The Allen-Bradley 1794-OB8 delivers eight reliable sourcing outputs for your distributed control system. This Flex I/O module provides a nominal 24V DC on-state voltage for demanding industrial applications. You can install or remove this module under power without restarting the system. This hot-swap capability dramatically reduces downtime during maintenance procedures. The module connects directly to the terminal base unit for secure field wiring.
Expert Technical Evaluation & Performance Review
This module draws only 60mA from the FlexBus at 5V DC for efficient operation. The 1794-OB8 achieves a maximum power dissipation of just 3.3W at 31.2V DC. This low thermal output allows for dense panel layouts without overheating concerns. The module switches outputs from off to on in only 0.5ms. It switches from on to off in a maximum of 1ms for precise control.
Each of the eight channels delivers a maximum on-state current of 500mA. The module maintains an on-state voltage drop of less than 0.5V DC for efficient power delivery. The off-state leakage current stays below 0.5mA to prevent false actuator signals. The module provides continuous isolation voltage of 50V between channels.
You can operate this module within a temperature range of 0 to 55 degrees Celsius. It handles relative humidity levels from 5 to 95 percent without condensation. The module supports multiple communication protocols including ControlNet and DeviceNet. It also works with EtherNet/IP and Universal Remote I/O networks.
Product Procurement & Buyer Guide
This module requires a compatible terminal base unit for proper operation. You must use the 1794-TB3, 1794-TB3S, or 1794-TBKD terminal base units. The 1794-TB3 terminal base provides 52 screw clamp terminals for secure wiring. It supports daisy-chaining to nearby modules for simplified system wiring.
The external power supply must provide 10 to 31.2V DC with less than 5 percent AC ripple. This supply must deliver between 10 and 35mA of current for reliable module operation. The module snaps directly onto a standard DIN rail for quick mechanical installation. You can find XT versions of this module for extreme environmental conditions.
Sixteen yellow LED indicators on the module show the status of each channel. These indicators provide immediate visual feedback for both input devices and output signals. The module has received safety ratings for both European and North American hazardous locations. This certification makes it suitable for use in explosive or volatile industrial environments.
Logistics & Standard Packaging Details
- One Allen-Bradley 1794-OB8 Flex I/O Digital DC Output Module
- Product documentation and installation guide
- Anti-static packaging for safe transportation
- Express delivery shipping available via FedEx, UPS, and DHL
