14.7456 MHz crystal). - **Comprehensive OS Support:** Compatible with DOS, Windows 95/98/ME/NT/2000/XP, Linux, and SCO OpenServer. - **Multi-Card Support:** Up to two P924 cards can be installed in a single system, providing up to eight serial ports. - **Included Expansion Cable:** Comes with a DB37 female to 4×DB9 male connector cable (DB25 male version available upon request). - **Compact Design:** Dimensions of 122 mm × 101 mm, suitable for standard PCI slots.

Manufacturer: Rayon

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **PCI Express x1 Compliant:** Fully compatible with PCI Express x1 slots, ensuring broad compatibility with modern industrial PCs and servers. - **Multi‑Protocol Serial Support:** Each of the four ports can be configured for RS‑232, RS‑422, or RS‑485 (2‑wire or 4‑wire) operation, providing maximum flexibility for connecting diverse serial devices. - **High Baud Rate Range:** Supports data rates from 50 bps up to 921.6 Kbps, suitable for both legacy and high‑speed serial communications. - **128‑Byte FIFO Buffer:** Each port includes a 128‑byte FIFO for efficient data handling and reduced CPU overhead. - **Flow Control Options:** Supports both hardware (RTS/CTS) and software (Xon/Xoff) flow control mechanisms. - **Low‑Profile Design:** Compact 67.2 × 104.8 mm form factor suitable for small‑form‑factor PCs and embedded systems. - **Industrial‑Grade Reliability:** Operating temperature range of ‑40 °C to +75 °C and humidity tolerance of 5 %–95 % non‑condensing. - **Surge and ESD Protection:** - Standard model: ESD protection up to 15 kV (air) / 8 kV (contact). - “‑S” model: Additional 6 kV signal surge protection per IEC 61000‑4‑5. - **LED Indicators:** - Green LED for TX (transmit activity). - Amber LED for RX (receive activity). - **Power Efficiency:** Operates from 3.3 V DC with a typical current draw of 835 mA. - **Comprehensive Modem Control Signals:** Full RS‑232 modem control lines (TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND) ensure compatibility with a wide range of serial peripherals. - **Long‑Term Reliability:** Backed by a 5‑year manufacturer warranty.

Manufacturer: JS Automation

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **PCI Express x1 Compliant:** Fully compatible with PCI Express x1 interface, ensuring broad compatibility with modern industrial PCs and embedded systems. - **Multi‑Protocol Serial Support:** Provides four independent serial ports configurable for RS‑232, RS‑422, or RS‑485 (2‑wire or 4‑wire) operation. - **High Isolation Protection:** 3 kV galvanic isolation between ports and system bus to protect against ground loops and electrical surges. - **Enhanced ESD Protection:** IEC 61000‑4‑2 compliant with 15 kV air and 8 kV contact discharge protection. - **Wide Baud Rate Range:** Supports baud rates from 50 bps to 921.6 Kbps, suitable for a wide range of serial devices. - **128‑Byte FIFO Buffer:** Reduces CPU overhead and ensures stable data transmission at high speeds. - **Flow Control Options:** Supports both hardware (RTS/CTS) and software (Xon/Xoff) flow control for flexible communication management. - **Low‑Profile Design:** Compact 67.2 × 136.8 mm PCB suitable for small‑form‑factor PCs and embedded systems. - **LED Indicators:** Individual TX (green) and RX (amber) LEDs for each port provide clear visual status of data transmission and reception. - **Industrial Temperature Range:** Operates reliably from ‑40 °C to +75 °C, with storage capability up to +85 °C. - **Power Efficiency:** Operates on 3.3 V DC with a typical current draw of 1,150 mA. - **Long‑Term Reliability:** Backed by a 5‑year manufacturer warranty.

Manufacturer: JS Automation

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **PCI Express x1 Compliant:** Fully compatible with PCI Express x1 slots, supporting plug‑and‑play installation in modern PCs and industrial computers. - **Multi‑Protocol Serial Support:** Each of the four ports can be configured for RS‑232, RS‑422, or RS‑485 (2‑wire or 4‑wire) communication modes. - **High Surge and ESD Protection:** - Surge protection up to **6 kV** (signal lines, –S model only). - ESD protection up to **15 kV air discharge** and **8 kV contact discharge**. - **Wide Baud Rate Range:** Supports serial communication speeds from **50 bps to 921.6 kbps**, suitable for both legacy and high‑speed serial devices. - **128‑Byte FIFO Buffer:** Reduces CPU overhead and ensures stable data transmission under heavy load. - **Hardware and Software Flow Control:** Supports RTS/CTS and Xon/Xoff flow control mechanisms for reliable data exchange. - **Low‑Profile Design:** Compact PCB (67.2 × 104.8 mm) suitable for small‑form‑factor PCs and embedded systems. - **LED Indicators:** - **TX (Green):** Indicates data transmission. - **RX (Amber):** Indicates data reception. - **Industrial Temperature Range:** Operates reliably from **–40 °C to +75 °C**, with storage capability up to +85 °C. - **Power Efficiency:** Operates on **3.3 V DC**, consuming approximately **835 mA**. - **Comprehensive Modem Control Signals:** Full RS‑232 signal set (TxD, RxD, RTS, CTS, DTR, DSR, DCD, GND) for compatibility with a wide range of serial peripherals. - **Extended Warranty:** Backed by a **5‑year manufacturer warranty**.

