1. Product Overview

Product Name: DAI16‑4(USB)
Model Number: DAI16‑4(USB)
Series: Intelligent E‑Series USB Analog I/O Modules
Article Number: DAI16‑4(USB)
Manufacturer: CONTEC Co., Ltd. (Japan)
Product Type: USB 2.0‑compliant, opto‑isolated 4‑channel digital‑to‑analog (D/A) output module
Description: The CONTEC DAI16‑4(USB) is a high‑precision, isolated 16‑bit, 4‑channel digital‑to‑analog output module designed for USB 2.0 connectivity. It provides both voltage and current output modes, supports ±10 V, ±5 V, 0–10 V, 0–5 V, and 0–20 mA ranges, and includes a 256 K‑word onboard data buffer for cyclic waveform generation. The module is optically isolated from the host PC, ensuring robust noise immunity and stable operation in industrial measurement and control environments.

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2. Key Features

- USB 2.0 High‑Speed Interface: Fully compliant with USB 2.0 (480 Mbps) and backward compatible with USB 1.1. Enables plug‑and‑play operation with laptops and desktops without requiring internal expansion slots.
- Opto‑Isolated Analog Outputs: Electrical isolation between the PC and external I/O circuits prevents ground loops and protects against noise and surges in industrial environments.
- Four Independent Analog Output Channels: Each channel supports both voltage and current output modes, allowing flexible configuration for a wide range of control applications.
- High‑Resolution 16‑bit D/A Conversion: Provides fine output granularity suitable for precision instrumentation, control, and waveform generation.
- Multiple Output Ranges: Selectable bipolar and unipolar voltage ranges (±10 V, ±5 V, 0–10 V, 0–5 V) and current output range (0–20 mA).
- High‑Speed Conversion: Voltage output conversion speed of 10 µs per channel; current output conversion speed of 20 µs per channel.
- Large Onboard Data Buffer: 256 K‑word (262,144 samples) memory enables continuous or cyclic waveform output independent of host PC processing load.
- Bus Signal Isolation: Ensures stable operation even when connected devices have different ground potentials.
- Compact Industrial Design: Small form factor (50.4 × 64.7 × 94 mm) suitable for control panels, portable measurement systems, and embedded test setups.
- Screwless Terminal Connectors: Uses Phoenix Contact FK‑MC0.5/12‑ST‑2.5 connectors for quick, tool‑free wiring.
- Software Support: Includes Windows drivers, LabVIEW libraries, and sample development utilities. Compatible with CONTEC’s API‑TOOLs for Windows and Linux.
- Expandable Architecture: Up to three extension modules can be connected to increase the number of output channels.
- Included Accessories: AC adapter (POA‑AD22) and USB cable (1.8 m) are supplied for immediate operation.
- Industrial‑Grade Reliability: Designed for continuous operation in measurement, control, and automation systems.

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3. Technical Specifications

| Parameter | Specification |
|----------------|------------------|
| Analog Output Channels | 4 channels |
| Resolution | 16 bits |
| Output Type | Voltage / Current (bus signal isolated) |
| Voltage Output Ranges | Bipolar: ±10 V, ±5 V; Unipolar: 0–10 V, 0–5 V |
| Current Output Range | 0–20 mA |
| Output Drive Capability | ±5 mA (voltage output), 0–20 mA (current output) |
| Conversion Accuracy | Voltage output: ±3 LSB; Current output: ±5 LSB |
| Conversion Speed (Max.) | Voltage: 10 µs/ch; Current: 20 µs/ch |
| Buffer Memory | 256 K data (262,144 samples) |
| Sampling Timer | 10 µs – 1,073,741,824 µs (programmable) |
| Isolation Method | Opto‑isolation between PC and I/O circuits |
| Connector Type | FK‑MC0.5/12‑ST‑2.5 (Phoenix Contact) |
| USB Interface | USB 2.0 High‑Speed (480 Mbps), backward compatible with USB 1.1 |
| Power Supply | 5 V DC ± 5 % (supplied via AC adapter) |
| Power Consumption | 700 mA (max.) |
| Dimensions (W × D × H) | 50.4 × 64.7 × 94.0 mm (excluding protrusions) |
| Weight | Approx. 100 g |
| Operating Temperature Range | 0 – 50 °C (typical for CONTEC USB modules) |
| Storage Temperature Range | –10 – 60 °C |
| Humidity | 10 – 90 % RH (non‑condensing) |
| Included AC Adapter | POA‑AD22 (AC 90–264 V → DC 5 V ± 5 %, 2.0 A max., 1.4 m cable) |
| Included Cable | USB 2.0 cable, 1.8 m length |
| Mounting Orientation | Desktop or panel‑mount (DIN‑rail adapter optional) |

