1. Product Overview

Product Name: Digital Output F&eIT I/O Module, 16 Channels
Model: DO‑16(FIT)GY
Article Number: DO‑16(FIT)GY
Series: F&eIT (Field & Embedded Intelligent Technology) Expansion Module Series
Manufacturer: CONTEC Co., Ltd., Osaka, Japan

The CONTEC DO‑16(FIT)GY is an opto‑isolated digital output expansion module designed for use with CONTEC’s USB‑based digital I/O modules, specifically the DO‑16(USB)GY. It provides 16 additional open‑collector output channels for industrial control and monitoring applications. The module is part of CONTEC’s F&eIT distributed I/O system, which enables modular expansion of digital and analog I/O capabilities for PC‑based measurement and control systems.

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2. Key Features

- Opto‑Isolated Digital Outputs:
Sixteen opto‑coupler isolated open‑collector outputs (current sink type) provide electrical isolation between the PC and external devices, improving noise immunity and protecting host systems from voltage transients.

- High‑Speed USB Expansion Compatibility:
Designed as an expansion module for the DO‑16(USB)GY, the DO‑16(FIT)GY connects via the F&eIT stack interface, allowing seamless channel expansion without additional USB ports.

- Modular Stackable Design:
Up to three expansion modules can be stacked to a single USB base module, enabling up to 64 output points (16 per module) controlled through one USB connection.

- DIN‑Rail Mountable:
Equipped with a one‑touch DIN‑rail mounting mechanism for easy installation in control panels or industrial enclosures.

- Compact and Lightweight:
The small form factor (50.4 × 64.7 × 94.0 mm) and 100 g weight make it suitable for embedded and distributed control systems.

- Industrial‑Grade Electrical Characteristics:
Supports 12 – 24 V DC output voltage range (±15 %), with a maximum output current of 150 mA per channel.

- Noise‑Resistant Construction:
Opto‑isolation and robust grounding options ensure stable operation in electrically noisy environments.

- Flexible Power Options:
Operates from a 5 V DC supply (±5 %), typically provided by the host module or an external AC/DC adapter when multiple expansion units are used.

- Status Indication:
Each channel features LED indicators for output status, and a LINK LED confirms communication with the host module.

- Software Integration:
Fully supported by CONTEC’s API‑USBP(WDM) driver library for Windows, enabling control via standard Win32 API functions in Visual C++, Visual Basic, C#, Delphi, and other languages.

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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 (max.) |
| External Power Supply | 12 – 24 V DC (±15 %) |
| Isolation Method | Opto‑coupler isolation between I/O and logic circuits |
| Allowable Cable Length | Approx. 50 m (depending on wiring environment) |
| Power Supply (Module) | +5 V DC ±5 %, 150 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 mounting |
| Connector Type | FK‑MC0.5/9‑ST‑2.5 (Phoenix Contact) |
| Compatible Wire Gauge | AWG 28 – 20 |
| Nominal Current (Connector) | 4 A (max.) |
| Maximum Expansion | Up to 3 modules per USB base unit |
| Communication Interface | Stack connection via F&eIT expansion bus |
| Compliance | USB 2.0 High‑Speed (480 Mbps) through host module |
| Cooling | Natural air convection |
| Protection | Opto‑isolation, surge suppression recommended on inductive loads |

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4. Functionality

The DO‑16(FIT)GY functions as an expansion output module for CONTEC’s DO‑16(USB)GY USB digital output unit. It extends the number of available output channels without requiring additional USB ports. Communication and control are handled by the host USB module, while the expansion module provides additional isolated output circuitry.

Operation Principle:
- Each output channel uses an opto‑coupler and transistor stage to switch external loads such as relays, solenoids, or indicator lamps.
- The open‑collector configuration allows sinking current from external 12–24 V DC sources.
- The host module transmits output data via the internal F&eIT expansion bus; the DO‑16(FIT)GY latches and drives the corresponding outputs.

Typical Applications:
- Industrial automation and process control
- PLC‑style digital output expansion for PC‑based systems
- Machine status indication and alarm signaling
- Relay and solenoid actuation
- Distributed I/O in factory monitoring networks

Compatibility:
- Fully compatible with DO‑16(USB)GY host module
- Can be combined with other F&eIT expansion units (DIO‑8/8(FIT)GY, DI‑16(FIT)GY)
- Controlled via CONTEC’s API‑USBP(WDM) driver and supported in LabVIEW through VI‑DAQ libraries

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5. Components & Accessories

Included Items:
- DO‑16(FIT)GY module (1 unit)
- Protective rubber feet (2 pcs)
- Stack connection locking devices (integrated)
- User documentation (electronic/manual)