Manufacturer: Rayon

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **PCI Express x1 Compliant:** Fully compatible with PCI Express x1 interface, ensuring high‑speed data transfer and broad system compatibility. - **Multi‑Protocol Serial Support:** Provides four independent serial ports configurable for RS‑232, RS‑422, or RS‑485 (2‑wire or 4‑wire) operation. - **High Electrical Protection:** - 3 kV isolation between ports and system bus. - 6 kV surge protection on signal lines (‑SI models). - ESD protection: 15 kV (air) / 8 kV (contact). - **Wide Baud Rate Range:** Supports baud rates from 50 bps to 921.6 kbps, suitable for a wide range of industrial serial devices. - **128‑Byte FIFO Buffer:** Ensures stable and efficient data transmission with minimal CPU load. - **Flow Control Options:** Hardware (RTS/CTS) and software (Xon/Xoff) flow control supported. - **Low‑Profile Form Factor:** Compact 67.2 × 136.8 mm design ideal for small‑form‑factor PCs and embedded systems. - **LED Indicators:** - Green LED for TX (transmit activity). - Amber LED for RX (receive activity). - **Rugged Industrial Design:** Wide operating temperature range (‑40 °C to +75 °C) and humidity tolerance (5 %–95 % non‑condensing). - **Power Efficiency:** Operates on 3.3 V DC, consuming approximately 1,150 mA. - **Comprehensive Certification:** Meets EMC, EMI, and EMS standards for industrial environments. - **Long‑Term Reliability:** Backed by a 5‑year manufacturer warranty.

Manufacturer: Rayon

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Four-Port Serial Expansion:** Provides 3 × RS-232 and 1 × RS-422 serial ports via RJ45 connectors. - **PCI Bus Interface:** Fully compliant with PCI Local Bus Specification Rev. 2.1, supporting both 5V and 3.3V PCI slots. - **Plug & Play Configuration:** Automatic resource allocation (I/O address and IRQ) by PCI BIOS; no manual configuration required. - **High-Speed Communication:** Supports baud rates up to 115.2 Kbps (standard) or 921.6 Kbps with optional 14.7456 MHz crystal. - **Intelligent Serial Controller:** 16C550A-compatible UART with 16-byte transmit and receive FIFO buffers per port, reducing CPU load and improving throughput. - **Multi-Card Support:** Up to 8 cards per system, allowing up to 32 serial ports in one PC. - **Flexible Interface Options:** Supports RS-232, RS-422, and RS-485 signaling standards through jumper or DIP switch configuration. - **Surge and Isolation Options:** Compatible with Rayon’s RS4232-4 and RS4232-8 isolation boxes for galvanic isolation and surge protection. - **Comprehensive OS Support:** Drivers available for Windows 95/98/Me, Windows NT4.0, Windows 2000/XP, DOS, Linux, and SCO OpenServer. - **Industrial Reliability:** Designed for continuous operation in industrial environments with robust PCB design and EMI-resistant components. - **RJ45 Connectivity:** Compact RJ45 connectors simplify cabling and integration into structured wiring systems.

Manufacturer: Rayon

Category: RS232 Mixed RS485 / RS422 4-Ports PCI

- **Four Independent Communication Ports:** Each of the four ports can be individually configured for RS232, RS422, or RS485 operation using DIP switches. - **Full Electrical Isolation:** Every port is galvanically isolated from the others and from the host system ground, preventing ground loops and protecting against electrical surges. - **Mixed‑Mode Operation:** Supports simultaneous use of different interface standards across ports (e.g., two RS232 and two RS485). - **Selectable Impedance and Termination:** Jumper‑selectable impedance settings for RS422/RS485 modes allow proper line termination and signal integrity over long cable runs. - **Built‑In Power Supply:** Integrated universal power supply accepts **90–260 VAC** or **–48 VDC** input, eliminating the need for external adapters. - **Status Indication:** Each port includes **TXD/RXD LED indicators** for real‑time monitoring of transmit and receive activity. - **Flexible Connectivity:** Input via **DB37 male connector**; output via four **DB25 male connectors** (one per port). - **Compact Industrial Enclosure:** Rugged metal housing with dimensions **298 × 135 × 55 mm**, suitable for rack or panel mounting. - **Auto Data Direction Control (RS485):** Built‑in automatic data direction management ensures half‑duplex RS485 communication without manual RTS control. - **Compatibility:** Designed for use with RAYON PCIPORT four‑port PCI cards (P584/P485/P984/P524U series) through A640 or equivalent cables.

Manufacturer: Rayon

Category: RS232 Mixed RS485 / RS422 4-Ports PCI