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1794-OA8

Revisions: Ser A

Description:   The Allen-Bradley 1794-OA8 Flex I/O Digital Output Module has 8 Nonisolated Outputs, a 120V AC Output Voltage nom., and a 4.0A Output Current Rating. It also operates with a 1.0V @ 0.5A max. On-state Voltage Drop max. and a 2.25mA Off-state Leakage Current max..

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About 1794-OA8

The Allen-Bradley 1794-OA8 is a FLEX I/O AC digital output module. It comes with 8 non-isolated outputs in a group. This module can diagnose problems with I/O field devices, wiring, and the power supply. It can also reduce the start-up time and the time spent finding and fixing failures. The 1794-OA8 can be installed directly on the following terminal base units: the 1794-TBNK, 1794-TBKD, 1794-TB3K, 1794-TBNFK, 1794-TB3SK, 1794-TBNF, 1794-TB3, 1794-TB2, 1794-TB3S, and the 1794-TBN. Note that it is necessary to use auxiliary terminal strips if the 1794-TBN is the selected base unit.

This 120 Volts AC module has an output voltage range of 85 to 132 Volts AC and an output current rating of 4 Amps with the 8 outputs at 500 mA. The module has a maximum on-state voltage drop of 1 Volt at 0.5 Amps and a maximum off-state leakage current of 2.25 mA. Its minimum on-state current is 5 mA per output, while the on-state maximum current is dependent on its temperature; at 55 degrees Celsius, it is 500 mA per output, it is 750 mA at 35 degrees Celsius, which is per output, and it is 500 mA on 4 outputs and 1 Amp on 4 non-adjacent outputs at 30 degrees Celsius. The 1794-OA8’s FlexBus current is 80 mA at 5 Volts DC. The isolation voltage of the 1794-OA8 is continuous at 120 Volts. It also has a surge current of 7 Amps for 40 milliseconds, which is repeatable every 8 seconds. It has an output signal delay of a maximum of 1/2 cycle for both the ON to OFF and the OFF to ON states. The maximum power dissipation for the 1794-OA8 is 4.1 W at 0.5 Amps and 6.3 W both at 0.75 Amps and 1 Amp. The maximum thermal dissipation is 14 BTU/hour at 0.5 Amps, 21.2 BTU/hour at 0.75 Amps, and 21.4 BTU/hour at 1 Amps.

Technical specifications:

Manufacturer:Rockwell Automation
Part Number/Catalog No.:1794-OA8
Product Type:Flex I/O Digital Output Module
Outputs:8 Nonisolated
Output Voltage nom.:120V AC
Output Current Rating:4.0A
On-state Current min.:5mA per Output
On-state Voltage Drop max.:1.0V @ 0.5A max.
Off-state Leakage Current max.:2.25mA
Isolation Voltage:120V Continuous
Flexbus Current:80mA @ 5V DC
Power Dissipation:4.1W @ 0.5A max.
Thermal Dissipation:14.0 BTU/hr. @ 0.5A max.

FAQ

Question: What is the number of outputs on the 1794-OA8?

Answer: There are 8, nonisolated outputs on the 1794-OA8.

 

Question: What are the dimensions of the 1794-OA8?

Answer: The 1794-OA8 is 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.).

 

Question: What is the price of a 1794-OA8 Allen Bradley FLEX I/O AC Digital Output Module?

Answer: Submit quote request, send us an email, or call 800-730-0292 for our best price.

 

Question: Does DO Supply offer repair services for the 1794-OA8 Allen Bradley FLEX I/O AC Digital Output Module?

Answer: Yes, DO Supply offers repair services for a variety of Allen-Bradley products, such as the 1794-OA8 For more information or to request a repair quote, please click here.  

Type Lead Time Price Action
Repair Service 2-4 weeks AskGet Quote

Our highly skilled technicians can repair your 1794-OA8. All of our repairs come with a 1 Year DO Supply Warranty. Please contact us for additional information about our repair process.

Please refer to the manual for more information about the 1794-OA8 such as the wiring diagrams, data sheets, firmware information and migration or obsolescence details.

Revision Part # Also Known as Availability
1794-OA8 Ser A
1794-OA8/A, Series A, Rev A Request Quote

Common misspellings: 1794OA8
l794-OA8
179A-OA8
1794-0A8
1794-OAb
1794-OA8X