The Allen Bradley 1794-IF8IH is a FLEX I/O HART-enabled isolated analog input module designed for advanced process control systems requiring high-accuracy signal acquisition and intelligent field device communication. With 8 isolated analog input channels and integrated HART protocol support, this module enables both standard analog data collection and enhanced transmitter diagnostics from smart instrumentation devices.
Engineered for process-intensive industries, the 1794-IF8IH delivers reliable performance in distributed automation architectures where precision, noise immunity, and field-level visibility are essential. It is widely used in oil & gas, chemical processing, utilities, and industrial manufacturing systems requiring stable analog monitoring and advanced instrumentation integration.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Model Number | 1794-IF8IH |
| Product Family | FLEX I/O |
| Module Type | HART Isolated Analog Input Module |
| Input Channels | 8 isolated single-ended analog inputs |
| Supported Signals | 4–20 mA, 0–20 mA, voltage/current analog signals |
| HART Compatibility | Yes |
| Resolution | 16-bit unipolar, 15-bit bipolar + sign |
| Conversion Method | Sigma-Delta conversion |
| Input Configuration | Isolated analog inputs |
| FlexBus Current Draw | Approx. 80 mA @ 5V DC |
| External Power Supply | 19.2–31.2V DC |
| Power Dissipation | Approx. 4.8 W maximum |
| Thermal Dissipation | Approx. 16.4 BTU/hr |
| Diagnostics | Channel diagnostics and HART device communication |
| Calibration | Factory calibrated, field calibration supported |
| Compatible Terminal Bases | 1794-TB3, 1794-TB3S |
| Mounting Type | DIN rail FLEX I/O system |
| Operating Temperature | 0°C to 55°C |
| Protection Class | IP20 open-style enclosure |
| Certifications | Hazardous location approvals supported |
Technical specifications verified from multiple industrial automation references.
Physical Dimensions & Weight (L × W × H Combined)
| Parameter | Specification |
|---|---|
| Dimensions (L × W × H) | 94 × 94 × 66 mm |
| Weight | Approx. 0.26 kg |
Dimension and weight references sourced from industrial product databases.
Recommended Related Models
The 1794-IF8IH is commonly integrated with FLEX I/O communication adapters and complementary analog modules for scalable process automation systems.
| Related Model | Description |
|---|---|
| 1794-IE8H | Previous-generation HART analog input module |
| 1794-OF8IH | HART analog output module |
| 1794-IE8 | Standard analog input module |
| 1794-IE12 | 12-channel analog input module |
| 1794-IF4I | Isolated analog input module |
| 1794-IF2XOF2I | Isolated analog combo module |
| 1794-AENT | EtherNet/IP adapter |
| 1794-AENTR | Redundant EtherNet/IP adapter |
| 1794-ACN15 | ControlNet adapter |
| 1794-TB3S | FLEX terminal base |
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