The Allen Bradley 1794-IB8 is a FLEX I/O 8-point digital input module designed for reliable 24V DC signal acquisition in distributed industrial automation systems. Built for compact machine control and modular I/O architectures, this module provides stable monitoring of field devices such as proximity sensors, push buttons, photoelectric sensors, and auxiliary contacts.
Its compact footprint, flexible network compatibility, and proven industrial reliability make the 1794-IB8 a popular choice for OEM machinery, manufacturing systems, and process automation applications where efficient digital input handling is essential.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Model Number | 1794-IB8 |
| Product Family | FLEX I/O |
| Module Type | Digital Input Module |
| Input Channels | 8 sinking digital inputs |
| Nominal Input Voltage | 24V DC |
| Operating Voltage Range | 10–31.2V DC |
| ON-State Voltage | 10–31.2V DC |
| OFF-State Voltage | Max 5V DC |
| ON-State Current | 2–12 mA |
| OFF-State Current | Max 1.5 mA |
| Input Impedance | 4.6 kΩ |
| FlexBus Current Draw | Approx. 20 mA @ 5V DC |
| Power Dissipation | Max 3.5 W |
| Isolation Voltage | 50V continuous; tested at 850V DC for 60 seconds |
| Channel Isolation | No isolation between individual channels |
| Status Indicators | Individual channel LED indicators |
| Compatible Terminal Bases | 1794-TB3, 1794-TB3S, 1794-TB3K |
| Mounting Type | DIN rail |
| Operating Temperature | 0°C to 55°C |
| Protection Rating | IP20 |
Physical Dimensions & Weight (L × W × H Combined)
| Parameter | Specification |
|---|---|
| Dimensions (L × W × H) | Approx. 100 × 63 × 54 mm |
| Weight | Approx. 0.10 kg |
Recommended Related Models
The 1794-IB8 is commonly used with FLEX I/O communication adapters and complementary digital/analog modules for scalable distributed automation systems.
| Related Model | Description |
|---|---|
| 1794-OB8 | 8-point digital output module |
| 1794-IB16 | 16-point digital input module |
| 1794-OB16 | 16-point digital output module |
| 1794-IA8 | AC digital input module |
| 1794-IE8 | Analog input module |
| 1794-OE4 | Analog output module |
| 1794-TB3 | FLEX terminal base unit |
| 1794-AENT | EtherNet/IP adapter |
| 1794-AENTR | Redundant EtherNet/IP adapter |
| 1794-ASB | Remote I/O adapter |
Popular Allen Bradley Models
Allen Bradley FLEX I/O products are widely trusted for modular scalability, industrial durability, and long-term automation support.
| Popular Model | Product Category |
|---|---|
| 1756-L85E | ControlLogix Controller |
| 1769-L36ERM | CompactLogix Controller |
| 5069-IF8 | Analog Input Module |
| 2711P-T12C4D8 | PanelView Plus HMI |
| 20G11NC072AA0NNNNN | PowerFlex 755 Drive |
| 1734-AENTR | POINT I/O EtherNet/IP Adapter |
| 1606-XLS240E | Industrial Power Supply |
| 1756-EN2TR | EtherNet/IP Communication Module |
| 1794-IE8 | FLEX Analog Input Module |
| 25B-D013N114 | PowerFlex 525 Drive |
