Comprehensive Product Summary: ADLINK cPCI‑7452 Isolated Digital I/O Card

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### 1. Product Overview

Product Name: cPCI‑7452
Model: cPCI‑7452
Series: NuDAQ CompactPCI Digital I/O Series
Article Number: 50‑15053‑1000
Manufacturer: ADLINK Technology Inc.
Product Type: 256‑Channel Isolated Digital Input/Output Card (128 DI + 128 DO)
Form Factor: 6U Eurocard, CompactPCI compliant (PICMG 2.0 R3.0)
Bus Interface: 32‑bit CompactPCI Bus, Plug‑and‑Play architecture

The ADLINK cPCI‑7452 is a high‑density, opto‑isolated digital I/O card designed for industrial automation, machine control, and laboratory data acquisition. It integrates 128 isolated digital input channels and 128 isolated digital output channels, providing robust 2500 V RMS isolation protection between channels and system. The card is engineered for high reliability in electrically noisy environments and supports both Windows and Linux operating systems with comprehensive driver and software support.

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### 2. Key Features

- High‑Density I/O:
256 total channels — 128 isolated digital inputs and 128 isolated digital outputs.

- Electrical Isolation:
2500 V RMS channel‑to‑system isolation ensures protection against voltage surges and ground loops.

- Wide Input Range:
Non‑polarity digital input range up to 28 V DC, allowing flexible interfacing with various sensors and switches.

- Wide Output Range:
Open‑collector Darlington transistor outputs supporting 5 V to 35 V DC external supply, suitable for driving relays, solenoids, and indicators.

- High Sink Current Capability:
Up to 300 mA per channel continuous sink current at 100 % duty cycle.

- Change‑of‑State (COS) Interrupts:
Programmable COS detection on all 128 input channels for event‑driven data acquisition.

- Output Readback:
Real‑time digital output status readback for verification and diagnostics.

- Watchdog Timer:
Onboard 32‑bit watchdog timer with programmable overflow interval (1 s – 4500 s) to ensure system reliability.

- Board ID Function:
DIP‑switch selectable board identification (0–15) for multi‑card systems.

- Software & Driver Support:
- Operating Systems: Windows 7/Vista/XP/2000/2003 Server, Linux, Windows CE (on request).
- Drivers: PCIS‑DASK (Windows), PCIS‑DASK/X (Linux), DAQPilot (Windows/LabVIEW), DAQ‑MTLB (MATLAB).
- Development Tools: VB.NET, VC.NET, Delphi, BCB, DAQBench, AD‑Logger.

- CompactPCI Compliance:
Fully compliant with PICMG 2.0 R3.0 standard for mechanical and electrical interoperability.

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### 3. Technical Specifications

Physical Characteristics
- Form Factor: 6U Eurocard (CompactPCI)
- Dimensions: 233.35 mm (L) × 160 mm (W) (excluding connectors)
- Weight: Approx. 0.8 kg (typical)
- I/O Connectors: Two 200‑pin dual‑port VHDCI female connectors
- Mounting: Front‑panel CompactPCI slot insertion

Electrical Characteristics
- Bus Interface: 32‑bit CompactPCI, 33 MHz
- Power Requirements:
- +3.3 V @ 300 mA (typical)
- +5 V @ 1.26 A (typical)
- Isolation Voltage: 2500 V RMS channel‑to‑system
- Internal +5 V Isolated Supply: 100 mA max (@ 40 °C)

Environmental Conditions
- Operating Temperature: 0 °C – 60 °C
- Storage Temperature: −20 °C – 80 °C
- Relative Humidity: 5 % – 95 %, non‑condensing

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### 4. Functionality

Operating Principle:
The cPCI‑7452 provides optically isolated digital input and output channels. Each input channel uses a photo‑coupler (PC‑3H4) to isolate external signals from the system bus, ensuring noise immunity and protection from voltage transients. The outputs employ open‑collector Darlington transistor arrays (ULN2803A) for high‑current sinking capability.

Digital Inputs (DI):
- 128 opto‑isolated channels, non‑polarity.
- Input voltage range: 0 – 28 V DC.
- Logic thresholds:
- Logic 1 (High): 5 – 28 V
- Logic 0 (Low): 0 – 1.5 V
- Input resistance: 2.4 kΩ @ 0.5 W.
- Typical input current: 10 mA/channel.
- ESD protection: Forward‑direction protection circuit.
- COS interrupt capability on all channels.

Digital Outputs (DO):
- 128 opto‑isolated open‑collector outputs.
- Output voltage range: 5 – 35 V DC.
- Output type: Darlington transistor (sink type).
- Sink current: 300 mA per channel @ 100 % duty.
- Isolation: 2500 V RMS channel‑to‑system.
- Output readback supported.

Change‑of‑State (COS) Detection:
Each input channel can generate an interrupt when its logic state changes. COS detection is implemented in four 32‑bit banks, each monitored by a CPLD. The COS latch registers capture the input state at the moment of change, allowing event‑driven processing without continuous polling.

Watchdog Timer (WDT):
A 32‑bit programmable timer monitors system activity. If not reset within the programmed interval (1 – 4500 s), it triggers an interrupt, enabling recovery or safety shutdown procedures.

Use Cases & Applications:
- Industrial automation and process control
- Machine ON/OFF control and relay driving
- Signal monitoring and switching
- Laboratory instrumentation and data acquisition
- Safety‑critical systems requiring watchdog supervision

Compatibility:
Compatible with CompactPCI backplanes and standard industrial I/O terminal boards. Supports integration with ADLINK’s DAQ software suite and third‑party environments such as LabVIEW® and MATLAB®.

