- **PCI Express x1 Compliant:** Fully compatible with PCI Express x1 interface, ensuring high-speed data transfer and broad system compatibility. - **Four RS-232 Ports:** Provides four independent RS-232 serial communication channels via a single DB44 connector. - **High Surge and ESD Protection:** - Surge protection up to 6 kV (signal lines, –S model only). - ESD protection: 15 kV (air discharge), 8 kV (contact discharge). - **Wide Baud Rate Range:** Supports baud rates from 150 bps to 921.6 Kbps, suitable for a wide variety of serial devices. - **128-Byte FIFO Buffer:** Ensures smooth data transmission and reception with minimal CPU overhead. - **Flow Control Support:** Hardware (RTS/CTS) and software (Xon/Xoff) flow control supported for reliable communication. - **Low Profile Design:** Compact form factor (67.2 x 104.8 mm) suitable for small form factor PCs and embedded systems. - **Full Modem Control Signals:** Provides DCD, DSR, DTR, RTS, CTS, and DCD signals for full modem compatibility. - **LED Indicators:** - Green LED for TX (transmit activity). - Amber LED for RX (receive activity). - **Industrial-Grade Reliability:** Designed for continuous operation in harsh environments with extended temperature and humidity tolerance. - **Power Efficiency:** Operates on 3.3 VDC with a current draw of 835 mA. - **Long-Term Warranty:** Backed by a 5-year manufacturer warranty.

Manufacturer: Rayon

Category: RS232 4-Ports

- **PCI Express x1 Compliant:** Fully compatible with PCI Express x1 interface, ensuring high‑speed data transfer and broad system compatibility. - **Four RS‑232 Serial Ports:** Provides four independent RS‑232 communication channels via a single DB44 connector. - **High Isolation and Surge Protection:** - 3 kV serial isolation between ports and system bus. - 6 kV surge protection on signal lines (specific to the “‑SI” model). - **Wide Baud Rate Range:** Supports baud rates from 150 bps up to 921.6 Kbps, accommodating a wide range of serial devices. - **128‑Byte FIFO Buffer:** Large FIFO buffer per port for efficient data handling and reduced CPU load. - **Flow Control Support:** Hardware (RTS/CTS) and software (Xon/Xoff) flow control for reliable data transmission. - **Low‑Profile Design:** Compact PCB (67.2 × 136.8 mm) suitable for small‑form‑factor PCs and embedded systems. - **LED Indicators:** - Green LED for TX (transmit activity). - Amber LED for RX (receive activity). - **Industrial‑Grade Protection:** - ESD protection: 15 kV (air), 8 kV (contact). - Surge protection: 6 kV (signal lines, SI model). - Isolation: 3 kV between serial ports and host system. - **Wide Operating Temperature:** ‑40 °C to +75 °C for reliable operation in extreme environments. - **Power Efficiency:** Operates from 3.3 V DC with a typical current draw of 1,150 mA. - **Long‑Term Reliability:** Backed by a 5‑year manufacturer warranty.

Manufacturer: Rayon

Category: RS232 4-Ports

- **Four Independent RS232 Ports:** Provides four fully functional RS232 serial ports, each capable of independent configuration and operation. - **5V Power Output on Pin 9:** Supplies 5V DC power through pin 9 of each DB9 connector, ideal for powering POS peripherals such as barcode scanners, receipt printers, or card readers. - **Low Profile PCIe Design:** Compact 92 × 69 mm form factor suitable for small form factor PCs, embedded systems, and rackmount servers. - **High-Performance Moschip MCS9904 Controller:** Each port is managed by a 16950A-compatible UART with 128-byte transmit and receive FIFOs, ensuring efficient data handling and reduced CPU load. - **Flexible Baud Rate Support:** Configurable baud rates from 50 bps up to 115,200 bps per port. - **Plug-and-Play Configuration:** I/O address, memory mapping, and IRQ assignments are automatically managed by the PCI BIOS, simplifying installation and avoiding resource conflicts. - **Comprehensive OS Support:** Compatible with Windows 2000, XP, Vista, Windows 7, and Linux distributions. - **Industrial-Grade Reliability:** Designed for continuous operation in industrial and commercial environments with wide temperature and humidity tolerance. - **Expandable Product Family:** Compatible with other Rayon PCIe serial cards (A102, A132, A112, A114, A134, A168, A134I, A124I) for scalable serial communication solutions.

