PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1794-IA8I is an 8-point isolated digital input module for the FLEX I/O platform. This module mounts directly onto a compatible terminal base unit. Field wiring connects to the terminal base rather than the module itself. This mechanical arrangement allows module removal and insertion under power without disturbing field terminations. Such hot-swap capability minimizes system interruptions during maintenance routines.
The 1794-IA8I interfaces isolated alternating-current field devices to a programmable automation controller. Common applications include monitoring motor control centers and control transformers. Each of the eight channels operates at a nominal voltage of 120V AC. The hardware accepts an on-state operating range between 65V AC and 132V AC. Communication adapters link the rack to EtherNet/IP, ControlNet, DeviceNet, or Universal Remote I/O networks.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Product Line | Flex I/O 1794 |
|---|
| UPC | 612598179923 |
|---|
| Weight | 0.56 lbs (0.26 kg) |
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| Inputs | 8 Isolated |
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| On-state Voltage min. | 65V AC |
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| On-state Voltage max. | 132V AC |
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| On-state Current min. | 7.1mA |
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| On-state Current max. | 14.32mA |
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| Off-state Voltage max. | 43V AC |
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| Off-state Current min. | 2.9mA |
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| Nominal Input Current | 12 mA @ 120V AC |
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| Flexbus Current | 30mA @ 5V DC |
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| Power Dissipation | 4.5W @ 132V AC max. |
|---|
TECHNICAL INFORMATION
Features
- Provides eight individually isolated AC input channels.
- Supports removal and insertion under power when installed on a terminal base.
- Contains 16 yellow LED indicators to display channel status.
- Features hardware input filter times of 8.4 ms off-to-on and 26.4 ms on-to-off.
- Draws 30 mA Flexbus current at 5V DC.
TECHNICAL INFORMATION
Applications
- Motor control centers.
- Control transformers.
- Distributed digital AC input sensing across industrial networks.
TECHNICAL INFORMATION
Connections / Interfaces
- Connects to the backplane via FLEX I/O terminal base units.
- Supports communication over ControlNet, DeviceNet, EtherNet/IP, and Universal Remote I/O through system adapters.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the supporting terminal base unit directly onto a standard DIN rail.
- Ensure the terminal base locking mechanism is secure before snapping the module into place.
- Maintain ambient operating temperatures between 0 and 55 degrees Celsius.
- Operate within noncondensing relative humidity levels between 5 and 95 percent.
TECHNICAL INFORMATION
Compatibility
- Mounts to terminal base units including 1794-TBN, 1794-TB2, 1794-TB3, 1794-TB3S, and 1794-TBKD.
- Operates with FLEX I/O communication adapters for EtherNet/IP, ControlNet, DeviceNet, and Universal Remote I/O.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSMounts to terminal base units including 1794-TBN, 1794-TB2, 1794-TB3, 1794-TB3S, and 1794-TBKD. Operates with FLEX I/O communication adapters for EtherNet/IP, ControlNet, DeviceNet, and Universal Remote I/O.
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
What terminal bases work with the 1794-IA8I module?
The 1794-IA8I module is compatible with terminal base units 1794-TBN, 1794-TB2, 1794-TB3, 1794-TB3S, and 1794-TBKD.
Can the 1794-IA8I be replaced while the system is powered?
Yes. The module supports removal and insertion under power because field wiring connects directly to the separate terminal base.
What is the reference price for an Allen-Bradley 1794-IA8I?
Observed market reference pricing is approximately 198.00 USD for refurbished units. This figure is an indicative market reference only and not a final quotation.
