Comprehensive Product Summary: ADLINK PCI-7250 – PCI 8-Relay / 8-Isolated Digital Input Card

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### 1. Product Overview

Product Name: PCI-7250
Model: PCI-7250
Series: PCI-/cPCI-/LPCI-/LPCIe-725X Series
Article Number: PCI-7250
Manufacturer: ADLINK Technology Inc.
Product Type: PCI Bus Digital I/O Card with 8 Relay Outputs and 8 Isolated Digital Inputs
Form Factor: 32-bit, 5 V PCI Bus Interface

The ADLINK PCI-7250 is a high-performance digital I/O interface card designed for industrial automation, laboratory control, and general-purpose digital signal switching. It provides eight relay output channels and eight optically isolated digital input channels, with expansion capability through the PCI-7251 extension module. The card is part of ADLINK’s NuDAQ family of PCI-based data acquisition and control products.

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### 2. Key Features

- 8-Channel Relay Outputs:
Provides four SPDT (Form C) and four SPST (Form A) relays for flexible control of external devices.

- 8-Channel Isolated Digital Inputs:
Optically isolated, non-polarity digital inputs with optional RC filtering for noise immunity.

- Expandable Architecture:
Supports up to three PCI-7251 extension modules, expanding total capacity to 32 relay outputs and 32 isolated inputs.

- High Isolation and Reliability:
5000 VRMS isolation voltage between channels and system; robust against industrial noise.

- LED Status Indicators:
Onboard LEDs display the ON/OFF state of each relay output for easy monitoring.

- Programmable I/O Operation:
Supports programmed I/O data transfer for both input and output channels.

- Non-Latching Relays:
Ensures predictable relay state after power-up or reset.

- Software and OS Compatibility:
Supports Windows (XP/Vista/7/2000/2003 Server) and Linux with ADLINK’s PCIS-DASK and DAQPilot drivers.

- Comprehensive Software Support:
Compatible with LabVIEW™, MATLAB®, DAQBench, and ADLINK’s DAQMaster configuration utility.

- Industrial-Grade Design:
Designed for reliable operation in harsh environments with wide temperature and humidity tolerance.

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### 3. Technical Specifications

Relay Output:
- Channels: 8
- Relay Type:
- Channels 0–3: SPDT (Form C)
- Channels 4–7: SPST (Form A)
- Contact Rating:
- AC: 120 V @ 0.5 A
- DC: 24 V @ 1 A
- Breakdown Voltage: 1000 VRMS
- Contact Resistance: 100 mΩ max
- Operate Time: 8 ms
- Release Time: 8 ms
- Expected Life:
- >5×10⁵ operations @ 1 A, 24 VDC
- >2×10⁵ operations @ 0.5 A, 120 VAC
- LED Indicators: One per relay channel
- Data Transfer: Programmed I/O

Isolated Digital Input:
- Channels: 8
- Input Range: 0–24 V, non-polarity
- Input High Voltage: 5–24 V
- Input Low Voltage: 0–1.5 V
- Input Resistance: 2.2 kΩ @ 0.33 W
- Isolation Voltage: 5000 VRMS
- Data Transfer: Programmed I/O

General:
- I/O Connector: 37-pin D-sub female
- Power Requirements: +5 V @ 140 mA typical
- Dimensions: 162 mm × 107 mm (excluding connectors)
- Operating Temperature: 0 °C to 60 °C
- Storage Temperature: -20 °C to 80 °C
- Relative Humidity: 5%–95%, non-condensing

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### 4. Functionality

The PCI-7250 integrates relay actuation and isolated digital input collection into a single PCI card. Each relay output can switch external devices such as solenoids, lamps, or contactors. The isolated inputs detect external logic or contact closures, providing galvanic isolation from system ground.

Operation Principle:
- Relay Outputs: Controlled via software registers; each bit corresponds to a relay channel. A logic “1” energizes the relay (closing NO contact), while “0” de-energizes it.
- Isolated Inputs: Each input channel uses an opto-isolator (PC-814) to detect voltage presence. Inputs can be configured for AC-filtered or DC (non-filtered) operation via onboard jumpers (JP1–JP8).