Manufacturer: Rayon

Category: RS232 4-Ports

- **Four Independent RS232 Ports:** Provides four fully functional RS232 serial channels through RJ45 connectors, enabling simultaneous multi-device communication. - **PCI Plug & Play Interface:** Fully compliant with PCI Local Bus Specification Rev. 2.1, supporting automatic resource allocation (I/O address and IRQ) by the system BIOS. - **Intelligent Serial Controller:** Incorporates a 16C550A-compatible UART with 16-byte transmit and receive FIFOs, reducing CPU load and improving throughput. - **High-Speed Communication:** Supports baud rates up to 115.2 Kbps with a 1.8432 MHz crystal or up to 921.6 Kbps with a 14.7456 MHz crystal. - **Flexible Flow Control:** Supports both hardware (RTS/CTS) and software (Xon/Xoff) flow control. - **Universal PCI Compatibility:** Operates in both 5V and 3.3V PCI slots, ensuring compatibility with a wide range of PC architectures. - **Multi-OS Driver Support:** Compatible with Windows 95/98/Me, Windows NT, Windows 2000/XP, DOS, Linux, and SCO OpenServer. - **Expandable and Configurable:** Supports multiple card installations (up to two per system) with jumper-based card numbering for consistent COM port assignment. - **Industrial-Grade Reliability:** Designed for continuous operation in industrial environments with robust electrical design and optional isolation via external RS4232 converter boxes. - **RJ45 Connectivity:** Compact RJ45 connectors simplify cabling and integration in structured wiring environments.

Manufacturer: Rayon

Category: RS232 4-Ports

- **Multi‑Interface Support:** Provides four independent serial channels — three RS‑232 ports and one RS‑422 port — through RJ‑45 connectors. - **PCI Plug‑and‑Play Architecture:** Fully compliant with PCI Local Bus Specification Rev. 2.1. Automatic resource assignment (I/O address, IRQ) by BIOS; no manual configuration required. - **Intelligent Serial Controller:** Each port uses a 16C550A‑compatible UART with 16‑byte transmit and receive FIFOs, reducing CPU interrupts and improving throughput. - **High‑Speed Communication:** Supports baud rates up to 115.2 kbps (standard 1.8432 MHz crystal) or up to 921.6 kbps with optional 14.7456 MHz crystal. - **Flexible Flow Control:** Hardware (RTS/CTS) and software (XON/XOFF) flow control supported. - **Universal PCI Voltage Support:** Operates in both 5 V and 3.3 V PCI slots (Universal PCI design). - **Compact RJ‑45 Connectivity:** RJ‑45 connectors simplify cabling and allow modular connection to external devices or patch panels. - **Driver Support for Multiple OS:** Compatible with Windows 95/98/Me, Windows NT, Windows 2000/XP, DOS, Linux, and SCO OpenServer. - **IRQ Sharing Capability:** Supports interrupt sharing among multiple PCI cards, enabling multi‑card installations. - **Industrial Reliability:** Designed for continuous operation in PC/AT industrial systems; optional isolation and surge protection available via external RS4232 isolation boxes. - **Expandable System Integration:** Multiple PCIPORT cards can coexist in one system, supporting up to 8 or 16 serial ports depending on configuration.

