The Allen Bradley 1794-IE8H is a FLEX I/O 8-point analog input module designed for high-accuracy measurement of industrial process signals with integrated HART communication capability. It is widely used in process automation systems where detailed diagnostics, smart transmitter integration, and reliable analog signal acquisition are required.
This module supports single-ended analog inputs and is commonly deployed in oil & gas, chemical processing, power generation, and other continuous process industries where instrumentation-level visibility and field device intelligence are critical.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Model Number | 1794-IE8H |
| Product Family | FLEX I/O |
| Module Type | HART Analog Input Module |
| Input Channels | 8 single-ended inputs |
| Input Signal Types | 0–20 mA, 4–20 mA |
| HART Support | Yes (digital communication over analog loop) |
| Resolution | 16-bit high-resolution measurement |
| Accuracy | ~0.1% full scale (typical at 20°C) |
| Conversion Method | Successive approximation |
| Input Configuration | Non-isolated channels |
| Loop Power | External 24V DC field supply required |
| FlexBus Current | ~80 mA |
| Power Dissipation | ~3.5–4 W |
| Isolation Voltage | ~50V continuous field-to-backplane |
| Diagnostics | Channel-level status + HART device diagnostics |
| Terminal Base | 1794-TB3G / 1794-TB3GS |
| Mounting Type | FLEX I/O DIN rail system |
| Operating Temperature | -20°C to 55°C |
| Protection Class | IP20 |
Physical Dimensions & Weight (L × W × H Combined)
| Parameter | Specification |
|---|---|
| Dimensions (L × W × H) | Approx. 94 × 69 × 69 mm |
| Weight | Approx. 1.7 kg (varies by revision) |
Recommended Related Models
The 1794-IE8H is typically used in advanced process control systems alongside other FLEX analog and communication modules.
| Related Model | Description |
|---|---|
| 1794-IE8 | Standard 8-point analog input module |
| 1794-IE12 | 12-point analog input module |
| 1794-OE4 | Analog output module |
| 1794-IB16 | Digital input module |
| 1794-OB16 | Digital output module |
| 1794-AENT | EtherNet/IP adapter |
| 1794-AENTR | Redundant EtherNet/IP adapter |
| 1794-ACN15 | ControlNet adapter |
| 1794-TB3G | Terminal base unit |
| 1794-IF8IH | Replacement model (engineering successor) |
Popular Allen Bradley Automation Products
Allen Bradley FLEX I/O and Logix platforms are widely used in industrial automation due to reliability, scalability, and deep integration with process control systems.
| Popular Model | Product Category |
|---|---|
| 1756-L85E | ControlLogix Controller |
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| 1734-AENTR | POINT I/O Adapter |
| 1606-XLS240E | Industrial Power Supply |
| 1756-EN2TR | EtherNet/IP Communication Module |
| 1794-IE8 | FLEX Analog Input Module |
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