Product Procurement & Buyer Guide
The 1794-ADN is a Rockwell Automation DeviceNet communication adapter. It connects a 1794 Flex I/O rack to a DeviceNet scanner. This module supports up to eight Flex I/O modules of any combination. You need a 24V DC power supply with a 19.2–31.2V DC range and 400 mA capacity. The module draws a maximum of 90 mA on the DeviceNet power. It provides a FlexBus output current of 640 mA at 5V DC.
Critical Cable Selection
Use Belden YR-29832 or an equivalent DeviceNet cable. The wire size must be 12 gauge stranded maximum with 3/64 inch (1.2mm) insulation. This cable ensures reliable communication at data rates of 125 KB, 250 KB, or 500 KB. The module auto-detects the baud rate during power-up.
Mounting and Wiring
Mount the 1794-ADN on a DIN rail or directly on a panel. It is the leftmost module in the Flex I/O rack. Power ports require Category 1 wire, while communication ports need Category 2 wire. Use an open 5‑pin or 10‑pin linear plug for the DeviceNet port. The module measures 3.7 x 3.6 x 3.4 inches and weighs 0.38 lbs.
Expert Technical Evaluation & Performance Review
Environmental Tolerances
The 1794-ADN operates in temperatures from 0 to 55 °C (32 to 131 °F) and stores from -40 to 85 °C (-40 to 185 °F). It withstands vibration of 5 g at 10–500 Hz per IEC 68‑2‑6 and operating shock of 30 g peak acceleration. This ruggedness suits harsh industrial floors.
Electrical Isolation and Power
The module has continuous isolation voltage of 50V DC. It was type-tested at 1,930V DC for 60 seconds. Maximum power dissipation is 7.6W at 19.2V DC, with thermal dissipation of 26 BTU/hour. The power supply must provide a turn-on inrush surge current of 14A for 5 ms.
Status Indication and Configuration
Operators monitor Mod/Net and I/O status via red/green LED indicators. Set the module address 00–63 using the built-in thumbwheel switches. Adjustments use minus (-) and plus (+) buttons. The baud rate automatically detects during power-up. This simplifies installation and troubleshooting.
1794-ADN ensures robust data exchange between your DeviceNet scanner and Flex I/O modules. Its high isolation and wide temperature range reduce maintenance needs in demanding applications.
Logistics & Standard Packaging Details
Express shipping is available via FedEx, UPS, and DHL to meet urgent project timelines.