Manufacturer: Rayon

Category: RS232 4-Ports

- **Four Independent Serial Ports:** Provides 4 communication channels — 2×RS‑422 and 2×RS‑232 — via RJ‑45 connectors. - **PCI Plug‑and‑Play Architecture:** Fully compliant with PCI Local Bus Specification Rev. 2.1. Automatic resource assignment (I/O address, IRQ) by PCI BIOS eliminates manual configuration. - **Intelligent Serial Controller:** Each port uses a 16C550A‑compatible UART with 16‑byte transmit and receive FIFOs, reducing CPU interrupt load and improving throughput. - **High‑Speed Operation:** Supports baud rates up to 115.2 kbps with a 1.8432 MHz crystal or up to 921.6 kbps with a 14.7456 MHz crystal. - **Flexible Interface Configuration:** Supports both RS‑232 and RS‑422 signaling standards. RS‑422 ports can be configured for full‑duplex differential communication. - **RJ‑45 Connector Interface:** Compact modular connectors simplify cabling and integration in structured wiring environments. - **Universal PCI Compatibility:** Operates in both 5 V and 3.3 V PCI slots at 33 MHz, suitable for legacy and modern PC/AT systems. - **Driver Support for Multiple Operating Systems:** Compatible with Windows 95/98/Me, Windows NT 4.0, Windows 2000/XP, DOS, Linux, and SCO OpenServer. - **Interrupt Sharing:** Supports IRQ sharing among multiple PCI cards, allowing installation of multiple PCIPORT cards in one system. - **Hardware Flow Control:** Supports both software (XON/XOFF) and hardware (RTS/CTS) flow control. - **Industrial‑Grade Reliability:** Designed for continuous operation in industrial and embedded environments with robust electrical design and optional isolation via external RS4232 boxes.

Manufacturer: Rayon

Category: RS232 4-Ports

- **Multi‑Interface Design:** Provides **3×RS‑422** and **1×RS‑232** serial ports via RJ45 connectors, supporting both balanced and unbalanced communication standards. - **PCI Plug‑and‑Play Architecture:** Fully compliant with **PCI Local Bus Specification Rev. 2.1**, supporting automatic resource assignment (I/O address, IRQ) by the system BIOS. No manual configuration required. - **High‑Performance Serial Controller:** Utilizes a **16C550A‑compatible UART** with **16‑byte transmit and receive FIFOs**, minimizing CPU interrupts and improving throughput. - **Flexible Baud Rate Support:** Software‑programmable baud rates up to **115.2 kbps** (with 1.8432 MHz crystal) or **921.6 kbps** (with 14.7456 MHz crystal). - **Hardware and Software Flow Control:** Supports **RTS/CTS** and **XON/XOFF** flow control for reliable data transmission. - **Universal PCI Voltage Support:** Operates in both **5 V and 3.3 V PCI slots** (Universal PCI design). - **Operating System Compatibility:** Drivers available for **Windows 95/98/Me/NT/2000/XP**, **DOS**, **Linux**, and **SCO OpenServer**. - **Industrial‑Grade Reliability:** Designed for continuous operation in PC/AT‑compatible systems, with robust electrical design and optional isolation via external RS4232 converter boxes. - **RJ45 Connector Interface:** Compact RJ45 connectors simplify cabling and reduce space requirements compared to DB‑type connectors.

Manufacturer: Rayon

Category: RS232 4-Ports

- **Dual Serial Port Interface:** Provides two DB9 male connectors for external serial communication, corresponding to two internal 10-pin COM headers (COM2 and COM3). - **Standard 2×10-Pin Flat Cable Connection:** Utilizes two 10-pin IDC connectors (2×5 layout per COM port) for direct connection to motherboard or controller serial headers. - **High Compatibility:** Designed to fit standard PC motherboards, embedded systems, and industrial controllers that support COM2 and COM3 ports. - **Durable Construction:** Made from high-quality metal bracket material with robust connectors to ensure long-term reliability and mechanical stability. - **Plug-and-Play Integration:** No additional drivers required; functions as a passive extension of existing serial ports. - **Universal DB9 Male Connectors:** Supports standard RS-232 pinout, compatible with a wide range of serial devices such as modems, PLCs, barcode scanners, and instrumentation interfaces. - **Compact and Standardized Form Factor:** Fits standard I/O expansion slots on desktop or industrial PC chassis. - **Color-Coded and Labeled Connectors:** Each DB9 port is typically labeled (COM2, COM3) for easy identification and installation. - **Flexible Cable Length:** Flat ribbon cables provide flexibility for routing within the chassis, minimizing strain and interference.