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4. Functionality

The DAI16‑4(USB) operates as a USB‑connected digital‑to‑analog converter module. It receives digital data from the host PC via the USB 2.0 interface and converts it into analog voltage or current signals on four independent output channels. Each channel can be configured for voltage or current mode, enabling direct control of actuators, transducers, or analog instrumentation.

The onboard 256 K‑word buffer allows pre‑loading of waveform data for continuous or cyclic output without relying on the host CPU. This enables stable, real‑time analog signal generation even under variable PC processing loads. The module’s opto‑isolation ensures that the PC is protected from electrical noise, surges, or ground potential differences in the external circuit.

Typical Use Cases:
- Industrial process control and analog actuator driving
- Test and measurement systems requiring precise analog signal generation
- Laboratory automation and data acquisition setups
- Signal simulation for sensor calibration and equipment testing
- Educational and research environments for analog control experiments
- Portable field measurement systems using laptop PCs

Compatibility:
- Compatible with Windows 10/11 and Linux distributions supported by CONTEC’s API‑TOOLs.
- Integrates with LabVIEW and MATLAB through downloadable VI‑DAQ and ML‑DAQ libraries.
- Operates with any PC equipped with a USB 2.0 or USB 3.0 port (backward compatible).

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5. Components & Accessories

Included Items:
- DAI16‑4(USB) main module
- AC adapter (POA‑AD22, 5 V DC 2.0 A max.)
- USB 2.0 cable (1.8 m)
- User manual and setup guide
- Windows driver and sample software (downloadable from CONTEC website)

Optional Accessories:
- Power Supply Units: POW‑AD13GY, POW‑AD22GY, POW‑AD25GY, POW‑DD10GY, POW‑DD43GY
- Extension Modules: DAI16‑4(FIT)GY (for channel expansion)
- Terminal Blocks: EPD‑37A, EPD‑37 (for analog signal wiring)
- Cables: PCA37P, PCB37P, PCA37PS, PCB37PS (for connection to terminal units)
- DIN‑Rail Mounting Adapter: DIN‑ADP1 (for panel installation)
- Software Libraries: API‑TOOLs for Windows/Linux, VI‑DAQ for LabVIEW, ML‑DAQ for MATLAB

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6. Installation & Setup

Requirements:
- PC with available USB 2.0 or higher port
- Windows 10/11 or Linux OS (kernel version supported by CONTEC drivers)
- Administrative privileges for driver installation
- 5 V DC power supply (via included AC adapter)

Installation Procedure:
1. Install the CONTEC USB driver package (API‑TOOLs) from the provided media or download from the CONTEC website.
2. Connect the AC adapter to the DAI16‑4(USB) and power it on.
3. Connect the module to the PC using the supplied USB cable. The system automatically recognizes the device.
4. Launch the configuration utility to verify communication and assign channel parameters (voltage/current mode, range, sampling rate).
5. Connect external devices to the screwless terminal connector according to the wiring diagram.
6. Use the provided sample software or integrate the module into custom applications via the API library.

