- **Four independent serial ports** supporting RS‑232, RS‑422, RS‑485 (2‑wire and 4‑wire) interfaces. - **High‑speed data transmission** from 50 bps to 921.6 kbps per port. - **PCI Express ×1 bus interface**, compliant with PCI Express Spec 1.1, compatible with x1, x2, x4, x8, x16 slots. - **Low‑profile design** suitable for small‑form‑factor PCs and embedded systems. - **15 kV ESD protection** on all signal lines for industrial reliability. - **ADDC™ (Automatic Data Direction Control)** for RS‑485 half‑duplex communication, eliminating manual RTS control. - **Intelligent RS‑485 auto‑tuning** for bias and termination resistor optimization. - **Built‑in LED indicators** for data flow and port status monitoring. - **128‑byte FIFO buffers** with hardware and software flow control. - **Comprehensive OS support:** Windows (2000 through 10 and Server 2016), Linux (32/64‑bit), DOS, SCO Unix, Windows CE. - **Diagnostic and management software** (PComm Lite, Moxa Serial Comm Tool) for configuration, testing, and monitoring. - **Optional 2 kV optical isolation** (CP‑114EL‑I) for enhanced protection in noisy environments. - **Multiple connector options:** DB9 male (CBL‑M44M9x4‑50) or DB25 male (CBL‑M44M25x4‑50). - **5‑year manufacturer warranty** and global technical support.

Manufacturer: Moxa

Category: RS485 / RS422 4-Po

- **Four Independent Serial Ports:** Each board provides four RS-422/485 serial ports, supporting full-duplex and half-duplex communication modes. - **Universal PCI Compatibility:** Supports both 3.3 V and 5 V PCI and PCI-X slots, ensuring broad compatibility with modern and legacy systems. - **High-Speed Data Transmission:** Supports baud rates from 50 bps up to 921.6 Kbps, enabling fast and reliable data exchange. - **Moxa Turbo Serial Engine™:** Integrated MU860 communication controller (16C550C compatible) with on-chip ADDC® (Automatic Data Direction Control) for precise RS-485 communication timing. - **ADDC® Technology:** Automatically manages data direction control for RS-485 communication, simplifying configuration and improving reliability. - **Enhanced FIFO Buffer:** 128-byte FIFO per port for efficient data handling and reduced CPU load. - **Surge and ESD Protection:** 15 kV ESD protection on all signal lines; CP-134U-I adds 2 kV optical isolation for additional safety. - **Multi-Protocol Support:** Ports 1 and 2 can be configured for RS-232, RS-422, or RS-485 operation. - **Wide OS Driver Support:** Compatible with Windows (2000, XP, 2003, Vista, CE 5.0, XP Embedded), Linux (2.4/2.6), FreeBSD, QNX, DOS, and Unix systems. - **Long-Distance Communication:** RS-485 multidrop capability supports up to 31 devices over distances up to 1.2 km. - **Industrial-Grade Reliability:** Designed for continuous operation in industrial environments with wide temperature and humidity tolerance. - **Comprehensive Regulatory Compliance:** Meets FCC, CE, and IEC industrial standards for electromagnetic compatibility and safety.

Manufacturer: Moxa

Category: RS485 / RS422 4-Po

- **4 Isolated RS-422/485 Ports:** Provides four independent serial communication channels for industrial devices. - **2 kV Optical Isolation:** Protects connected equipment from electrical surges and ground loops. - **15 kV ESD Protection:** Ensures robust operation in electrically noisy environments. - **High-Speed Data Transmission:** Supports baud rates from **50 bps to 921.6 Kbps**, with throughput exceeding **700 Kbps** for demanding applications. - **Moxa Turbo Serial Engine™:** Integrates hardware-based flow control and ADDC® (Automatic Data Direction Control) for precise RS-485 communication timing. - **Universal PCI Compatibility:** Works with both **3.3 V and 5 V PCI/PCI-X** slots, ensuring broad system compatibility. - **Flexible Interface Support:** Ports 1 and 2 can operate in **RS-232, RS-422, or RS-485** modes; all ports support RS-422/485. - **Extended Communication Range:** RS-485 multidrop capability supports up to **31 devices** over distances up to **1.2 km**. - **Comprehensive Driver Support:** Compatible with **Windows, Linux, Unix, DOS, and embedded OSs** such as Windows CE and XP Embedded. - **Industrial-Grade Reliability:** Designed for continuous operation in harsh industrial environments, with wide temperature and humidity tolerance. - **Compact Design:** Fits standard PCI slots with a board size of **115 x 120 mm**. - **Long-Term Support:** Backed by a **5-year warranty** and Moxa’s global technical support network.

