Comprehensive Product Summary: ADLINK cPCI-3538/25 CompactPCI 8-Port RS-232 Serial Communication Module

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### 1. Product Overview

Product Name: cPCI-3538/25
Model Number: cPCI-3538/25
Series: cPCI-3534 / cPCI-3538 CompactPCI Serial Communication Modules
Article Number: cPCI-3538/25
Manufacturer: ADLINK Technology Inc.
Manufacturer Address: 9F, No. 166, Jian Yi Road, Chungho City, Taipei 235, Taiwan, R.O.C.
Website: [www.adlink.com.tw](http://www.adlink.com.tw)
Contact: service@adlink.com.tw | Tel: +886-2-82265877 | Fax: +886-2-82265717

The ADLINK cPCI-3538/25 is a high-performance, 32-bit CompactPCI serial communication module designed to provide eight independent RS-232 communication ports through a single CompactPCI slot. It is part of ADLINK’s cPCI-353x series, which includes the 4-port cPCI-3534 and the 8-port cPCI-3538 models. The cPCI-3538/25 supports plug-and-play configuration, automatic resource assignment, and optional isolation via external expansion boxes, making it ideal for industrial automation, data acquisition, and telecommunication applications.

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### 2. Key Features

- Eight Independent Serial Ports: Provides 8 fully independent RS-232C compatible communication channels.
- CompactPCI 32-bit Interface: Fully compliant with CompactPCI Specification Rev. 2.1, ensuring compatibility with standard cPCI backplanes.
- Plug-and-Play Configuration: Automatic IRQ and I/O address assignment by PCI BIOS; no manual configuration required.
- High-Speed Communication: Supports baud rates from 50 bps up to 115,200 bps per port.
- Optional Isolation and Multi-Protocol Support: Expandable to isolated RS-232/422/485 interfaces using the optional C588XB external box.
- Intelligent Buffering: Each port includes FIFO buffering to reduce CPU interrupt frequency and improve system throughput.
- Surge Protection: Built-in surge protection on all communication lines for enhanced reliability in industrial environments.
- Operating System Support: Compatible with DOS, Windows 3.1, Windows 95/98, Windows NT, Linux, and SCO OpenServer.
- Scalable System Integration: Supports up to two cards per system, providing a maximum of 16 serial ports.
- Rear I/O Support: Optional R-3538 rear I/O transition board for backplane connectivity.
- Compact Form Factor: 3U Eurocard size (160 mm × 100 mm), suitable for embedded and industrial systems.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|------------------|
| Bus Interface | 32-bit CompactPCI, compliant with PCI Specification Rev. 2.1 |
| Serial Controller | 16C550A compatible UART |
| Clock Frequency | 1.8432 MHz to 7.3728 MHz |
| Communication Ports | 8 independent RS-232C ports |
| Optional Expansion | C588XB external box for 8 isolated RS-232/422/485 ports |
| Maximum System Ports | 16 ports (2 cards per system) |
| Baud Rate Range | 50 to 115,200 bps per port |
| Flow Control | Hardware (RTS/CTS) and Software (Xon/Xoff) |
| Connector Type | DB62 female connector on card |
| External Cable | DB62-to-8×DB25 male cable (included) |
| Isolation (optional) | 500 VDC isolation via C588XB |
| Operating Temperature | 0°C to 55°C |
| Storage Temperature | -20°C to 65°C |
| Humidity | 10% to 95%, non-condensing |
| Dimensions | 160 mm (L) × 100 mm (W) × 3U height |
| Power Consumption | +5 VDC @ 1400 mA (typical) |
| Surge Protection | Yes |
| Weight | Approx. 200 g (module only) |

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### 4. Functionality

The cPCI-3538/25 functions as a multiport serial communication interface for CompactPCI-based systems. It provides eight asynchronous RS-232 ports that can be used for connecting modems, terminals, data acquisition devices, or other serial peripherals. Each port operates independently, allowing simultaneous communication with multiple devices.

The card uses an ASIC-based PCI controller that fully implements the PCI Local Bus Specification Rev. 2.1. All resource assignments, including base memory address and interrupt lines, are automatically managed by the system BIOS, eliminating manual configuration. The intelligent buffering mechanism minimizes CPU interrupts by handling data transmission and reception through FIFO buffers.

Use Cases and Applications:
- Industrial automation and control systems
- Data acquisition and monitoring
- Telecommunication and networking equipment
- Modem banks and terminal servers
- Laboratory instrumentation and test systems
- Embedded computing platforms requiring multiple serial interfaces

Compatibility:
- Operating Systems: DOS, Windows 3.1, Windows 95/98, Windows NT, Linux, SCO OpenServer
- Hardware: Compatible with CompactPCI backplanes and systems supporting 32-bit PCI signaling

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### 5. Components & Accessories

Included Items:
- cPCI-3538/25 Serial Communication Module
- DB62-to-8×DB25 male expansion cable
- R-3538 Rear I/O Daughter Board (for rear I/O version)
- ADLINK “All-in-One” Software CD or driver disks
- User Manual and documentation

Optional Accessories:
- C588XB Expansion Box: Provides 8 isolated RS-232/422/485 ports with 500 VDC isolation.
- DB62-to-DB62 Cable: For connecting the cPCI-3538 to the C588XB isolation box.
- R-3538 Rear I/O Transition Board: Enables rear-panel connectivity for CompactPCI chassis.

