Product Summary
The Allen-Bradley 1794-IE12 is a high-density analog input module for the Flex I/O platform. It provides twelve single-ended channels for voltage or current signals. This module delivers precise data with 16-bit resolution and a fast 8.0 ms conversion rate. It is an ideal solution for interfacing with transmitters and controllers in demanding industrial environments.
Expert Technical Evaluation & Performance Review
Precision Signal Acquisition and Resolution
The 1794-IE12 module uses successive approximation for analog-to-digital conversion. It offers a 16-bit resolution left justified in a 2’s complement format. For voltage inputs, the module provides a resolution of 320 µV per count. For current inputs, the resolution is 0.641 µA per count. This high resolution ensures accurate measurement of fine signal changes. The module achieves an absolute accuracy of 0.1% of full scale at 25 degrees Celsius. Its accuracy drift remains low at just 0.004% of full scale per degree Celsius. This stability maintains precision across varying thermal conditions in your control cabinet.
Robust Environmental and Mechanical Tolerances
This module withstands harsh industrial conditions with an operating temperature range from -20 to 60 degrees Celsius. It handles storage temperatures from -40 to 85 degrees Celsius. The 1794-IE12 resists operating vibration of 5 g at 10 to 500 Hertz. It survives operating shock of 30 g and non-operating shock of 50 g. These ratings make it suitable for mounting on machinery or in high-vibration areas. The module requires a 1794-TB3G or 1794-TB3GS terminal base for installation. A keyswitch position of 3 prevents incorrect module installation. The module’s power dissipation is only 1.2 W at 31.2 Volts DC. Its thermal dissipation is a low 4.1 BTU per hour at the same voltage. This efficiency reduces heat buildup in dense I/O panels.
Dynamic Response and Signal Processing Capabilities
The input step response for the 1794-IE12 is 1.3 seconds for both current and voltage inputs. When using the Quick Step feature, this response time drops to just 0.09 seconds. This fast response allows the module to capture rapid signal changes effectively. The module features an 8.0 ms conversion rate for all twelve channels simultaneously. This speed supports high-throughput data acquisition for control loops. The module accepts input types including 0 to 20 mA, 4 to 20 mA, ±10 VDC, and 0 to 10 VDC. This flexibility lets you connect various analog field devices directly. Note there is no isolation between individual channels. This design simplifies wiring but requires careful grounding practices.
Logistics & Standard Packaging Details
- One Allen-Bradley 1794-IE12 Flex I/O Analog Input Module
- Installation and configuration guide
- Product is shipped in an anti-static protective package
- Express shipping is available via FedEx, UPS, and DHL
