Allen-Bradley 1794-OV16P Flex I/O Digital Sinking Output Module

Product Introduction

When your industrial automation system demands reliable digital output control, the Allen-Bradley 1794-OV16P delivers robust performance. This Flex I/O digital sinking output module from Rockwell Automation provides 16 protected sinking outputs designed for 24V DC applications. Part of the proven 1794 Flex I/O family, it integrates seamlessly into distributed control architectures, reducing wiring complexity and saving panel space.

Technical Specifications Breakdown

The 1794-OV16P module offers key specifications that ensure dependable operation. It features 16 sinking outputs with a nominal on-state voltage of 24V DC and an output current rating of 8.0A per module. Each channel supports a maximum on-state current of 500mA, with an off-state leakage current of only 0.5mA max. The module operates with an off-state voltage maximum of 31.2V DC and an on-state voltage drop of 0.2V DC max. Power dissipation is rated at 4.2W @ 31.2V DC max, with thermal dissipation of 14.3 BTU/hr. @ 31.2V DC max. The Flexbus current draw is 80mA.

Protected outputs provide electronic shutdown during short-circuit, high-temperature, or overload conditions. The module automatically recovers when the fault is removed, without passing fault status to the processor. This design minimizes downtime and enhances system reliability.

Industry Applications

The 1794-OV16P is ideal for discrete manufacturing, material handling, and process control applications where reliable on/off control of actuators, solenoids, or indicator lights is required. Its 16-point density suits medium-scale I/O requirements, while the protected outputs safeguard against field wiring faults. For example, in a packaging line, this module can control multiple pneumatic valves, ensuring consistent operation even in harsh industrial environments.

Installation & Setup Guidance

Mounting the 1794-OV16P is straightforward: simply snap it onto a DIN rail. It fits into a terminal base unit, such as the 1794-TB3 or 1794-TB3S, which connects field devices and the I/O bus. Modules can be inserted or removed under power, saving time and eliminating system restarts. Ensure the external power supply provides 10–31.2V DC with less than 5% AC ripple and 20–65mA current. The module supports communication options including ControlNet, DeviceNet, EtherNet/IP, and Universal Remote I/O.

Maintenance & Reliability

Routine inspection of the 1794-OV16P should focus on verifying LED status indicators—16 yellow LEDs per channel show output signal status. Check for environmental extremes; XT versions are available for extreme conditions, reducing panel and maintenance costs. No internal user-serviceable parts exist; follow manufacturer guidelines for periodic testing to ensure continued reliable operation.

Compatibility & Integration

This module integrates with Allen-Bradley Flex I/O systems and communicates via popular industrial networks. It works with ControlLogix, CompactLogix, and other Rockwell Automation controllers when paired with appropriate adapters. The 1794-OV16P is compatible with terminal bases 1794-TB3 and 1794-TB3S, and its form factor allows hot-swapping in live systems.

Selection Guide & Purchasing Advice

Before purchasing the 1794-OV16P, verify your system voltage (24V DC nominal) and current requirements (8A per module, 500mA per channel). Confirm compatibility with your existing Flex I/O backplane and communication network. For current availability and lifecycle status, contact BluePLC Industrial. They offer genuine Allen-Bradley products and can advise on replacement options if needed.