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- Allen Bradley
- 1794-OB16D
- ControlNet Flex I/O Adapter Module
- USA
- 91 mm × 94 mm × 94 mm
- 0.25kg
- Xiamen, China
- New & In Stock
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- 1 Year
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Allen-Bradley 1794-OB16D Technical Overview and Application Guide
1. Product Introduction
The 1794-OB16D is a Flex I/O 16-point digital DC output module with diagnostics designed for distributed industrial control systems. It is used to drive field devices such as relays, solenoids, indicators, and contactors in automation environments.
This module belongs to a modular I/O platform where it is installed on a terminal base and communicates through a backplane system. Its diagnostic function allows detection of wiring faults such as open or shorted output conditions, improving system reliability in industrial automation systems.
It is widely used in machine control, process automation, and remote I/O applications where compact, flexible, and modular expansion is required.
2. Product Key Specifications
| Parameter | Value |
|---|---|
| Output Type | 16-point DC sourcing output |
| Rated Output Voltage | 24V DC (nominal) |
| Output Current Capacity | 8.0 A total |
| Max Current per Channel | 0.5 A |
| Surge Current | 2 A (50 ms, repeatable) |
| Number of Outputs | 16 channels |
| Isolation Voltage | 50 V (basic insulation) |
| Power Supply Range | 10–31.2 V DC |
| Backplane Current | 60 mA @ 5 V DC |
| Power Dissipation | 4.8 W max |
| Thermal Dissipation | 16.4 BTU/hr |
| Signal Delay | ~0.5 ms |
| Operating Temperature | 0 to 55 °C |
| Dimensions | 91 mm × 94 mm × 94 mm |
| Weight | ~0.12–0.25 kg |
| Mounting Type | DIN rail (Flex I/O base) |
| Diagnostic Function | Yes (channel fault detection) |
3. Product Features
The 1794-OB16D is designed with several functional enhancements:
- 16 independent DC sourcing outputs for flexible load control
- Built-in diagnostics for detecting field wiring faults
- LED indicators for each channel and module status
- Compact modular structure for distributed control systems
- Low signal delay suitable for high-speed switching applications
- High channel density in a small footprint design
4. Product Applications
The module is commonly used in industrial automation systems such as:
- Conveyor and material handling systems
- Packaging machinery control
- Automotive production lines
- Food and beverage processing equipment
- Pump and motor control systems
- Remote I/O panels in distributed control systems
- Machine automation requiring multiple discrete outputs
It is especially suitable for environments where signals must be distributed over long distances with reduced wiring complexity.
5. Product Advantages
- High-density 16-channel output reduces cabinet space usage
- Integrated diagnostics improves maintenance efficiency
- Fast switching response supports real-time control
- Modular design allows easy system expansion
- Stable operation in industrial environments
- Reduced wiring cost compared to centralized I/O systems
- Compatible with Flex I/O architecture for flexible configuration
6. Brand and Series Information
| Category | Description |
|---|---|
| Brand | Industrial automation control equipment manufacturer (not shown as requested) |
| Series | FLEX I/O 1794 Series |
| Product Family | Distributed modular I/O system |
| Module Type | Digital DC Output Module with diagnostics |
The FLEX I/O 1794 series is designed for scalable distributed control applications, allowing users to mix input, output, analog, and specialty modules within the same architecture.
7. Recommended Models – Same Series or Related Modules
Same FLEX I/O Series Alternatives
| Model | Type | Key Characteristics | Voltage | Weight (kg) | Dimensions |
|---|---|---|---|---|---|
| 1794-IB16D | Digital Input Module | 16-point DC input with diagnostics | 24V DC | ~0.15 kg | ~92×94×53 mm |
| 1794-OB16A | Digital Output Module | Standard 16-point output (non-diagnostic) | 24V DC | ~0.12 kg | ~91×94×94 mm |
| 1794-OW8 | Relay Output Module | 8-point relay output | 24V DC | ~0.2 kg | ~91×94×94 mm |
| 1794-IE8 | Analog Input Module | 8-channel analog input | — | ~0.18 kg | ~91×94×94 mm |
| 1794-IE12 | Analog Input Module | Higher density analog input | — | ~0.22 kg | ~91×94×94 mm |
8. Same Brand Popular Models (Across Series)
Widely Used Industrial Control Modules
| Model | Type | Function | Voltage | Weight (kg) | Dimensions |
|---|---|---|---|---|---|
| 1756-OB16E | ControlLogix Output Module | High-performance 16-point output | 24V DC | ~0.3 kg | ~150×90×100 mm |
| 1756-IB16I | ControlLogix Input Module | 16-point isolated input | 24V DC | ~0.3 kg | ~150×90×100 mm |
| 1734-OB8 | POINT I/O Output Module | Compact distributed output | 24V DC | ~0.1 kg | ~56×75×50 mm |
| 1769-IQ16 | CompactLogix Input Module | 16-point input module | 24V DC | ~0.25 kg | ~118×87×40 mm |
| 1769-OB16 | CompactLogix Output Module | 16-point output module | 24V DC | ~0.25 kg | ~118×87×40 mm |
9. Engineering Summary
The 1794-OB16D is a high-density, modular output solution designed for distributed automation systems. Its main strength lies in combining multiple outputs with integrated diagnostics in a compact form factor.
It is particularly useful in environments requiring scalable I/O expansion, reduced wiring complexity, and real-time fault detection capability.
Compared with standard output modules, it provides enhanced maintenance visibility and better system reliability, making it suitable for modern industrial automation architectures.