Mounting Options:
- Desktop placement for laboratory use
- DIN‑rail mounting using optional adapter for industrial panels
- Stackable configuration with other CONTEC USB modules for multi‑channel systems

Configuration:
- Output range and mode (voltage/current) selectable per channel via software
- Sampling timer programmable for continuous or triggered operation
- Buffer memory mode selectable (FIFO or ring) for cyclic waveform output

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7. Performance & Capabilities

- High‑Speed Output: 10 µs per channel for voltage mode and 20 µs per channel for current mode enable rapid waveform generation.
- Precision Conversion: 16‑bit resolution ensures fine control over analog output levels, suitable for precision instrumentation.
- Large Data Buffer: 256 K‑word memory supports long waveform sequences or repetitive signal patterns without host intervention.
- Stable Operation: Opto‑isolation and dedicated power supply minimize noise coupling and ground interference.
- Scalability: Up to three extension modules can be connected to expand the number of output channels.
- Efficiency: Offloads waveform generation from the host CPU, allowing real‑time analog output even during intensive PC tasks.
- Limitations:
- Maximum output current limited to ±5 mA (voltage mode) or 20 mA (current mode).
- Output range common to all channels (cannot mix voltage and current modes simultaneously).
- Requires external power supply; cannot be powered solely from USB bus.

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8. Standards & Compliance

- USB Compliance: USB 2.0 High‑Speed (480 Mbps) and USB 1.1 Full‑Speed (12 Mbps) compatible.
- Isolation: Opto‑isolated bus interface compliant with industrial noise immunity standards.
- Safety & EMC: Designed to meet CE marking requirements for electromagnetic compatibility and safety (typical for CONTEC industrial modules).
- Environmental Compliance: RoHS‑compliant construction (lead‑free solder, environmentally safe materials).
- Software Standards: Supports standard Win32 API (DLL) interface for Windows and shared library interface for Linux.
- Industry Standards: Compatible with LabVIEW VI‑DAQ and MATLAB Data Acquisition Toolbox through CONTEC’s ML‑DAQ library.

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9. Additional Information

Warranty:
Standard CONTEC limited warranty (typically one year) covering defects in materials and workmanship under normal use.

Technical Support:
- Free driver and software updates available from CONTEC’s global portal (www.contec.com).
- Online documentation, FAQs, and sample code libraries provided.
- Email and phone support available through regional CONTEC offices.

Maintenance:
- Periodic inspection of connectors and cables recommended.
- Keep module in a clean, dry environment; avoid exposure to excessive vibration or moisture.
- Firmware and driver updates can be applied via USB connection.

Software Updates & Utilities:
- API‑TOOLs for Windows/Linux: License‑free development and runtime libraries for direct hardware control.
- VI‑DAQ for LabVIEW: Virtual instrument library enabling easy integration with National Instruments LabVIEW environment.
- ML‑DAQ for MATLAB: MATLAB library for direct data acquisition and control from MATLAB scripts.
- Utility Software: Includes sample waveform generation, calibration, and diagnostic tools.

Support Ecosystem:
The DAI16‑4(USB) is part of CONTEC’s comprehensive analog I/O product family, which includes analog input (ADI16‑4(USB)), analog output (DAI12‑4(USB)GY), and temperature input (PTI‑4(USB)) modules. These devices share a common software interface and mechanical design, allowing users to build modular, scalable measurement and control systems.

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### Summary

The CONTEC DAI16‑4(USB) is a compact, high‑precision, opto‑isolated 16‑bit, 4‑channel digital‑to‑analog output module designed for USB 2.0 connectivity. It combines industrial‑grade isolation, high‑speed conversion, and large onboard memory in a portable form factor. With selectable voltage and current output ranges, 256 K‑word buffer memory, and comprehensive software support for Windows, Linux, LabVIEW, and MATLAB, it provides a versatile solution for laboratory instrumentation, process control, and automated test systems. The inclusion of an AC adapter and USB cable ensures immediate usability, while optional accessories and expansion modules allow flexible system scaling. Robust isolation and precision performance make the DAI16‑4(USB) an ideal choice for engineers and researchers requiring reliable, high‑accuracy analog signal generation in PC‑based measurement environments.