Manufacturer: Moxa

Category: RS485 / RS422 4-Po

- **Multi-Port Connectivity:** Converts one DB37 male connector into four DB9 male connectors, enabling simultaneous connection of up to four serial devices. - **High Signal Integrity:** Designed with shielded conductors and precision-molded connectors to minimize electromagnetic interference (EMI) and ensure stable data transmission. - **Industrial-Grade Construction:** Built for demanding environments, featuring durable materials and strain-relief molded ends for long-term reliability. - **Compact Length:** The 0.15-meter (15 cm) cable length minimizes signal loss and clutter, ideal for panel-mounted or rack-integrated systems. - **Plug-and-Play Compatibility:** Fully compatible with standard DB37 and DB9 serial interfaces, requiring no additional configuration or adapters. - **Versatile Application:** Suitable for use in PLCs, CNC machines, motion controllers, test benches, and other automation or instrumentation systems. - **Precision Pin Mapping:** Each DB9 connector is wired according to standard serial communication pinouts, ensuring consistent and predictable signal routing. - **Secure Connection:** Gold-plated contacts and screw-lock mechanisms provide stable mechanical and electrical connections. - **Customizable Options:** Available in various lengths and configurations upon request for specific industrial setups.

Manufacturer: JS Automation

Category: RS485 / RS422 4-Po

- **Four Isolated Serial Ports:** Each port supports RS422 or RS485 communication, selectable via DIP switch. - **Electrical Isolation:** Each port is galvanically isolated to prevent ground loops and protect against electrical surges. - **Flexible Interface Configuration:** DIP switch selectable per port for RS422 (full-duplex) or RS485 (half-duplex) operation. - **ADDC (Auto Data Direction Control):** Automatic control of data direction in RS485 mode, eliminating the need for manual RTS signal handling. - **High Compatibility:** Fully compatible with 16550A UART standard, ensuring broad software and driver support. - **Plug & Play PCI Interface:** Automatic resource allocation (IRQ and I/O mapping) by PCI BIOS; no manual configuration required. - **Shared IRQ Support:** Multiple PCI cards can share a single interrupt line, optimizing system resource usage. - **Wide OS Support:** Drivers available for DOS, Windows 95/98/ME/NT/2000/XP, Linux, and SCO OpenServer. - **High-Speed Communication:** Supports baud rates from 50 bps up to 115,200 bps (standard crystal) or up to 921,600 bps (optional high-speed crystal). - **Robust Construction:** Designed for industrial and embedded PC environments requiring reliable multi-port serial communication. - **Included Cable:** A404 cable (DB37 female to 4×DB9 male) for direct connection to external serial devices.

Manufacturer: Rayon

Category: RS485 / RS422 4-Po

- **Four Independent Serial Ports:** Each port can be configured individually for RS422 or RS485 operation via DIP switches. - **Universal PCI Compatibility:** Supports both 3.3V and 5V PCI slots, ensuring compatibility with a wide range of modern and legacy systems. - **High Performance UARTs:** Each port uses a 16550A-compatible UART with 16-byte transmit and receive FIFOs, reducing CPU overhead and improving throughput. - **Automatic Data Direction Control (ADDC):** Built-in ADDC circuitry for RS485 mode automatically manages data direction, eliminating the need for software RTS control. - **Plug & Play Configuration:** IRQ and I/O address mapping are automatically assigned by the PCI BIOS. The card supports IRQ sharing across multiple PCI devices. - **Flexible Baud Rate Support:** Software-programmable baud rates from 50 to 115,200 bps (standard 1.8432 MHz crystal) or up to 921,600 bps (optional 14.7456 MHz crystal). - **Multi-OS Driver Support:** Compatible with DOS, Windows 95/98/ME/NT/2000/XP, Linux, and SCO OpenServer. - **Compact Form Factor:** PCB dimensions of 122 mm × 101 mm, suitable for standard PCI slots. - **Industrial-Grade Design:** Designed for robust operation in industrial environments, with optional termination resistors and isolated ground per port. - **Included Cable Assembly:** Ships with A404 cable (DB37 female to 4 × DB9 male connectors). Optional A400 cable (DB37 to 4 × DB25 male) available on request.

