Product Overview
The Allen-Bradley 1794-IE12 is a high-density analog input module from the Flex I/O product family. Designed for industrial automation, this module interfaces with analog devices such as transmitters, indicators, recorders, and single-loop or multi-loop controllers. Its compact form factor and robust performance make it a reliable choice for demanding applications.
Technical Specifications Breakdown
Key parameters for the 1794-IE12 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Number of Inputs | 12 Single-ended |
| Input Types | 0 to 20 mA; 4 to 20 mA; +/- 10VDC; 0 to 10 VDC |
| Conversion Type | Successive Approximation |
| Resolution | 16 bit 2’s complement, left justified Voltage: 320 μV/cnt Current: 0.641 μA/cnt |
| Absolute Accuracy | 0.1% full scale @ 25 °C |
| External DC Supply Range | 10.0…31.2V DC (includes 5% AC ripple) |
| FlexBus Current | 80 mA |
| Power Dissipation | 1.2W @ 31.2V DC max. |
| Thermal Dissipation | 4.1 BTU/hr. @ 31.2V DC max. |
| Operating Temperature | 0 to 55 C (32 to 131 F) |
| Storage Temperature | –40…85 °C (–40…185 °F) |
| Vibration | 5g @ 10 to 500 Hz |
| Operating Shock | 30 g |
| Indicators | 1 green/red power/status indicator |
Industry Applications
Typical applications include:
- Chemical Processing: Monitoring pressure and flow transmitters with 4-20 mA loops, leveraging the 0.1% full-scale accuracy for precise control.
- Manufacturing Lines: Reading temperature and level sensors using ±10VDC inputs, with the 8.0 ms conversion rate enabling fast data acquisition.
- Water Treatment: Integrating with multi-loop controllers for pH and conductivity measurement, benefiting from the 16-bit resolution and low drift.
Installation & Setup Guidance
Install the 1794-IE12 onto a compatible terminal base such as the 1794-TB3G or 1794-TB3GS. Ensure the keyswitch position is set to 3 to prevent incorrect module insertion. Mount the assembly on a DIN rail and connect the external DC supply within the 10.0 to 31.2V DC range. Wire analog devices according to the terminal base specifications, using appropriate wire sizes as determined by the base. The module's single-ended inputs require careful grounding to minimize noise.
Maintenance & Reliability
Periodically inspect the module for dust accumulation and ensure the operating temperature stays within 0 to 55 °C. The LED indicator provides quick status checks: green for normal operation, red for faults. Given the 50V continuous isolation voltage, avoid exposing the module to excessive electrical stress. The open-type enclosure requires installation in a clean, dry environment.
Compatibility & Integration
The 1794-IE12 is designed for use with Flex I/O communication adapters and terminal bases 1794-TB3G or 1794-TB3GS. The module draws 80 mA from the FlexBus, ensuring low power consumption.
Selection Guide & Purchasing Advice
When selecting the 1794-IE12, verify compatibility with your existing Flex I/O adapter and terminal base. AutoDCSTech offers this module with detailed specifications to support your automation needs. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Availability & Condition at AutoDCSTech
| Part Number | 1794-IE12 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
