Product Overview
The Allen-Bradley 1794-OV16 is a Flex I/O digital sinking output module from the 1794 series, designed for reliable discrete output control in industrial automation. This module provides 16 sinking outputs rated at 24 Volts DC nominal on-state voltage, making it suitable for driving a variety of field devices such as solenoids, relays, and indicator lights. Its open-style design with an IP 20 environmental protection rating allows for direct mounting on a DIN rail, simplifying installation in control cabinets. The 1794-OV16 connects to the terminal base unit, enabling quick insertion or removal under power without disrupting system operation.
Technical Specifications Breakdown
Key parameters for the 1794-OV16 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Product Type | Flex I/O Digital Sinking Output Module |
| Number of Outputs | 16 Sinking |
| On-state Voltage (nominal) | 24V DC |
| On-state Voltage Range | 10 to 31.2V DC |
| Output Current Rating (per module) | 8.0A |
| On-state Current (per channel) | 500mA max. |
| Off-state Leakage | 0.5mA max. |
| On-state Voltage Drop | 0.2V DC max. |
| Power Dissipation | 4.2W @ 31.2V DC max. |
| Thermal Dissipation | 14.3 BTU/hr. @ 31.2V DC max. |
| Flexbus Current | 80mA |
| Environmental Protection | IP 20 |
Industry Applications
The 1794-OV16 module is widely used in manufacturing lines, material handling systems, and process control applications where discrete output control is essential. In a packaging line, for example, the module can actuate pneumatic valves or motor starters based on PLC commands. The module's ability to operate with an on-state voltage range of 10 to 31.2V DC provides flexibility in systems with varying power supply conditions.
Installation & Setup Guidance
Mount the 1794-OV16 module by snapping it onto a DIN rail. Ensure the terminal base unit (compatible models 1794-TB3 or 1794-TB3S) is properly installed and wired. Connect the external power supply within 10 to 31.2V DC, with a maximum 5% AC ripple, drawing 20 to 65 mA. The module can be inserted or removed under power, reducing downtime. Use the 16 yellow LED status indicators to verify channel operation.
Maintenance & Reliability
For reliable operation, keep the module free from dust and moisture. The IP 20 rating allows use in clean, dry environments. Periodically inspect connections and LED indicators. The module's power dissipation is 4.2W max at 31.2V DC, ensuring minimal heat generation. XT versions are available for extreme environments, reducing panel and maintenance costs.
Compatibility & Integration
The 1794-OV16 supports multiple communication protocols including ControlNet, DeviceNet, EtherNet/IP, and Universal Remote I/O, enabling seamless integration into Rockwell Automation architectures. It works with Flex I/O terminal bases and can be used in distributed I/O applications.
Selection Guide & Purchasing Advice
When selecting the 1794-OV16, consider your system's voltage and current requirements. For purchasing, AutoDCSTech offers genuine Allen-Bradley modules with fast shipping. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Troubleshooting & Common Issues
If a channel fails to energize, check the LED status indicator and verify the external power supply voltage is within 10 to 31.2V DC. Ensure the load current does not exceed 500mA per channel. If the module does not communicate, verify the Flexbus connection and network settings. For persistent issues, inspect the terminal base wiring.
Availability & Condition at AutoDCSTech
| Part Number | 1794-OV16 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