Manufacturer: Rayon

Category: RS485 / RS422 4-Po

- **Four Independent Serial Ports:** Each port can be configured individually for RS422 or RS485 operation. - **Auto Data Direction Control (ADDC):** Automatic control of data direction in RS485 mode eliminates the need for manual RTS signal handling. - **High Compatibility:** Fully compatible with 16550A UART standard, ensuring broad software and hardware support. - **Plug & Play PCI Interface:** Automatic IRQ and I/O address assignment by PCI BIOS; no manual configuration required. - **Flexible Power Support:** Operates on standard 5V PCI bus power; compatible with both 3.3V and 5V PCI slots. - **High-Speed Communication:** Supports baud rates from 50 to 115,200 bps per port. - **Multi-OS Support:** Compatible with DOS, Windows 95/98/Me/NT/2000/XP/7/8/10, Linux, and SCO OpenServer. - **Compact Design:** Small form factor (122 × 101 mm) suitable for standard PC enclosures. - **Expandable System:** Supports installation of up to two cards per system (total of 8 serial ports). - **Comprehensive Accessory Set:** Includes DB37-to-4×DB9 cable (A404); optional DB37-to-4×DB25 cable (A400) available. - **Industrial Reliability:** Designed for continuous operation in industrial and automation environments.

Manufacturer: Rayon

Category: RS485 / RS422 4-Po

- **Four RS422 Serial Ports:** Each port supports full-duplex RS422 communication for industrial and automation applications requiring long-distance, noise-resistant serial links. - **16550A UART Compatibility:** Each port integrates a 16C550A-compatible UART with 16-byte transmit and receive FIFOs, ensuring efficient data buffering and reduced CPU interrupts. - **High-Speed Communication:** Supports baud rates from 50 bps up to 115,200 bps (standard 1.8432 MHz crystal) or up to 921,600 bps with optional 14.7456 MHz crystal. - **Plug & Play PCI Interface:** Fully compliant with PCI Local Bus Specification Rev. 2.1. All I/O addresses, IRQs, and memory mappings are automatically assigned by the PCI BIOS. - **Shared IRQ Support:** Allows multiple PCI cards to share a single interrupt request line, optimizing system resource allocation. - **Flexible Flow Control:** Supports both hardware (RTS/CTS) and software (XON/XOFF) flow control mechanisms. - **Comprehensive OS Support:** Compatible with DOS, Windows 95/98/ME/NT/2000/XP, Linux, and SCO OpenServer. - **Expansion Cable Included:** Ships with a DB37 female to 4×DB9 male breakout cable (DB25 male version available on request as P985-25). - **Dual-Card System Support:** Up to two P985 cards can be installed in a single system, providing up to eight RS422 ports. - **Compact Design:** PCB dimensions of 121 mm × 102 mm, suitable for standard PCI slots. - **Industrial-Grade Reliability:** Engineered for stable operation in industrial and embedded PC environments.

