1. Product Overview

Product Name: USB 2.0 16-Channel Digital Output Isolated Module
Model: DO-16(USB)GY
Article Number: DO-16(USB)GY
Series: USB Isolated Digital I/O Module Series
Manufacturer: CONTEC CO., LTD. (Osaka, Japan)

The CONTEC DO-16(USB)GY is a compact, high-performance USB 2.0 digital output module designed for industrial automation and measurement systems. It provides 16 opto-isolated open-collector output channels supporting 12–24 V DC operation. The module connects directly to a PC via USB 2.0 (High-Speed 480 Mbps) and can be expanded with optional modules to increase I/O capacity. It is engineered for robust noise immunity, easy installation on 35 mm DIN rails, and seamless integration with Windows-based control and data acquisition systems.

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2. Key Features

- 16 Opto-Isolated Digital Outputs:
Sixteen open-collector output channels (current sink type) with opto-coupler isolation ensure electrical separation between the PC and external circuits, protecting against noise and surges.

- 12–24 V DC Output Range:
Each output channel supports 12–24 V DC (±15%) with a maximum current of 150 mA per point, suitable for driving relays, lamps, and indicators.

- USB 2.0 High-Speed Interface:
Fully compliant with USB 1.1/2.0 standards, supporting both Full-Speed (12 Mbps) and High-Speed (480 Mbps) communication. The module can be powered directly from the USB bus or via an external 5 V DC supply.

- Optical Bus Isolation:
The USB interface is isolated from the I/O circuitry by opto-couplers, providing excellent noise immunity and protecting the host PC from electrical disturbances.

- Compact DIN-Rail Mountable Design:
Integrated 35 mm DIN rail mounting bracket allows quick installation in control panels or industrial enclosures. Optional magnets and protective rubber feet enable flexible mounting on desks or metal surfaces.

- Expandable Architecture:
Up to three expansion modules (DO‑16(FIT)GY) can be stacked to increase the number of output channels without additional USB ports.

- Screwless Terminal Connectors:
Phoenix Contact FK‑MC0.5/9‑ST‑2.5 connectors allow tool-free wiring with AWG 28–20 cables, simplifying installation and maintenance.

- Trigger Monitoring and Status LEDs:
Integrated microcontroller monitors output status and communication link. LEDs indicate USB link status (green) and output activity (red).

- Software Support:
Includes CONTEC’s API‑USBP(WDM) driver library for Windows, compatible with Visual C++, Visual Basic, C#, Delphi, and C++ Builder. Diagnostic utilities and sample programs are provided. LabVIEW integration is supported via VI‑DAQ library.

- Industrial-Grade Reliability:
Designed for 0–50 °C operation, 10–90 % RH (non‑condensing), and up to 50 m signal cable length depending on environment.

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3. Technical Specifications

| Parameter | Specification |
|----------------|-------------------|
| Output Type | Opto-isolated open collector (current sink type, negative logic) |
| Number of Output Channels | 16 points (8 points/common) |
| Output Voltage Range | 12–24 V DC (±15 %) |
| Maximum Output Current | 150 mA per point |
| Response Time | ≤ 1 ms |
| External Power Supply | 12–24 V DC (±15 %) |
| Isolation Method | Opto-coupler isolation between USB bus and I/O circuits |
| Allowable Cable Length | Approx. 50 m (depending on wiring environment) |
| USB Interface | USB 2.0 (High‑Speed 480 Mbps / Full‑Speed 12 Mbps) |
| Power Consumption | +5 V DC 450 mA (Max.) |
| Operating Temperature | 0 – 50 °C |
| Operating Humidity | 10 – 90 % RH (non‑condensing) |
| Dimensions (W × D × H) | 50.4 × 64.7 × 94.0 mm (excluding protrusions) |
| Weight | Approx. 100 g |
| Mounting Method | One‑touch 35 mm DIN rail mount (standard) |
| Connector Type | FK‑MC0.5/9‑ST‑2.5 (Phoenix Contact) |
| Compatible Wire Gauge | AWG 28 – 20 (2.5 mm pitch, 4 A max.) |
| Maximum Modules per USB Bus | 127 devices (including hubs) |
| Expansion Modules | DO‑16(FIT)GY (up to 3 modules, +5 V DC 150 mA each) |
| Environmental Resistance | No corrosive gases, minimal dust |
| Compliance | USB 2.0 standard, CE marking (implied), RoHS compliant |

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4. Functionality

The DO‑16(USB)GY functions as a digital output interface between a PC and external control devices. Each output channel is optically isolated and configured as an open‑collector transistor output capable of sinking current from external loads. The module’s internal microcontroller manages USB communication, output control, and status monitoring.

Typical Use Cases:
- Driving relays, solenoids, and indicator lamps in automation systems
- Controlling external actuators or alarms from PC-based control software
- Integration into test benches, data acquisition systems, or laboratory setups
- Expansion of digital output capacity for embedded or distributed control systems

Compatibility:
- Compatible with Windows 98/Me/2000/XP operating systems
- Supports programming in Visual C++, Visual Basic, C#, Delphi, and C++ Builder
- Integrates with LabVIEW via VI‑DAQ library for graphical programming environments

Communication and Control:
- The module communicates with the host PC via USB 2.0 using CONTEC’s API‑USBP(WDM) driver.
- Output states can be set or cleared programmatically through API functions.
- The internal CPU supports trigger monitoring and can report output status changes to the host at 1 ms intervals.

