Technical Specifications Breakdown
Key parameters for the 1794-OA8 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Product Type | Flex I/O Digital Output Module |
| Outputs | 8 Nonisolated |
| Output Voltage (nom.) | 120V AC |
| Output Current Rating | 4.0A |
| On-state Current (min.) | 5mA per Output |
| On-state Voltage Drop (max.) | 1.0V @ 0.5A max. |
| Off-state Leakage Current (max.) | 2.25mA |
| Isolation Voltage | 120V Continuous |
| Flexbus Current | 80mA @ 5V DC |
| Power Dissipation | 4.1W @ 0.5A max. |
| Thermal Dissipation | 14.0 BTU/hr. @ 0.5A max. |
Industry Applications
Its diagnostics enable faster fault detection, reducing downtime in high-volume production environments. The 1794-OA8 is well-suited for non-hazardous industrial settings, including Class 1, Division 2 areas, where robust performance is critical.
Installation & Setup Guidance
Mount the module directly onto compatible terminal base units such as the 1794-TBNK, 1794-TBKD, 1794-TB3K, 1794-TBNFK, 1794-TB3SK, 1794-TBNF, 1794-TB3, 1794-TB2, 1794-TB3S, or 1794-TBN. If using the 1794-TBN base unit, auxiliary terminal strips are required. Ensure proper wiring per the module's specifications to maintain isolation and avoid overloading outputs.
Maintenance & Reliability
Periodically inspect the module and its connections for signs of wear or environmental stress. The 1794-OA8 is designed for reliable operation in industrial environments, but regular checks of output current and voltage levels help prevent unexpected failures. Keep the module clean and within specified thermal limits to maximize service life.
Compatibility & Integration
It is compatible with various Allen-Bradley controllers and I/O systems that support Flex I/O architecture. Always verify system compatibility before installation.
Selection Guide & Purchasing Advice
When selecting the 1794-OA8, consider your load requirements and environmental conditions. For non-hazardous and Class 1, Division 2 applications, this module provides a cost-effective solution. AutoDCSTech offers genuine Allen-Bradley 1794-OA8 modules with fast shipping and expert support. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Troubleshooting & Common Issues
If outputs fail to switch, check the power supply and wiring connections. Use the module's diagnostic features to identify field device or wiring faults. Ensure the load current meets the minimum on-state current of 5mA per output. For persistent issues, verify that the FlexBus current (80mA @ 5V DC) is within system limits.
Availability & Condition at AutoDCSTech
| Part Number | 1794-OA8 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