Connectors:
- Front I/O: DB62 female connector
- External Cable: 8×DB25 male connectors for RS-232 ports
- Rear I/O (optional): DB62 connector via R-3538 board

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### 6. Installation & Setup

System Requirements:
- CompactPCI chassis with available 32-bit slot
- +5 VDC power supply capable of providing at least 1.4 A per card
- Supported operating system (Windows NT/95/98, DOS, Linux, SCO OpenServer)

Installation Procedure:
1. Power off the system and all connected peripherals.
2. Discharge static electricity using a grounded wrist strap.
3. Insert the cPCI-3538 module into an available CompactPCI slot.
4. Secure the module using the chassis mounting screws.
5. Connect the DB62-to-8×DB25 cable to the front panel connector.
6. Attach serial devices to the DB25 connectors.
7. Power on the system; the BIOS will automatically assign resources.
8. Install the appropriate driver software from the ADLINK CD.

Software Installation:
- Windows NT: Use the Control Panel → Network → Add Adapter → “Other” option, and specify the driver path (e.g., X:\NuCOM\CPCI3538\NT4).
- Windows 95/98: The system’s Plug-and-Play feature detects the card automatically; follow the on-screen prompts to install drivers.
- Linux/SCO: Supported via standard serial driver configuration or ADLINK-provided drivers.

Configuration Notes:
- Up to two cPCI-3538 cards can be installed in one system.
- Use jumper JP1 to designate the first or second card (ON for first, OFF for second).
- Ensure COM port numbers do not overlap between cards.
- IRQ sharing is supported under PCI Plug-and-Play.

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### 7. Performance & Capabilities

Data Throughput:
Each port supports up to 115.2 Kbps, with total system throughput scaling linearly across ports. The intelligent buffering and FIFO architecture reduce CPU load, enabling efficient multiport communication.

Capacity:
- 8 ports per card
- Up to 16 ports per system (2 cards)

Efficiency:
- Reduced CPU interrupt frequency due to buffered UARTs
- Automatic resource allocation via PCI BIOS
- Shared IRQ support for multi-card systems

Limitations:
- Maximum of two identical cards per system
- RS-232 interface only (RS-422/485 requires optional C588XB)
- Operating temperature limited to 55°C

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### 8. Standards & Compliance

- CompactPCI Specification: Revision 2.1 compliant
- PCI Local Bus Specification: Revision 2.1 compliant
- Electrical Isolation (optional): 500 VDC via C588XB
- Surge Protection: Integrated on all communication lines
- Environmental Compliance: Designed for industrial temperature and humidity ranges
- Software Compatibility:
- DOS
- Windows 3.1 / 95 / 98 / NT
- Linux
- SCO OpenServer

Regulatory and Safety:
- Designed to meet industrial EMC and safety standards applicable to CompactPCI modules.
- ADLINK maintains ISO-certified manufacturing processes ensuring product reliability and quality.

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### 9. Additional Information

Warranty:
ADLINK provides a one-year limited warranty from the date of purchase, covering defects in materials and workmanship. The warranty excludes damage caused by misuse, unauthorized modification, or operation beyond specified limits. Proof of purchase is required for warranty service.

Support & Service:
- Technical Support: nudaq@adlink.com.tw
- Software Support: sw@adlink.com.tw
- Product Line Support:
- NuDAQ, NuDAM, NuIPC, NuPRO, AMB product families supported via dedicated email channels.
- Customer Service: service@adlink.com.tw

Maintenance:
- Handle modules using anti-static precautions.
- Avoid exposure to moisture or extreme temperatures.
- Ensure proper grounding of connected equipment to prevent electrical damage.

Firmware & Driver Updates:
ADLINK periodically releases updated drivers and utilities for improved performance and OS compatibility. Updates are available via the ADLINK website.

Return & Repair Policy:
Defective units must be returned postage-prepaid and securely packaged. Out-of-warranty repairs are subject to parts and labor charges.

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### Summary

The ADLINK cPCI-3538/25 is a robust, high-performance CompactPCI serial communication module offering eight independent RS-232 ports with optional isolation and multi-protocol support. Designed for industrial and embedded applications, it provides reliable, high-speed serial connectivity with minimal CPU overhead. Its plug-and-play PCI architecture, broad OS compatibility, and modular expansion options make it an ideal solution for system integrators and OEMs requiring scalable serial communication in CompactPCI environments.

With its combination of intelligent buffering, surge protection, and optional isolation, the cPCI-3538/25 delivers industrial-grade reliability and flexibility for demanding communication tasks across automation, data acquisition, and telecommunication systems.