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### 5. Components & Accessories

Included Items:
- cPCI‑7452 Isolated Digital I/O Card
- User’s Manual and Software CD (drivers, libraries, documentation)

Optional Accessories:
- DIN‑100S‑01: Terminal board with one 100‑pin SCSI‑II connector and DIN‑rail mounting (cables not included).
- ACL‑102150 / ACL‑102150‑1: 1 m SCSI‑100 to Mini SCSI‑100 cable for cPCI‑7452 connection.
- Additional mating cables and terminal boards available (refer to ADLINK accessory catalog).

Connectors:
- Two 200‑pin VHDCI female connectors (CN1 for DO, CN2 for DI).
- Each connector provides 128 channels divided into 16 common groups (COM1–COM16 for DI, VDD/IGND for DO).
- Pin assignments are fully documented for custom cable fabrication.

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### 6. Installation & Setup

System Requirements:
- CompactPCI chassis with available 6U slot.
- +3.3 V and +5 V power rails per PICMG 2.0 R3.0.
- Supported OS: Windows or Linux with ADLINK drivers.

Installation Procedure:
1. Power off the CompactPCI system.
2. Insert the cPCI‑7452 into an available 6U slot.
3. Secure the card using front‑panel screws.
4. Connect external I/O via VHDCI cables to terminal boards.
5. Power on the system; the BIOS automatically assigns resources (Plug‑and‑Play).
6. Install ADLINK’s driver package (PCIS‑DASK or DAQPilot).
7. Verify operation using AD‑Logger or DAQBench utilities.

Board ID Configuration:
A 4‑bit DIP switch (S1) allows assignment of board IDs 0–15 for multi‑card systems. Each combination of switch positions corresponds to a unique ID, simplifying software addressing.

Mounting Options:
DIN‑rail terminal boards (DIN‑100S‑01) provide convenient field wiring. The card itself mounts directly in the CompactPCI backplane.

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### 7. Performance & Capabilities

Input Performance:
- Sampling rate determined by system I/O speed (programmed I/O).
- COS detection sampling clock: 16.5 MHz (minimum pulse width > 61 ns).
- Reliable operation in high‑noise environments due to optical isolation and input filtering (1.5 ms time constant).

Output Performance:
- Fast switching via Darlington transistor arrays.
- Capable of driving inductive loads (relays, solenoids) with external fly‑wheel diode protection.
- Supports simultaneous operation of all 128 outputs with derated current (20 % duty for full load).

Efficiency & Reliability:
- Low power consumption (approx. 7 W typical).
- High MTBF due to solid‑state isolation and industrial‑grade components.
- Watchdog timer ensures system recovery from software or hardware faults.

Limitations:
- Programmed I/O only (no DMA).
- Output channels are sink‑type only (no source drive).
- External power supply required for output loads above 5 V.

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### 8. Standards & Compliance

- CompactPCI Standard: PICMG 2.0 R3.0 compliant.
- Electrical Isolation: 2500 V RMS channel‑to‑system verified.
- ESD Protection: Integrated protection circuitry on all input channels.
- RoHS Compliance: Conforms to environmental directives (lead‑free manufacturing).
- Safety & EMC: Designed for industrial environments; meets CE and FCC Class A requirements (typical for ADLINK industrial I/O).
- Software Standards: Compatible with NI LabVIEW®, MATLAB®, and standard Windows/Linux APIs.

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### 9. Additional Information

Warranty:
- Standard limited two‑year warranty (one year in China).
- Covers defects in materials and workmanship from date of shipment.
- Excludes damage from misuse, improper installation, or unauthorized repair.
- RMA service available via ADLINK’s online portal: [rma.adlinktech.com/policy](http://rma.adlinktech.com/policy).

Technical Support:
- Email: service@adlinktech.com
- Phone: +886‑2‑82265877
- Fax: +886‑2‑82265717
- Website: [www.adlinktech.com](http://www.adlinktech.com)
- Address: 9F, No. 166, Jian Yi Road, Chungho City, Taipei 235, Taiwan

Maintenance:
- Handle only in ESD‑safe environments.
- Avoid exposure to high humidity or corrosive atmospheres.
- Periodically inspect connectors and cables for wear.
- Firmware and driver updates available from ADLINK’s support site.

Software Updates & Libraries:
- ADLINK provides continuous updates for PCIS‑DASK and DAQPilot libraries.
- Example source code and demo programs (C/C++, LabVIEW, MATLAB) included on installation media.
- ActiveX controls (DAQBench™) available for rapid application development in VB/VC++.

Documentation:
- User’s Manual Rev. 2.01 (Dec 21 2006)
- Comprehensive register map and programming reference for low‑level control.
- Example applications for COS interrupt handling, watchdog timer configuration, and digital I/O operations.

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### Summary

The ADLINK cPCI‑7452 is a robust, high‑channel‑density isolated digital I/O solution for CompactPCI systems. With 128 opto‑isolated inputs and 128 opto‑isolated outputs, it provides exceptional flexibility for industrial automation, process control, and data acquisition tasks. Its 2500 V RMS isolation, wide voltage ranges, and programmable COS interrupts make it ideal for interfacing with diverse industrial signals. Comprehensive software support, including Windows and Linux drivers, LabVIEW® and MATLAB® integration, and ActiveX controls, ensures seamless deployment in both legacy and modern control systems. The inclusion of a watchdog timer, board ID configuration, and output readback further enhances reliability and manageability in mission‑critical environments.

In summary, the cPCI‑7452 delivers high‑density, high‑reliability, and high‑isolation digital I/O performance in a CompactPCI form factor, backed by ADLINK’s industrial‑grade engineering and global support infrastructure.