The Allen Bradley 1794-IE8 is a FLEX I/O analog input module designed to provide 8 single-ended input channels for acquiring voltage and current signals in distributed industrial automation systems. It is widely used in process control and machine automation applications where accurate measurement of analog field signals is required in a compact and modular I/O architecture.
The module supports standard industrial signal ranges such as 0–10V, ±10V, 0–20 mA, and 4–20 mA, making it highly flexible for integration with transmitters, sensors, and instrumentation devices.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Model Number | 1794-IE8 |
| Product Family | FLEX I/O |
| Module Type | Analog Input Module |
| Input Channels | 8 single-ended, non-isolated inputs |
| Input Signal Types | 0–10V, ±10V, 0–20 mA, 4–20 mA |
| Resolution | 12-bit (unipolar), 11-bit (bipolar) |
| Conversion Method | Successive approximation |
| Conversion Rate | ~256 µs (all channels) |
| Input Impedance | High impedance (voltage), low impedance (current loop) |
| Accuracy | ~0.2% full scale at 25°C |
| Backplane Power | 5V DC via FLEX I/O system |
| Field Power Supply | 24V DC (10–31.2V DC operating range) |
| FlexBus Current Draw | ~20 mA |
| Power Dissipation | ~3 W maximum |
| Isolation Voltage | Tested up to ~850V DC (field-to-system) |
| Channel Isolation | No channel-to-channel isolation |
| Diagnostics | Module status LED indicator |
| Compatible Terminal Bases | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T |
| Mounting Type | DIN rail FLEX I/O base system |
| Operating Temperature | 0°C to 55°C |
| Protection Class | IP20 |
Physical Dimensions & Weight (L × W × H Combined)
| Parameter | Specification |
|---|---|
| Dimensions (L × W × H) | 94 × 45.7 × 53.3 mm |
| Weight | Approx. 0.10–0.20 kg |
Recommended Related Models
The 1794-IE8 is commonly used alongside other FLEX I/O modules to build scalable analog and mixed-signal control systems.
| Related Model | Description |
|---|---|
| 1794-IE12 | 12-channel analog input module |
| 1794-OE4 | Analog output module |
| 1794-IB16 | Digital input module |
| 1794-OB16 | Digital output module |
| 1794-IE4XOE2 | Mixed analog I/O module |
| 1794-IA16 | AC input module |
| 1794-TB3 | Terminal base unit |
| 1794-AENT | EtherNet/IP adapter |
| 1794-AENTR | Redundant EtherNet/IP adapter |
| 1794-ACN15 | ControlNet adapter |
Popular Allen Bradley Automation Products
Allen Bradley FLEX I/O systems are widely deployed due to their modular scalability, long lifecycle support, and strong integration with Rockwell Logix controllers.
| Popular Model | Product Category |
|---|---|
| 1756-L85E | ControlLogix Controller |
| 1769-L36ERM | CompactLogix Controller |
| 5069-IF8 | Analog Input Module |
| 2711P-T12C4D8 | PanelView HMI |
| 20G11NC072AA0NNNNN | PowerFlex 755 Drive |
| 1734-AENTR | POINT I/O Adapter |
| 1606-XLS240E | Industrial Power Supply |
| 1756-EN2TR | EtherNet/IP Communication Module |
| 1794-IE12 | FLEX Analog Input Module |
| 25B-D013N114 | PowerFlex 525 Drive |