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5. Components & Accessories

Included Items:
- DO‑16(USB)GY main module
- USB 2.0 cable (1.8 m)
- Two × FK‑MC0.5/9‑ST‑2.5 interface connector plugs
- One × MC1.5/3‑ST‑3.5 power connector plug
- Protective rubber feet (× 4)
- Mounting magnets (× 2)
- CD‑ROM (API‑USBP(WDM) driver, utilities, manuals)
- First Step Guide

Optional Accessories:
- Expansion Modules: DO‑16(FIT)GY (16 outputs, +5 V DC 150 mA each)
- AC Adapters:
- POA200‑20 (90–264 V AC → 5 V DC 2.0 A)
- POW‑AD13GY (85–132 V AC → 5 V DC 3.0 A)
- POW‑AD22GY (85–265 V AC → 5 V DC 2.0 A)
- DC‑DC Power Supplies:
- POW‑DD10GY (10–30 V DC → 5 V DC 3.0 A)
- POW‑DD43GY (30–50 V DC → 5 V DC 3.0 A)
- DIN Rail Adapter: DIN‑ADP1
- LabVIEW and MATLAB Libraries: VI‑DAQ and ML‑DAQ

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6. Installation & Setup

Requirements:
- PC with available USB 2.0 or 1.1 port
- Windows 98 SE or later
- Administrator privileges for driver installation

Setup Procedure:
1. Connect the Module:
Attach the USB cable between the PC and the module. The “Found New Hardware Wizard” will start automatically.
2. Install the Driver:
Insert the supplied CD‑ROM and install the API‑USBP(WDM) driver.
3. Configure Device Name:
In Windows Device Manager, assign a unique device name under “CONTEC Devices.”
4. Mounting:
- Attach directly to a 35 mm DIN rail using the integrated latch.
- Alternatively, use magnets or rubber feet for desktop placement.
5. External Power (Optional):
Connect +5 V DC (±5 %) to the MC1.5/3‑ST‑3.5 terminal if self‑power operation is desired.
6. Wiring:
Use the supplied screwless connectors for output wiring. Strip 7–8 mm of insulation and insert the wire while pressing the orange release button.

Module ID Setting:
Each module includes rotary switches (x16 and x1) for assigning a unique Module ID (00–7Fh). When multiple identical modules are connected, assign distinct IDs.

DIN Rail Mounting:
Hook the upper edge of the module onto the rail, press the lower edge until the latch clicks. To remove, release the latch with a screwdriver and lift the module off.

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7. Performance & Capabilities

- Output Switching Speed: ≤ 1 ms per channel
- Load Capacity: 150 mA max per channel at 12–24 V DC
- Isolation Voltage: Opto‑coupler isolation between USB bus and I/O circuits
- Noise Immunity: Optical isolation and recommended ferrite core filtering ensure stable operation in noisy industrial environments.
- Expansion Capability: Up to three DO‑16(FIT)GY modules can be stacked for a total of 64 output points (16 + 3 × 16).
- Bus Capacity: Up to 127 USB devices (including hubs) can be connected to a single PC.
- Reliability: All outputs default to OFF on power‑up or USB disconnection to prevent unintended activation.

Limitations:
- Designed for DC loads only (12–24 V DC).
- Not intended for direct AC control without external relay interfaces.
- Total current draw limited by USB bus power (450 mA max per module).

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8. Standards & Compliance

- USB Compliance: Fully compliant with USB 1.1 and USB 2.0 specifications.
- Electrical Safety: Opto‑isolated I/O circuits protect the host PC from external surges and ground loops.
- Environmental Standards: Designed for industrial environments (0–50 °C, 10–90 % RH).
- Regulatory Compliance: Meets CE and RoHS requirements for electronic equipment (specific markings per region).
- Software Standards: API‑USBP(WDM) driver conforms to Microsoft Win32 API standards.

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9. Additional Information

Warranty:
One‑year limited warranty against defects in materials and workmanship. Warranty covers electronic circuitry only and excludes damage from misuse or modification. Repairs require Return Merchandise Authorization (RMA) and proof of purchase.

Support & Downloads:
- Website: [https://www.contec.com](https://www.contec.com)
- Downloads: Drivers, utilities, and sample programs available free of charge.
- Languages Supported: English, Japanese, Chinese.

Maintenance:
- Periodically inspect ventilation slots and connectors for dust or debris.
- Avoid exposure to corrosive gases or excessive vibration.
- Clean with a dry cloth; do not use solvents.

Firmware and Driver Updates:
Firmware can be upgraded via the API‑USBP(WDM) Firmware Upgrade Tool. Set Module ID to FFh for update mode. Latest firmware and drivers are available from CONTEC’s website.

Safety Precautions:
- Do not connect or disconnect expansion modules while powered.
- Ground the FG pin and USB shield in noisy environments.
- Attach ferrite cores to USB and power cables to reduce EMI.
- Disconnect power immediately if overheating or odor is detected.

Disposal:
Dispose of the product in accordance with local electronic waste regulations.

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Summary

The CONTEC DO‑16(USB)GY is a robust, opto‑isolated USB digital output module engineered for industrial and laboratory applications requiring reliable PC‑based control of external devices. Its combination of 16 isolated outputs, USB 2.0 connectivity, DIN‑rail mounting, and software support for Windows and LabVIEW makes it an ideal solution for automation, testing, and data acquisition systems. With expandable architecture, noise‑resistant design, and comprehensive software tools, the DO‑16(USB)GY delivers industrial‑grade performance in a compact and flexible form factor.