Use Cases:
- Industrial ON/OFF control
- External relay driving and signal switching
- Limit switch monitoring
- Laboratory automation and test systems
- Integration with A/D and D/A cards for complete DAQ systems

Compatibility:
- PCI-compliant systems (32-bit, 5 V bus)
- Expansion via PCI-7251 modules for additional I/O capacity

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### 5. Components & Accessories

Included Items:
- PCI-7250 card
- ADLINK software CD
- User’s manual and installation guide

Optional Accessories:
- DIN-37D-01: Terminal board with 37-pin D-sub connector and DIN-rail mounting
- ACLD-9137-01: General-purpose terminal board with 37-pin D-sub male connector
- ACL-10137-1MM: 37-pin D-sub male/male cable, 1 m length

Extension Modules:
- PCI-7251: 8-CH Relay Output & 8-CH Isolated DI Extension Card (connects to PCI-7250)

Connectors:
- 37-pin D-sub female connector for I/O interface
- Pin assignments include NO, NC, COM for relays and DI_H/DI_L for inputs

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### 6. Installation & Setup

System Requirements:
- Available 32-bit PCI slot (5 V signaling)
- Compatible operating system (Windows or Linux)
- Administrative privileges for driver installation

Installation Steps:
1. Power off the host computer and disconnect peripherals.
2. Insert the PCI-7250 into an available PCI slot.
3. Secure the card and reconnect system power.
4. Install ADLINK’s PCIS-DASK or DAQPilot driver package.
5. Configure device settings using DAQMaster or system Device Manager.

Jumper Configuration:
- JP1–JP8 select AC-filtered or non-filtered input mode per channel:
- Pins 2–3: Non-AC-filter (default)
- Pins 1–2: AC-filter enabled

Expansion Setup:
- Up to three PCI-7251 modules can be connected to one PCI-7250 via ribbon cables, expanding total I/O to 32 relays and 32 isolated inputs.

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### 7. Performance & Capabilities

- Relay Switching Speed: 8 ms operate / 8 ms release
- Input Response: Opto-isolated, suitable for 5–24 V logic levels
- Isolation Strength: 5000 VRMS channel-to-system
- Power Consumption: +5 V @ 140 mA typical (no relays energized)
- Reliability: Mechanical endurance exceeding 500,000 operations under rated load
- Noise Immunity: Opto-isolation and optional RC filtering ensure stable operation in electrically noisy environments
- Scalability: Modular expansion up to 32 relay outputs and 32 isolated inputs

Limitations:
- Relays are non-latching; state resets on power cycle.
- Contact ratings limited to 0.5 A @ 120 VAC or 1 A @ 24 VDC; external protection recommended for inductive loads.

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### 8. Standards & Compliance

- Bus Interface: PCI Local Bus Specification, Revision 2.2 compliant
- Form Factor: Full-length PCI card (162 × 107 mm)
- Isolation: 5000 VRMS (channel-to-system)
- Safety & EMC: Designed for industrial environments; compliant with CE and FCC Class A standards (per ADLINK product line norms)
- CompactPCI Compatibility: Related model cPCI-7252 conforms to PICMG 2.0 R2.1
- Environmental Compliance: RoHS-compliant manufacturing

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### 9. Additional Information

Warranty & Support:
- Standard ADLINK limited warranty (typically 2 years; refer to manufacturer policy)
- Technical support via ADLINK global service network
- Contact:
- Website: [www.adlinktech.com](http://www.adlinktech.com)
- Email: service@adlinktech.com
- Phone: +886-2-82265877

Maintenance:
- No user-serviceable components; avoid static discharge during handling.
- Periodically inspect connectors and cabling for wear.
- Use anti-static precautions during installation or removal.

Software & Driver Updates:
- Windows Drivers: DAQPilot (recommended), PCIS-DASK (legacy)
- Linux Drivers: PCIS-DASK/X
- Third-Party Integration:
- MATLAB® via DAQ-MTLB adapter
- LabVIEW™ via DAQ-LVIEW PnP VIs
- Agilent VEE™ via PCIS-VEE driver
- ActiveX/SCADA via DAQBench

Supported Development Environments:
- VB.NET, VC++, C#, Delphi, Borland C++ Builder
- MATLAB®, LabVIEW™, Agilent VEE™

Software Tools:
- DAQMaster: Configuration-based device manager
- DAQPilot: Unified driver and SDK for all ADLINK DAQ products
- DAQBench: ActiveX control suite for SCADA/HMI
- DAQCreator: Data acquisition and logging software

Documentation & Revision:
- User’s Manual: Rev. 2.03 (June 24, 2008)
- Part No.: 50-11038-1000
- Specifications subject to change without notice

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### Summary

The ADLINK PCI-7250 is a robust, industrial-grade PCI digital I/O card combining eight relay outputs and eight optically isolated digital inputs. It is engineered for reliable ON/OFF control, signal switching, and digital monitoring in automation and laboratory environments. With modular expansion via PCI-7251 cards, it scales up to 32 relay and 32 input channels. The card’s 5000 VRMS isolation, LED status indicators, and flexible input filtering make it ideal for noisy industrial settings. Comprehensive driver and software support across Windows and Linux platforms ensures seamless integration into diverse control and data acquisition systems.

In essence, the PCI-7250 delivers a balanced combination of electrical isolation, mechanical reliability, and software versatility, making it a cornerstone component for industrial control and digital interfacing applications.