Manufacturer: JS Automation

Category: RS232 4-Ports

- **Four Independent Serial Ports:** Each port can be configured individually for RS422 or RS485 operation. - **DIP Switch Configuration:** Hardware DIP switches allow quick selection between RS422 and RS485 modes per port. - **ADDC (Auto Data Direction Control):** Built-in automatic data direction control for RS485 communication eliminates the need for manual RTS signal handling. - **High Compatibility:** Fully compatible with PCI Express bus architecture and Plug & Play configuration. - **Industrial-Grade Design:** Suitable for industrial control, automation, and data acquisition systems. - **Wide 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. - **High-Speed Communication:** Supports baud rates from 50 bps up to 115,200 bps per port. - **Flexible Connectivity:** Uses a DB37 female connector on the card, with included breakout cable to four DB9 male connectors. - **Compact PCIe Form Factor:** Standard PCIe bracket with compact PCB dimensions for easy integration. - **Extended Environmental Range:** Designed for reliable operation in industrial temperature and humidity conditions. - **128-Byte FIFO Buffers:** Each port includes 128-byte transmit and receive buffers to reduce CPU interrupts and improve throughput. - **Hardware Flow Control:** Supports Xon/Xoff and RTS/CTS flow control mechanisms. - **Upgradeable Product Line:** Compatible with other Rayon APCIe models for different port counts and interface combinations.

Manufacturer: Rayon

Category: RS485 / RS422 4-Po

- **Four Independent Serial Ports:** Provides four isolated serial communication ports, each configurable as RS422 or RS485. - **Full Ground Isolation:** Each port is galvanically isolated to prevent ground loops and protect connected equipment from electrical surges. - **Flexible Configuration:** DIP switch selectable interface mode per port (RS422 or RS485). - **Auto Data Direction Control (ADDC):** Built-in ADDC feature for RS485 mode enables automatic transmit/receive switching without software control. - **High-Speed Communication:** Supports baud rates from 50 bps up to 115,200 bps per port. - **Plug & Play PCIe Interface:** Fully compliant with PCI Express bus architecture; I/O, memory, and IRQ resources are automatically assigned by the PCI BIOS. - **Industrial-Grade Design:** Rugged construction and wide environmental tolerance make it suitable for industrial control and automation systems. - **Comprehensive OS Support:** Compatible with Windows 2000, XP, Vista, Windows 7, and Linux operating systems. - **Compact Form Factor:** Standard PCIe bracket with dimensions of 120 mm × 105 mm. - **Included Connectivity Cable:** Ships with a DB37 male to 4×DB9 male expansion cable for easy connection to external devices. - **Optional Accessories:** DB37 to 4×DB25 male cable (A400) available for alternative connector configurations. - **Enhanced System Performance:** 128-byte transmit and receive FIFO buffers per port reduce CPU interrupt load, improving multitasking efficiency. - **Industrial Reliability:** Designed for continuous operation in environments with high electrical noise and variable temperature/humidity conditions.

Manufacturer: Rayon

Category: RS485 / RS422 4-Po

- **Four Independent Serial Ports:** The CI-134 provides four RS-422/485 ports, allowing simultaneous communication with multiple serial devices. - **High-Speed Data Transmission:** Supports baud rates from 50 bps to 921,600 bps (921.6 kbps), ensuring compatibility with both legacy and modern serial devices. - **Auto Data Direction Switching:** Built-in automatic data direction control for RS-485 communication eliminates the need for manual RTS signal handling, simplifying software development and improving communication reliability. - **Flexible Interrupt Configuration:** Supports IRQ 2–5, 7, 10–12, and 15, allowing flexible resource allocation and minimizing conflicts with other system devices. - **Standard Interface Connectors:** Each port uses a male DB9 connector, ensuring compatibility with standard serial cables and accessories. - **Compact Form Factor:** The board measures 157 mm × 83 mm, suitable for installation in standard PC expansion slots. - **Industrial Reliability:** Designed for stable operation in industrial environments, with robust electrical design and high noise immunity. - **Wide Compatibility:** Compatible with a range of operating systems and industrial control software, supporting both RS-422 and RS-485 communication modes. - **Hardware Flow Control:** Supports hardware-based flow control for reliable data transmission in multi-drop or point-to-point configurations. - **Ease of Integration:** Ideal for connecting PLCs, sensors, controllers, and other serial devices to PC-based control systems.

