Comprehensive Product Summary: OPT 8DI8DO‑4000 Isolated 8/8 DIO Module for Nuvo‑4000 Series

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### 1. Product Overview

Product Name: OPT 8DI8DO‑4000
Article Number: OPT 8DI8DO‑4000
Model Type: Isolated 8 Digital Inputs / 8 Digital Outputs Module
Series: Nuvo‑4000 Series Fanless Box‑PC Expansion Option
Manufacturer: Neousys Technology Inc.
Associated Systems: Nuvo‑4022 and Nuvo‑4040 Fanless Box‑PCs

The OPT 8DI8DO‑4000 is an optional isolated digital I/O module designed for integration with Neousys Nuvo‑4000 series industrial controllers. It adds 8 channels of isolated digital input and 8 channels of isolated digital output to the system, providing robust signal isolation and change‑of‑state (COS) interrupt capabilities for industrial automation, machine control, and data acquisition applications. The module interfaces through an on‑board 2×13‑pin header and is available with a panel/cable kit for front‑panel access via a D‑Sub 25 connector.

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### 2. Key Features

- 8 Isolated Digital Inputs + 8 Isolated Digital Outputs: Provides a balanced I/O configuration for monitoring and control tasks.
- High Isolation Protection: 2500 Vrms galvanic isolation between system and field signals for both DI and DO channels.
- Wide Input Voltage Range: Accepts logic high signals from 5 V to 24 V and logic low from 0 V to 1.5 V, compatible with most industrial sensors and controllers.
- Robust Output Design: Each DO channel uses a Power MOSFET driver with Analog Devices iCoupler® isolation technology, supporting 100 mA continuous and 250 mA peak sink current.
- Change‑of‑State (COS) Interrupt Support: Generates interrupts on input state changes for event‑driven applications.
- Software Library and API Support: Includes Neousys WDT_DIO library for Windows XP, Vista, and 7 (32/64‑bit) with functions for polling, COS interrupts, and watchdog integration.
- Rugged Industrial Design: Engineered for use in harsh environments with ‑25 °C to 60 °C operating range when installed in Nuvo‑4000 systems.
- Plug‑and‑Play Integration: Factory‑option module recognized by the Nuvo‑4000 BIOS and driver suite.
- Front‑Panel Accessibility: Optional D‑Sub 25 connector kit for easy field wiring and maintenance.

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### 3. Technical Specifications

Isolated Digital Inputs (DI):
- Channels: 8 isolated inputs
- Logic High: 5 V to 24 V DC
- Logic Low: 0 V to 1.5 V DC
- Input Resistance: 2.4 kΩ
- Isolation Voltage: 2500 Vrms channel‑to‑system

Isolated Digital Outputs (DO):
- Channels: 8 isolated outputs
- Output Type: Power MOSFET with Analog Devices iCoupler® isolation
- Sink Current (per channel): 100 mA continuous, 250 mA peak
- Isolation Voltage: 2500 Vrms
- Output Configuration: Normally open (sinking type)

Electrical Characteristics:
- Isolation Power Supply: 5 V isolated rail provided internally
- Connector Type: 2×13 pin box header on main board; optional D‑Sub 25 female for front panel
- Signal Grounds: Separate DI_GND and DO_GND pins for each group

Mechanical and Environmental:
- Integration: Internal to Nuvo‑4000 chassis
- Operating Temperature: ‑25 °C to 60 °C (when installed in Nuvo‑4000)
- Storage Temperature: ‑40 °C to 85 °C
- Humidity: 10 % to 90 %, non‑condensing
- Vibration/Shock: Compliant with IEC 60068‑2‑64 and ‑27 standards when installed with SSD

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### 4. Functionality

The OPT 8DI8DO‑4000 module extends the Nuvo‑4000 controller’s I/O capabilities by providing isolated digital interfaces for industrial signal control. Each input channel detects voltage levels from external devices such as sensors, switches, or relays, while each output channel can sink current to drive actuators, indicators, or relays. The isolation barrier protects the controller from ground loops and transient surges.

Use Cases and Applications:
- Industrial automation and machine control systems
- Test and measurement equipment requiring digital trigger inputs and outputs
- Data acquisition and monitoring systems
- Remote I/O control in factory environments
- Event‑driven applications using COS interrupts for real‑time response

Compatibility:
- Fully compatible with Nuvo‑4022 and Nuvo‑4040 models
- Supported by Neousys WDT_DIO software library and drivers
- Integrates with Windows XP, Vista, and 7 (32/64‑bit) operating systems

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### 5. Components & Accessories

Included Items:
- OPT 8DI8DO‑4000 isolated DIO module (pre‑installed or factory option)
- 2×13 pin internal box header for signal connection
- Flat cable and D‑Sub 25 connector kit (for front‑panel access)

Optional Accessories for Nuvo‑4000 Series:
- DINRAIL‑E: DIN‑rail mounting assembly
- Fan‑80: 80×80×15 mm smart fan assembly for enhanced cooling
- PA‑120W: 120 W AC/DC adapter (12 V/8.5 A, ‑30 °C to 70 °C operation)
- PA‑160W: 160 W AC/DC adapter (20 V/8 A)

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### 6. Installation & Setup

Hardware Integration:
The module is mounted on the Nuvo‑4000 main board via the dedicated 2×13 pin header. A flat ribbon cable connects to the front‑panel D‑Sub 25 connector for external wiring. Each pin is clearly defined for DI and DO signals, grounds, and isolation power.

