Product Overview: Allen-Bradley 1794-OE12 Flex IO Analog Output Module
The Allen-Bradley 1794-OE12 is a high-density analog output module in the Flex IO family. It delivers twelve single-ended, non-isolated channels configurable for 0-20 mA, 4-20 mA current, or ±10 VDC voltage signals. This module converts digital control data into precise analog outputs, making it a versatile building block for industrial control systems.
With a 16-bit resolution and 2's complement data format, the 1794-OE12 ensures accurate signal generation. Its open-type enclosure requires installation inside a protective cabinet, and it mounts easily on a DIN rail. The module works with 1794-TB3G and 1794-TB3GS terminal bases, simplifying field wiring.
Technical Specifications Breakdown
The 1794-OE12 offers key performance metrics that matter in real-world automation:
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Output Channels: 12 single-ended, non-isolated
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Output Types: 0-20 mA, 4-20 mA, ±10 VDC
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Resolution: 16-bit, 2's complement, left justified
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FlexBus Current: 80 mA
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External DC Supply: Nominal 24V DC, range 10.0–31.2V DC (includes 5% AC ripple)
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Voltage Output Current Load: 3 mA max
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Voltage Resolution: 320 µV/cnt
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Current Resolution: 0.641 µA/cnt
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Resistive Load (mA Output): 750 Ω @ 24V DC
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Power Dissipation: 4.0W @ 31.2V DC
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Thermal Dissipation: 4.7 BTU/hr @ 24V DC
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Mounting: DIN Rail
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Operating Temperature: 0 to 55°C (32 to 131°F)
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Storage Temperature: –40 to 85°C (–40 to 185°F)
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Vibration: 5g @ 10 to 500 Hz
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Operating Shock: 30g
These specifications ensure reliable performance across typical industrial environments.
Real-World Applications
The Allen-Bradley 1794-OE12 excels in applications requiring multiple analog outputs from a compact module. Typical use cases include:
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Process Control: Driving valve positioners or variable frequency drives with 4-20 mA signals.
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Manufacturing Lines: Controlling speed setpoints on conveyor systems via ±10 VDC outputs.
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Test & Measurement: Generating precise analog signals for equipment calibration.
Because it supports both current and voltage outputs, the 1794-OE12 adapts to diverse field devices without extra converters.
Installation & Setup Guidance
Mount the 1794-OE12 on a DIN rail inside a suitable enclosure. Use a 1794-TB3G or 1794-TB3GS terminal base; these provide the wiring interface. Ensure the external DC supply is within 10.0–31.2V DC. Wire field devices according to the terminal base layout, respecting the non-isolated channel architecture. After power-up, configure the module through the network adapter before outputs become active—until then, outputs remain at 0 mA.
Maintenance & Reliability
The 1794-OE12 requires no calibration and has no moving parts, minimizing upkeep. Periodically inspect the enclosure for dust or moisture, and verify that the DC supply stays within the specified range. The module's 30g shock rating and 5g vibration tolerance make it robust for demanding environments. Regular checks of terminal connections help prevent signal degradation.
Compatibility & Integration
This module works with any 1794 Flex IO adapter, allowing seamless integration into Rockwell Automation control systems. It pairs with 1794-TB3G and 1794-TB3GS terminal bases. The FlexBus interface supplies power and communication, so verify the adapter's capacity to handle the 80 mA FlexBus load.
Selection Guide & Purchasing Advice
Before ordering, confirm your system's adapter compatibility and terminal base requirement. The 1794-OE12 is a genuine Allen-Bradley part (UPC 10612598320193). For reliable sourcing, consider PLC Source PRO, a trusted supplier of industrial automation spares. Ensure your order includes the correct terminal base if not already in stock.