Optional Accessories:
- Power Supplies:
- POA200‑20 AC Adapter (90–264 V AC → 5 V DC 2 A)
- POW‑AD13GY AC/DC Power Unit (85–132 V AC → 5 V DC 3 A)
- POW‑AD22GY AC/DC Power Unit (85–265 V AC → 5 V DC 2 A)
- POW‑DD10GY DC/DC Power Unit (10–30 V DC → 5 V DC 3 A)
- POW‑DD43GY DC/DC Power Unit (30–50 V DC → 5 V DC 3 A)
- Connectors and Cables:
- FK‑MC0.5/9‑ST‑2.5 interface plug (Phoenix Contact)
- MC1.5/3‑ST‑3.5 power connector plug
- Mounting Accessories:
- DIN‑ADP1 DIN‑rail adapter
- Magnet mounting kit (for metal surfaces)

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6. Installation & Setup

Requirements:
- Host module DO‑16(USB)GY connected to a PC via USB 2.0/1.1 port
- Windows 98/Me/2000/XP or later with CONTEC API‑USBP(WDM) driver installed
- +5 V DC power supply when multiple expansion modules are used

Mounting Options:
- DIN‑Rail Mounting:
The module snaps onto a standard 35 mm DIN rail using the integrated locking hook. To remove, release the hook with a screwdriver and lift the module upward.
- Magnetic Mounting:
Two supplied magnets allow attachment to metal surfaces such as control panels or desks.
- Desktop Use:
Protective rubber feet prevent vibration and provide insulation.

Configuration:
- Device ID Setting:
Each expansion module must be assigned a unique Device ID (1–3) using the rotary switch on the front panel. The host module’s Device ID is fixed at 0.
- Power Connection:
Connect +5 V DC to the Vi+ terminal and ground to Vi–. The FG pin should be grounded in noisy environments.
- Stack Connection:
Align the stack hooks and press modules together until the locking devices engage. Up to three expansion modules can be connected in series.

Software Setup:
- Install the API‑USBP(WDM) driver from the supplied CD or CONTEC website.
- Configure the device name in Windows Device Manager.
- Use CONTEC’s Digital Monitor utility or custom applications via API functions to verify operation.

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7. Performance & Capabilities

- Output Switching Speed: 1 ms (max.) per channel
- Load Capacity: 150 mA (max.) per output at 12–24 V DC
- Isolation Voltage: Opto‑coupler isolation between logic and field circuits
- Noise Immunity: Excellent resistance to electrical interference due to optical isolation and proper grounding
- Scalability: Up to 64 output points (1 host + 3 expansions) per USB port
- Reliability: Industrial‑grade components rated for continuous operation in 0–50 °C environments
- Limitations: No analog output capability; designed exclusively for digital output control. External surge suppression is required for inductive loads.

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8. Standards & Compliance

- USB Compliance: Conforms to USB 2.0 High‑Speed (480 Mbps) and USB 1.1 Full‑Speed (12 Mbps) standards through host module
- Electrical Safety: Opto‑isolation between PC and I/O circuits prevents ground loops and electrical hazards
- Environmental Conditions: Operating 0–50 °C, 10–90 % RH (non‑condensing); no corrosive gases or excessive dust
- EMC Considerations: Recommended use of ferrite cores on cables in noisy environments
- Regulatory Compliance: Designed for industrial automation applications; conforms to CE marking requirements for EMC and safety (per CONTEC’s product line standards)

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9. Additional Information

Warranty:
One‑year limited warranty covering defects in materials and workmanship. The warranty excludes damage from misuse, modification, or environmental factors. Repairs require an RMA number and proof of purchase.

Support & Maintenance:
- Technical Support: Available through CONTEC’s global websites:
- Japan: [www.contec.co.jp](http://www.contec.co.jp)
- Global: [www.contec.com](http://www.contec.com)
- China: [www.contec.com.cn](http://www.contec.com.cn)
- Software Updates: Free driver and firmware updates downloadable from CONTEC’s support portal.
- Diagnostic Tools: Built‑in diagnostic utilities verify hardware and communication status.
- Firmware Upgrade: Modules can be updated individually by setting the Module ID to FFh and using the Firmware Upgrade Tool provided with the API‑USBP(WDM) package.
- Maintenance: Periodic inspection recommended to ensure ventilation openings are unobstructed and connectors are clean.

Safety & Handling Precautions:
- Do not connect or disconnect modules while powered.
- Avoid exposure to flammable gases, moisture, or corrosive environments.
- Ground the FG pin and attach ferrite cores to cables in high‑noise installations.
- Provide surge suppression (diodes or zener circuits) when driving inductive loads such as relays or solenoids.
- Do not open or modify the module enclosure; this voids the warranty.

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

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### Summary

The CONTEC DO‑16(FIT)GY is a robust, opto‑isolated 16‑channel digital output expansion module engineered for industrial and embedded control systems. It extends the output capacity of the DO‑16(USB)GY USB I/O module within the F&eIT distributed I/O architecture. Featuring 12–24 V DC open‑collector outputs, 1 ms response time, and 5 V DC low‑power operation, it delivers reliable performance in demanding environments. Its modular stackable design, DIN‑rail mountability, and comprehensive software support make it an ideal solution for scalable PC‑based automation, data acquisition, and remote control applications.