Manufacturer: Moxa

Category: RS485 / RS422 4-Po

- **Four Independent Serial Ports:** Provides 4 isolated RS-422/485 ports for simultaneous multi-device communication. - **High-Speed Data Transmission:** Supports baud rates from 50 bps up to 921.6 kbps, enabling fast and reliable data exchange. - **2 kV Isolation Protection:** Each port is optically isolated up to 2,000 V, protecting the system from electrical surges, ground loops, and signal interference. - **ADDS (Automatic Data Direction Switching):** Built-in automatic data direction control for RS-485 communication eliminates the need for manual RTS signal handling, simplifying software development and ensuring efficient half-duplex communication. - **Flexible Interrupt Configuration:** Supports IRQ 2–5, 7, 10–12, and 15, allowing flexible resource allocation and compatibility with various PC architectures. - **Standard Interface Connectors:** Equipped with male DB9 connectors for each port, ensuring compatibility with standard serial cables and devices. - **Compact Form Factor:** The board measures 157 mm × 83 mm, suitable for installation in standard PC slots without occupying excessive space. - **Industrial Reliability:** Designed for continuous operation in demanding environments, with robust electrical isolation and stable performance under industrial conditions. - **Wide Compatibility:** Compatible with a broad range of operating systems and industrial applications requiring RS-422/485 communication.

Manufacturer: Moxa

Category: RS485 / RS422 4-Po

- **Four Isolated Serial Ports:** Provides 4 independent RS-422/485 ports for simultaneous multi-device communication. - **2 kV Isolation Protection:** Each port is optically isolated up to 2 kV, protecting connected devices and the host system from electrical surges, ground loops, and transient voltage spikes. - **Integrated Surge Protection:** Built-in surge suppression safeguards against voltage transients and electrostatic discharge (ESD), enhancing long-term reliability in industrial environments. - **High-Speed Data Transmission:** Supports baud rates from 50 bps up to 921.6 kbps, enabling fast and stable data exchange for high-throughput applications. - **Auto Data Direction Control:** Intelligent automatic data direction switching for RS-485 communication eliminates the need for manual RTS signal control, simplifying software development and ensuring efficient half-duplex communication. - **Flexible Interrupt Configuration:** Supports multiple IRQ settings (2–5, 7, 10–12, 15), allowing flexible resource allocation and compatibility with various PC architectures. - **Standard Interface Connectors:** Equipped with four male DB9 connectors for direct connection to serial devices. - **Compact Form Factor:** Designed with a compact PCB footprint (157 × 83 mm), suitable for installation in standard PC slots. - **Wide Compatibility:** Compatible with a broad range of operating systems and industrial communication protocols, making it ideal for integration into legacy and modern systems alike. - **Industrial-Grade Reliability:** Engineered for continuous operation in harsh industrial conditions, ensuring stable performance and long service life.

Manufacturer: Moxa

Category: RS485 / RS422 4-Po

- **Four Isolated Serial Ports:** Provides four independent RS422/RS485 communication channels, each electrically isolated to prevent ground loops and signal interference. - **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**, suitable for high-throughput industrial communication applications. - **Advanced UART Controller:** Equipped with a **16550-compatible UART** featuring a **128-byte FIFO buffer** per channel, minimizing CPU load and improving data handling efficiency. - **Channel-to-Channel Isolation:** Provides **1 kVDC isolation** between channels, enhancing system reliability and protecting connected devices from voltage surges and electrical noise. - **Compact Form Factor:** Designed with a **board size of 112 mm × 115 mm**, suitable for standard PCIe slots in industrial PCs and embedded systems. - **Single Connector Interface:** Utilizes a **DB37 female D-sub connector** for all four ports, simplifying installation and cable management. - **Included Breakout Cable:** Supplied with a **DB37 male to 4 × DB9 male cable (M27033709015)**, providing easy access to individual serial ports. - **Scalable Configuration:** Supports installation of up to **four COM-8564 boards per PC**, allowing expansion to 16 isolated serial ports in a single system. - **Bus-Powered Operation:** Draws **12 V DC power directly from the PCIe bus**, eliminating the need for external power supplies. - **Industrial-Grade Design:** Engineered for long-term reliability in automation, control, and data acquisition systems.

Manufacturer: JS Automation

Category: RS485 / RS422 4-Po

- **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