Product Introduction
The Allen-Bradley 1794-IB8 Flex I/O Digital Input Module offers a cost-effective solution for high-availability industrial control systems. As part of the Flex 1794 series, this module provides eight current sinking inputs with a wide on-state voltage range of 10-31.2V DC. Designed for reliability and modularity, the 1794-IB8 reduces downtime and maintenance costs, making it a smart long-term investment for automation upgrades.
Technical Specifications
| Parameter |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number |
1794-IB8 |
| Product Type |
Flex I/O Digital Input Module |
| Inputs |
8 Current Sinking |
| On-state Voltage (min) |
10V DC |
| On-state Voltage (max) |
31.2V DC |
| On-state Current (min) |
2.0mA |
| On-state Current (max) |
12.0mA |
| Off-state Voltage (max) |
5V DC |
| Off-state Current (max) |
1.5mA |
| Nominal Input Impedance |
4.6 kΩ |
| Flexbus Current |
20mA @ 5V DC |
| Power Dissipation |
3.5W @ 31.2V DC max |
The 1794-IB8 module includes 16 yellow LEDs for per-channel status, and supports ControlNet, DeviceNet, EtherNet/IP, and Universal Remote I/O communication. It operates in 0-55°C ambient temperature with 5-95% noncondensing humidity.
Installation & Setup Guidance
The Allen-Bradley 1794-IB8 mounts directly onto a DIN rail using compatible terminal base units such as the 1794-TB3 or 1794-TB3S. Modules can be inserted or removed under power without disconnecting field wiring, saving time and eliminating system restarts. Ensure the backplane connection is secure and confirm the Flexbus current draw (20mA at 5V DC) does not exceed the power supply capacity.
Compatibility & Integration
This module integrates seamlessly with Rockwell Automation controllers via the Flexbus backplane. Common communication networks include ControlNet, DeviceNet, EtherNet/IP, and Universal Remote I/O. The 1794-IB8 works with 1794 series I/O chassis and is ideal for distributed control architectures. Its standard and XT (extreme temperature) variants offer diagnostic capabilities for demanding environments.
Selection Guide & Purchasing Advice
When selecting the Allen-Bradley 1794-IB8, verify your system's power supply and backplane compatibility. Consider the operating environment: standard modules suit 0-55°C; XT versions handle extreme conditions. For guaranteed authenticity and competitive pricing, purchase from UBEST Automation (ubest101.myshopify.com). We stock genuine Allen-Bradley 1794-IB8 modules with full traceability.