PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1794-ADN is a 24 VDC communication interface adapter for the FLEX I/O system. It interfaces a DeviceNet network to up to eight terminal base units. The module occupies the leftmost position on the mounting rail. It delivers up to 640 mA of 5 VDC power directly to the FlexBus backplane. Diagnostic indicators display module status, network communication health, and input/output operational states.
This adapter operates across communication rates of 125 kbps, 250 kbps, and 500 kbps. Network node addresses range from 00 to 63 via onboard push-button switches. The unit accepts a 24 VDC nominal external power supply with an operating range from 19.2 to 31.2 VDC. It mounts directly onto standard DIN rails or flat panel surfaces in an open enclosure.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Product Line | Flex I/O 1794 |
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| UPC | 612598140169 |
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| Weight | 1.19 lbs (0.54 kg) |
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| Product Description | 1794 DeviceNet Adapter Module |
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| Communication Port | One (1) DeviceNet |
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| Data Transfer speed | 125KB; 250KB; 500KB |
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| Indicators | Mod/Net Status - red/grn; I/O Status - red/grn |
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| Mounting | DIN Rail; Panel Mounting |
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| DeviceNet cable | Belden YR-29832 or equivalent |
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| Wire Size | 12 gauge stranded maximum, 3/64 inch (1.2mm) insulation max. |
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| Operating Temperature | 0 to 55 C (32 to 131 F) |
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| Storage Temperature | -40 to 85 C (-40 to 185 F) |
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| Vibration | Tested 5 g @ 10-500Hz per IEC 68-2-6 |
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| Operating Shock | 30 g peak acceleration, 11(+1)ms pulse width |
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| Voltage | 24 Volts DC |
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| Input Voltage Range | 19.2 to 31.2 Volts DC |
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| Flexbus Output Current | 640 mA maximum 5 Volts DC |
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| Isolation Voltage | 50 Volts Continuous |
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| Power Consumption | 90 mA maximum |
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| Power Dissipation | 7.6W maximum at 19.2 Volts DC |
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| Communication Rate | 125KB-500KB |
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TECHNICAL INFORMATION
Features
- Connects up to eight FLEX I/O modules across a single DeviceNet node.
- Provides automatic communication baud rate detection during initial system power-up.
- Contains dual push-button switches for node address settings from 00 through 63.
- Supplies 640 mA of current at 5 VDC to support connected FlexBus modules.
- Features front-panel LED indicators for module status, network status, and I/O status.
- Supports both standard DIN rail installation and direct panel wall mounting.
TECHNICAL INFORMATION
Applications
- Distributed field I/O connectivity on industrial DeviceNet automation architectures.
- FLEX I/O station integration with Allen-Bradley programmable logic controllers.
- Remote sensor and actuator aggregation across machinery control panels.
TECHNICAL INFORMATION
Connections / Interfaces
- One DeviceNet communication port supporting open 5-pin or 10-pin linear plugs.
- Screw terminals for external 24 VDC user power wiring.
- FlexBus connector interfacing to adjacent terminal base modules.
- Recommended communication media is Belden YR-29832 or an equivalent cable.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module onto a 35 mm DIN rail or directly to a panel wall.
- Position the adapter as the leftmost unit before attaching I/O terminal bases.
- Verify the external 24 VDC power supply handles a 14 A turn-on inrush current.
- Use Category 1 wiring for power lines and Category 2 wiring for communication lines.
TECHNICAL INFORMATION
Configuration Guidelines
- Set the network node address between 00 and 63 using the onboard push-button switches.
- Allow the module to detect network baud rates automatically during power-up cycles.
- Monitor the Mod/Net and I/O status LEDs to verify operational network synchronization.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley FLEX I/O 1794 terminal base units and I/O modules.
- Standard DeviceNet trunk and drop industrial communication networks.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley FLEX I/O 1794 terminal base units and I/O modules. Standard DeviceNet trunk and drop industrial communication networks.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
How many FLEX I/O modules can the 1794-ADN support?
The 1794-ADN supports a maximum of eight FLEX I/O modules in any combination on a single rail.
How is the DeviceNet node address set on the 1794-ADN?
The node address is set from 00 to 63 using the plus and minus push-button switches on the module face.
What is the reference price for an Allen-Bradley 1794-ADN module?
Observed market reference pricing is approximately $72.00. This is an indicative reference price only and not a final quotation.
