Overview of the Allen-Bradley 1794-ADN Module
The 1794-ADN DeviceNet adapter acts as a vital communication bridge.
It links your Flex I/O rack to a central DeviceNet scanner.
This module allows for fast and reliable I/O data exchange in your system.
It supports up to eight Flex I/O modules in any combination you need.
Engineers use it for its robust and flexible design in harsh environments.
Theme Selection: Product Buyer Guide & Installation Guide
Why Your System Needs the 1794-ADN Adapter
Procurement managers choose this module for its proven industrial reliability.
The 1794-ADN operates with a nominal 24 Volts DC power supply.
It accepts an input voltage range of 19.2 to 31.2 Volts DC.
This range includes a 5% AC ripple for stable performance.
The module consumes a maximum of 90 mA from its DeviceNet power.
It provides a FlexBus output current of 640 mA at 5 Volts DC.
This ensures your I/O modules receive sufficient power for operation.
The module measures just 3.7 x 3.6 x 3.4 inches for easy placement.
It operates reliably in temperatures from 0 to 55 C.
Storage temperatures range from -40 to 85 C for long shelf life.
It withstands 5 g vibration from 10 to 500 Hz per IEC standards.
The device handles 30 g peak acceleration during operational shock.
Step-by-Step Guide for Installing the 1794-ADN
Begin by mounting the 1794-ADN on a DIN rail or directly on a panel.
It always sits as the leftmost module in your Flex I/O rack.
Use the built-in thumbwheel switches to set the module's address.
Valid network address settings range from 00 to 63 for your system.
The module detects the baud rate automatically during its power-up cycle.
It supports data rates of 125 KB, 250 KB, and 500 KB seamlessly.
Use Cat 1 wire for power ports and Cat 2 wire for communication.
For the DeviceNet cable, use Belden YR-29832 or a reliable equivalent.
The maximum wire size is 12 gauge stranded with 3/64 inch insulation.
Connect the module to your system using an open 5-pin linear plug.
Critical Technical Specifications for Engineers
The 1794-ADN provides one single DeviceNet communication port for connections.
Status LED indicators show Mod/Net and I/O status in red or green.
This allows operators to quickly monitor module operation and troubleshoot issues.
The module has been type-tested at 1,930 Volts DC for 60 seconds.
Its continuous isolation voltage is rated at 50 Volts for safe operation.
Maximum power dissipation is 7.6 Watts at the low end of 19.2 Volts DC.
Thermal dissipation is 26 BTU per hour at that same voltage level.
The power supply must deliver a 14A inrush surge for 5 milliseconds.