Manufacturer: Rayon

Category: RS485 / RS422 4-Po

- **Four Independent Serial Ports:** Provides 4 channels of RS422/RS485 communication via a single PCIe slot, enabling simultaneous multi-device connectivity. - **Low-Profile PCIe Form Factor:** Compact design suitable for small form factor PCs, embedded systems, and industrial computers with limited expansion space. - **High-Speed Data Transmission:** Supports baud rates up to **921.6 kbit/s**, ensuring fast and stable serial communication for demanding industrial applications. - **Enhanced ESD Protection:** Built-in electrostatic discharge protection rated at **15 kV (air discharge)** and **8 kV (contact discharge)**, safeguarding the card and connected devices from electrical surges and static events. - **Large FIFO Buffer:** Each port features a **128-byte FIFO buffer**, improving data handling efficiency and minimizing CPU load during high-speed communication. - **Single Power Requirement:** Operates solely on **3.3 V DC** supplied through the PCI Express bus, eliminating the need for external power sources. - **Wide Operating Temperature Range:** Designed for industrial environments with an extended temperature range of **-40°C to +75°C**, ensuring reliable operation in both cold and hot conditions. - **DB44 Male Connector Interface:** Utilizes a **DB44 male D-sub connector** to provide all four serial channels through a single, compact interface. - **RS422/RS485 Mode Selection:** Supports both full-duplex (RS422) and half-duplex (RS485) communication modes, configurable per port. - **Industrial-Grade Reliability:** Engineered for continuous operation in mission-critical systems such as automation, transportation, and process control.

Manufacturer: JS Automation

Category: RS485 / RS422 4-Po

- **Four Isolated Serial Ports:** Provides 4 independent RS-422/RS-485 communication channels, enabling simultaneous multi-device connectivity. - **High-Speed Data Transmission:** Supports baud rates up to **921.6 kbps**, ensuring fast and stable data exchange for industrial communication protocols. - **Electrical Isolation:** Each port is **3 kV isolated**, protecting connected devices and the host system from ground loops, surges, and electrical noise. - **Enhanced ESD Protection:** Built-in electrostatic discharge protection rated at **15 kV (air discharge)** and **8 kV (contact discharge)**, ensuring reliable operation in harsh industrial environments. - **Low-Profile PCIe Design:** Compact form factor suitable for small industrial PCs, embedded systems, and rack-mounted servers with limited expansion space. - **Single Power Requirement:** Operates solely on **3.3 V DC** from the PCIe bus, eliminating the need for external power supplies. - **Wide Operating Temperature Range:** Designed for extreme conditions, with an operational range from **-40°C to +75°C**, suitable for both indoor and outdoor industrial applications. - **High Buffer Capacity:** Each port includes a **128-byte FIFO buffer**, improving data handling efficiency and minimizing data loss during high-speed communication. - **Unified Connector Interface:** Features a single **DB44 male D-sub connector** that consolidates all four serial channels, simplifying cabling and installation. - **Industrial Reliability:** Engineered for continuous operation in mission-critical environments such as factory automation, transportation systems, and energy management networks.

Manufacturer: JS Automation

Category: RS485 / RS422 4-Po

- **Four Independent Serial Ports:** Provides 4 channels of RS‑422/RS‑485 communication, allowing simultaneous multi‑device connectivity. - **Low‑Profile PCIe Form Factor:** Compact design suitable for small‑form‑factor PCs, embedded systems, and industrial controllers. - **High ESD and Surge Protection:** - ESD protection: ±15 kV (air discharge), ±8 kV (contact discharge) - Surge protection: ±6 kV per port These protections safeguard the card and connected devices from transient voltage spikes and electrostatic events. - **High Data Rate:** Supports baud rates up to **921.6 kbps**, ensuring fast and reliable serial communication. - **Large FIFO Buffer:** 128‑byte FIFO per port for efficient data handling and reduced CPU load during high‑speed communication. - **Single Power Requirement:** Operates from the PCIe slot’s **3.3 V DC** power rail, eliminating the need for external power sources. - **Wide Operating Temperature Range:** Designed for industrial environments with an operational range from **‑40 °C to +75 °C**. - **DB‑44 Male Connector:** Single high‑density **DB‑44 male D‑sub** connector consolidates all four serial channels, simplifying cabling and installation. - **Surge‑Protected Design:** Built‑in surge suppression circuitry enhances reliability in electrically noisy environments. - **Compatibility:** Fully compliant with PCI Express standards, ensuring plug‑and‑play integration with modern industrial PCs and servers.

