Overview
The Allen-Bradley 1794-OV16 is a 16-point digital sinking output module in the Flex I/O family, designed for distributed I/O in modern control systems. This module provides reliable 24VDC sinking outputs in an open-style enclosure, ideal for space-constrained automation applications. The 1794-OV16 integrates seamlessly with FlexLogix controllers and Flex I/O adapters, enabling modular I/O architecture without bulky rack-based systems.
Key Features
- 16 individual sinking output channels for driving solenoids, relays, and contactors
- Hot-swappable design—insert or remove under backplane power without system shutdown
- DIN rail mounting with open-style enclosure for compact panel integration
- IP20 environmental protection rating suitable for industrial control cabinets
- Yellow LED status indicators on each channel for field-side monitoring
- Compatible with ControlNet, DeviceNet, EtherNet/IP, and Universal Remote I/O communication options via Flex I/O adapters
Technical Specifications
- Output Type: 16-point, discrete, sinking (non-isolated)
- Nominal Output Voltage: 24VDC
- On-State Voltage Range: 10 to 31.2VDC (includes 5% AC ripple)
- Per-Channel Output Current: 500 mA (maximum)
- Module Maximum Output Current: 8 A total
- Off-State Leakage: 0.5 mA maximum per channel
- Output Signal Delay: 0.5 ms (Off-to-On), 1.0 ms (On-to-Off)
- External Power Supply (Field Side): 10 to 31.2VDC, 20 to 65 mA
- Maximum Power Dissipation: 4.2 W @ 31.2VDC
- Operating Temperature: 0 to 55°C (32 to 131°F)
- Humidity: 5 to 95% non-condensing
- Enclosure: Open-style, IP20 rating
- Mounting: DIN rail, panel-mountable
- Dimensions: 3.7 × 3.7 × 2.7 inches
- Weight: Approximately 78 grams
- Certifications: UL, CSA, CE, GOST, KC, C-TICK, Marine
Typical Applications
The 1794-OV16 is commonly deployed in:
- Distributed control of motor starters, solenoid valves, and pneumatic actuators
- Compact industrial systems requiring modular I/O without large control panels
- Remote monitoring and control via EtherNet/IP or DeviceNet over plant networks
- Food & beverage, automotive, packaging, and material handling equipment
- OEM machine builders using FlexLogix-based control architectures
Compatibility & Replacements
The 1794-OV16 requires a compatible 1794 series terminal base unit for operation. Supported bases include 1794-TB3 and 1794-TB3S. The module communicates through a Flex I/O adapter (such as 1794-AENT for EtherNet/IP) connected to your processor platform. One adapter supports up to eight I/O modules, enabling cost-effective expansion. Engineers integrating legacy systems may evaluate the 1794-OB16 as a sourcing-type alternative, though this requires verification of your wiring topology. For ControlNet or DeviceNet communication, use corresponding 1794 adapter modules.