Pin Assignments (Internal Header):
- Pins 1–12: DO channels and grounds
- Pins 13–25: DI channels and grounds
- Pin 2: Isolation 5 V supply

Software Setup:
1. Install the Neousys WDT_DIO driver package (WDT_DIO_Setup.exe).
2. Reboot the system to activate the library.
3. Use the provided API functions to initialize and control DIO operations.

Programming Interface:
- Initialization: `InitDIO()`
- Read Input: `DIReadLine()` or `DIReadPort()`
- Write Output: `DOWriteLine()` or `DOWritePort()`
- COS Interrupt Setup: `SetupDICOS()`, `RegisterCallbackDICOS()`, `StartDICOS()`, `StopDICOS()`

Mounting Options (for Nuvo‑4000 System):
- Standard wall‑mount brackets (included)
- Optional DIN‑rail mount kit for cabinet installation

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### 7. Performance & Capabilities

Input Performance:
- Fast response to voltage transitions within logic thresholds
- High noise immunity due to optical isolation
- Supports polling and interrupt‑driven modes

Output Performance:
- Capable of driving relays, LED indicators, and low‑power actuators
- 100 mA continuous sink current per channel ensures stable operation
- Peak current up to 250 mA for transient loads

Efficiency and Reliability:
- Low power consumption through MOSFET switching design
- High isolation voltage prevents damage from transient spikes
- COS interrupt reduces CPU load by eliminating constant polling

Limitations:
- Total output current limited by system thermal budget (16 W max for add‑on cards in fanless mode)
- Requires Neousys driver library for software access
- Operating temperature range depends on system configuration and cooling

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### 8. Standards & Compliance

- Electrical Isolation: 2500 Vrms tested per channel
- EMC Compliance: CE/FCC Class A (EN 55022, EN 55024) when installed in Nuvo‑4000
- Environmental Testing: IEC 60068‑2‑64 (vibration) and IEC 60068‑2‑27 (shock)
- Safety and Reliability: Designed for industrial automation and embedded applications with extended temperature operation
- RoHS Compliance: All Neousys products are manufactured in accordance with RoHS directives

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### 9. Additional Information

Warranty and Support:
- Standard Neousys limited hardware warranty (typically 2 years)
- Technical support available through Neousys Technology and authorized distributors
- Driver and library updates available via Neousys website (www.neousys‑tech.com)

Maintenance:
- No user‑serviceable parts inside the module
- Periodic inspection of connectors and cables recommended for industrial deployments
- Firmware and driver updates should be applied to maintain compatibility with new operating systems

Software Development Resources:
- Header files, libraries, and sample code included in the WDT_DIO package
- Comprehensive API documentation for C/C++ development
- Supports watchdog timer integration for system reliability

Ordering Information:
| Model No. | Description |
| --- | --- |
| OPT 8DI8DO‑4000 | Isolated 8 DI + 8 DO module for Nuvo‑4000 series with panel/cable kit |

Related Nuvo‑4000 Models:
- Nuvo‑4022: Intel 3rd‑Gen Core i Fanless Box‑PC with 2× PCIe + 2× PCI slots
- Nuvo‑4040: Intel 3rd‑Gen Core i Fanless Box‑PC with 4× PCI slots

Manufacturer Contact:
Neousys Technology Inc.
Website: [www.neousys‑tech.com](https://www.neousys-tech.com)
All specifications subject to change without prior notice.

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### Summary

The OPT 8DI8DO‑4000 is a dedicated isolated digital I/O expansion module for the Nuvo‑4000 series of fanless industrial controllers. It delivers 8 channels of isolated digital input and 8 channels of isolated digital output with 2500 Vrms protection, supporting logic levels from 5 V to 24 V and sink currents up to 250 mA. The module is ideal for industrial automation, machine control, and data acquisition applications requiring robust signal isolation and software‑programmable I/O control. With Neousys’ WDT_DIO library and COS interrupt support, developers can implement responsive, event‑driven control systems with minimal CPU overhead. When combined with the high‑performance, fanless Nuvo‑4000 platform, the OPT 8DI8DO‑4000 provides a reliable, compact, and versatile solution for industrial embedded computing environments.