PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1794-OA16 is a FLEX I/O 16-channel digital output module designed for 120V AC applications. It delivers an operational voltage range between 74V AC and 132V AC across 47 to 63 Hz line frequencies. The module provides sixteen non-isolated outputs capable of handling a collective current capacity of 4.0 A. Each individual channel supports up to 500 mA load current at 55 degrees Celsius. It interfaces with any compatible FLEX I/O communication adapter across distributed control architectures.
Engineered for compact DIN rail installations, this open-type unit requires an external terminal base for field wiring. The module draws 80 mA of backplane current at 5V DC from the Flexbus. Operating dissipation reaches 4.7 W maximum with a thermal rating of 16.1 BTU per hour. Sixteen yellow status indicators provide direct front-panel diagnostic feedback for point status. Integrated protection permits repeated 7 A surge currents for 40 ms cycles under inductive load switching.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Product Line | Flex I/O 1794 |
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| UPC | 612598179947 |
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| Weight | 0.56 lbs (0.26 kg) |
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| Product Description | Flex IO AC Output Module |
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| Number of Outputs | 16, non-isolated |
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| Terminal base | 1794-TBN, 1794-TBNF, 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD, 1794-TBNK, 1794-TBNFK, 1794-TB3K, 1794-TB3SK. |
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| ON state Voltage, min | 74VAC |
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| ON state Voltage, max. | 120VAC |
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| ON state Voltage, nom | 132VAC |
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| Pilot duty rating | 5A inrush |
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| External AC Power supply | 120 VAC |
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| Indicators | 16 Yellow status indicators |
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| Keyswitch position | 8 |
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| Enclosure | Open-type |
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| Mounting | DIN Rail |
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| Wire Size | Determined by installed terminal base |
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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 | 5g @ 10 to 500 Hz |
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| Outputs | 16 Nonisolated |
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| Output Voltage nom. | 120 Volts AC |
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| Output Current Rating | 4.0 Amps |
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| On-state Current min. | 5 mA per Output |
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| On-state Voltage Drop max. | 1.5 Volts AC at 0.5 Amps |
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| Off-state Leakage Current max. | 2.25 mA |
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| Isolation Voltage | 120 Volts Continuous |
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| Flexbus Current | 80 mA at 5 Volts DC |
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| Power Dissipation | 4.7 W at 0.5 Amps maximum |
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| Thermal Dissipation | 16.1 BTU/hour at 0.5 Amps maximum |
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TECHNICAL INFORMATION
Features
- Sixteen non-isolated 120V AC digital solid-state output points.
- Output operational voltage window spanning 74 to 132V AC at 47 to 63 Hz.
- Total module current capacity of 4.0 A across all active channels.
- Surge current withstand capacity of 7 A for 40 ms durations.
- Maximum signal switching delay restricted to one half cycle.
- Sixteen front-facing yellow status LED indicators for channel monitoring.
- Low Flexbus backplane current consumption of 80 mA at 5V DC.
- Keyswitch position 8 prevents incorrect base mechanical alignment.
TECHNICAL INFORMATION
Applications
- Actuating 120V AC industrial solenoid valves and process actuators.
- Energizing interposing relay coils and industrial motor contactor circuits.
- Switching control panel pilot lights and audible alarm buzzers.
TECHNICAL INFORMATION
Connections / Interfaces
- Compatible terminal bases include 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBKD, and 1794-TBN.
- Spring-clamp and knife-disconnect terminal options available via base selection.
- Auxiliary terminal blocks required with 1794-TBN bases to route individual AC common connections.
- Direct backplane edge connector for low-voltage signal coupling to the terminal base.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module onto an approved FLEX I/O terminal base secured to a DIN rail.
- Set the base mechanical keyswitch to position 8 prior to module insertion.
- Maintain ambient operating temperatures between 0 and 55 degrees Celsius within the enclosure.
- Provide external fusing when utilizing terminal base units without built-in fuse provisions.
- Ensure adequate panel clearances for natural convection to dissipate thermal loads.
TECHNICAL INFORMATION
Configuration Guidelines
- Assign the 16 output bits within the host controller output image table.
- Select appropriate communications adapter parameters to match system Flexbus update scan rates.
- Confirm that load inrush values do not exceed the 7 A peak surge limits.
TECHNICAL INFORMATION
Compatibility
- Integrates with all Allen-Bradley FLEX I/O network communication adapters.
- Mounts to 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TBNF, and spring-clamp variants.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSIntegrates with all Allen-Bradley FLEX I/O network communication adapters. Mounts to 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TBNF, and spring-clamp variants.
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 is the continuous current rating of the 1794-OA16 module?
The total module rating is 4.0 A, with individual outputs supporting up to 500 mA at 55 °C.
Does the 1794-OA16 provide channel-to-channel electrical isolation?
No. The 16 output channels share common circuit references and are non-isolated from each other.
What terminal base units are approved for use with this module?
It installs on 1794-TBN, 1794-TBNF, 1794-TB2, 1794-TB3, 1794-TB3S, and related spring-clamp bases.
What is the market pricing for the Allen-Bradley 1794-OA16?
Observed market reference pricing is approximately $322.00 USD. This figure is an indicative benchmark, not a final quote.
