Product Summary
The Allen-Bradley 1794-IA8 Flex I/O module delivers eight discrete AC inputs for your control system. This module converts 120V AC signals into logic levels for a processor. It provides reliable signal acquisition in a compact, open-style enclosure.
Product Procurement & Buyer Guide
Engineers and procurement managers need a module that delivers consistent performance. The 1794-IA8 meets these demands with eight non-isolated inputs. Each input accepts voltages from 65V AC up to 132V AC. This wide range ensures stable operation even with fluctuating line power.
The module draws only 30mA from the FlexBus at 5V DC. Its maximum power dissipation is just 4.5W at 132V AC. This low power consumption reduces heat buildup inside your control panel. The module weighs only 0.25 lbs, making it easy to handle during installation.
You must pair this module with a compatible terminal base unit. Acceptable bases include the 1794-TB3, 1794-TBN, and 1794-TB3K. These bases provide the physical connection for field wiring. The module uses 22 to 12 AWG stranded copper wire for secure terminations.
The module operates reliably in harsh industrial environments. It functions within a temperature range of -20 to 55 degrees Celsius. It also withstands operating vibration of 5g at 10 to 500 Hertz. This rugged design ensures long service life in demanding applications.
The 1794-IA8 features eight yellow status indicators for quick diagnostics. These LEDs show the on/off state of each input channel. This visual feedback helps technicians troubleshoot wiring issues rapidly. The module also supports multiple communication interfaces like DeviceNet and EtherNet/IP.
Step-by-Step User & Installation Guide
Proper installation ensures the module performs as specified. First, mount the terminal base unit onto a DIN rail. Position the base at a slight angle and hook it over the top of the rail. Push the base down until it locks securely into place.
Next, attach the 1794-IA8 module to the terminal base. Slide the module onto the base until the FlexBus connector engages fully. Ensure the module sits flush against the adjacent adapter. The module has eight key switch positions for correct alignment.
Wire the field devices to the terminal base using the correct terminals. The module operates with a nominal voltage of 120V AC at 60 Hertz. The on-state current ranges from 7.1mA to 14.32mA. The off-state voltage must not exceed 43V AC.
The module’s default filter time from OFF to ON is 8.4 milliseconds. The filter time from ON to OFF is 26.4 milliseconds. These filter times help debounce noisy AC signals. Always use stranded copper wire between 22 and 12 AWG for connections.
The module provides an isolation voltage of 2150V DC between the system and the user. This isolation protects personnel from electrical shock. The module has an IP20 rating, so install it inside a suitable enclosure. Do not expose the module to condensing humidity.
Logistics & Standard Packaging Details
- One Allen-Bradley 1794-IA8 Flex I/O module
- Product documentation and installation guide
- Static-safe packaging for secure transport
- Express delivery shipping available via FedEx, UPS, and DHL