Manufacturer: Rayon

Category: RS485 / RS422 4-Po

- **Four Isolated Serial Ports:** Provides 4 independent RS-422/RS-485 ports for multi-channel serial communication. - **PCI Express Interface:** Fully compliant with PCI Express standards, ensuring high-speed data transfer and compatibility with modern industrial PCs and servers. - **Electrical Isolation:** 3 kV isolation between each port and the host system, protecting equipment and data integrity from ground loops and electrical noise. - **Surge Protection:** Built-in 6 kV surge protection per port, safeguarding against transient voltage spikes and lightning-induced surges. - **ESD Protection:** Advanced ESD protection rated at 15 kV (air discharge) and 8 kV (contact discharge), ensuring reliable operation in static-prone environments. - **Low-Profile Design:** Compact form factor suitable for space-constrained industrial PCs and embedded systems. - **High-Speed Communication:** Supports baud rates up to 921.6 kbps, enabling fast and stable data transmission for demanding applications. - **Large FIFO Buffer:** 128-byte FIFO per port for efficient data handling and reduced CPU load during high-speed communication. - **Single Connector Interface:** Equipped with one DB44 male D-sub connector that breaks out to four serial channels, simplifying cabling and installation. - **Wide Operating Temperature Range:** Designed for extreme environments, operating reliably from -40°C to +75°C. - **Low Power Consumption:** Operates on a single 3.3 V DC power supply from the PCIe bus, minimizing energy usage and heat generation. - **Industrial Reliability:** Built for continuous operation in mission-critical systems, with robust components and industrial-grade design.

Manufacturer: Rayon

Category: RS485 / RS422 4-Po

- **Multi-Port Serial Interface:** Provides four independent asynchronous serial ports, allowing simultaneous communication with multiple RS422 or RS485 devices. - **Communication Standards:** Fully compliant with RS422 and RS485 differential signaling standards, enabling long-distance, noise-resistant data transmission. - **Data Rate Range:** Supports baud rates from 50 bps up to 57,600 bps, suitable for a wide range of industrial and instrumentation applications. - **UART Controller:** Each port is equipped with a 16450 UART (Universal Asynchronous Receiver/Transmitter), ensuring reliable buffering and data handling for asynchronous serial communication. - **ISA Bus Interface:** Designed for standard ISA bus architecture, compatible with legacy and industrial PC systems requiring ISA expansion slots. - **Interrupt Configuration:** Supports IRQ lines 2 through 7, allowing flexible interrupt assignment to avoid conflicts with other system devices. - **Adapter Cable Included:** Comes with a DB-62 to 4×DB25 adapter cable, providing convenient access to four standard DB25 serial connectors. - **Compact Industrial Design:** PCB dimensions of 215 mm × 100 mm, optimized for installation in standard ISA slots within industrial PCs or control systems. - **Asynchronous Operation:** Each port operates independently, supporting full-duplex communication and asynchronous data exchange. - **Robust Electrical Design:** RS422/485 differential signaling ensures high noise immunity and reliable communication over extended cable lengths.

Manufacturer: No category

Category: RS485 / RS422 4-Po

- **Four Isolated Serial Ports:** Each port can be independently configured for RS422 or RS485 operation, providing electrical isolation for industrial environments. - **Auto-Data-Direction-Control (ADDC):** Built-in automatic data direction control for RS485 communication eliminates the need for software-based RTS signal management. - **High Compatibility:** Fully compatible with 16550A UART standard, ensuring broad software and hardware interoperability. - **Plug & Play PCI Interface:** Automatic IRQ and I/O address assignment by PCI BIOS; no manual configuration required. - **Multi-OS Support:** Compatible with DOS, Windows 95/98/ME/NT/2000/XP/2003/Vista, Linux, SCO OpenServer, and UNIX systems. - **Industrial-Grade Design:** Designed for industrial control, automation, and data acquisition systems requiring robust and isolated serial communication. - **Flexible Baud Rate Configuration:** Supports baud rates from 50 bps to 115,200 bps per port. - **Shared IRQ Capability:** Supports IRQ sharing among multiple PCI cards, allowing up to two UP485I cards per system. - **Comprehensive Accessory Support:** Includes DB37-to-DB9 cable (A404) and supports optional terminal block adapters (TB485) and RS4232 isolation boxes.

Manufacturer: Rayon

Category: RS485 / RS422 4-Po

- **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