Allen-Bradley 1794-OE12 FLEX I/O Output Module | 12-Channel, 4-20mA/0-20mA, 12-bit, IP20 Specs

Allen-Bradley 1794-OE12 FLEX I/O Output Module | 12-Channel, 4-20mA/0-20mA, 12-bit, IP20 Specs

Allen-Bradley 1794-OE12 FLEX I/O analog output module specifications. 12-channel analog output, 4-20mA/0-20mA, 12-bit resolution, IP20. For industrial process control.

Product Overview

The Allen-Bradley 1794-OE12​ is a 12-channel analog output module​ from the FLEX I/O series, designed for industrial process control applications. This module provides 12 configurable output channels​ supporting 4-20mA and 0-20mA current signals, with 12-bit resolution, and connects to FLEX I/O adapter modules. The "1794" designation indicates the FLEX I/O module series, "OE12" specifies the 12-channel analog output configuration. This module enables precise analog control signal generation for valves, actuators, drives, and other process control devices in distributed I/O systems.

Technical Specifications

Note: Specifications are based on Allen-Bradley 1794 series technical documentation. The "1794-OE12" model specifically indicates 12-channel analog output configuration. Actual specifications may vary slightly depending on production batch.

Model Number Decoding (1794-OE12)

• 1794:​ Series designation (FLEX I/O module series)

• OE12:​ Module type (OE = analog output, 12 = 12 channels)

Note:​ The "OE" prefix indicates analog output functionality. The "12" specifies 12 output channels. This is a high-density output module designed for applications requiring multiple control outputs. This module requires a 1794 FLEX I/O adapter (1794-AENT, 1794-ASB, etc.) and terminal base (1794-TB3G/TB3S) for operation.

Key Features

• 12 Output Channels:​ Twelve analog output channels in compact design

• Configurable Outputs:​ Each channel configurable for 4-20mA or 0-20mA range

• 12-bit Resolution:​ 4096-step resolution for control applications

• High Accuracy:​ ±0.1% of span accuracy

• Fast Response:​ 1 ms to 90% of final value

• Short Circuit Protection:​ Current limiting with auto-recovery

• Status Indicators:​ LED status for module and channel health

• Removable Terminals:​ Terminal base allows easy wiring and maintenance

• High-Density Design:​ Twelve channels in compact footprint

• Industrial Grade:​ Designed for harsh industrial environments

• International Certifications:​ Multiple agency approvals for global use

• Easy Integration:​ Plug-and-play with FLEX I/O system

Output Characteristics

Typical Applications

• Process Control:​ Control valve positioning in chemical processes

• Flow Control:​ Analog control of flow control valves

• Temperature Control:​ Control signal to temperature controllers

• Level Control:​ Control of level control valves

• Pressure Control:​ Control of pressure regulating valves

• Speed Control:​ Analog speed reference for variable frequency drives

• Position Control:​ Control of proportional valves

• Mix Ratio Control:​ Control of ingredient feed rates

• pH/Conductivity Control:​ Control of chemical dosing pumps

• Analytical Instrumentation:​ Control signals for process analyzers

Important Technical Notes

1. System Requirements:​ Requires 1794 FLEX I/O adapter module (1794-AENT, 1794-ASB, etc.) and terminal base (1794-TB3G or TB3S). Not a standalone device.

2. Power Requirements:​ Powered from terminal base. Ensure adequate power supply capacity for adapter and all connected I/O modules, considering field device power requirements.

3. Output Configuration:​ Each channel independently configurable via software for 4-20mA or 0-20mA range. Configuration stored in adapter memory.

4. Load Resistance:​ Verify connected device impedance is within specified range (0-750Ω for 4-20mA, 0-1000Ω for 0-20mA). Exceeding maximum affects output accuracy.

5. Wiring:​ Use twisted, shielded pair cables for analog signals. Ground shield at one end only (typically at the module end).

6. Short Circuit Protection:​ Outputs are protected against short circuits with current limiting and auto-recovery. No fuse replacement required.

7. Environmental Conditions:​ Install in appropriate enclosure for protection. IP20 provides limited protection against dust and moisture.

8. Module Configuration:​ Requires configuration in programming software (Studio 5000, RSLogix 5000) for proper operation. Configure output range and scaling per channel.

9. Channel Density:​ With 12 channels, consider heat dissipation and power requirements, especially when operating all channels at maximum current.

Note: For complete installation guidelines, wiring diagrams, configuration instructions, and detailed technical data, consult the official Allen-Bradley 1794 Series Technical Manual. Always verify the exact model number configuration with the manufacturer, as notation variations may occur.