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Revisions: Ser A

Description:   The Allen-Bradley 1794-OB16P Flex I/O Digital DC Output Module has 16 Sourcing Current Outputs, a 24V DC On-state Voltage nom., and a 8.0A Output Current Rating. It also operates with a 0.5V DC On-state Voltage Drop max. and a 0.5mA Off-state Leakage Current max..

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About 1794-OB16P

The Allen-Bradley 1794-OB16P is a FLEX 24 Volts DC Series A digital I/O module. It has 16 source outputs that are non-isolated and protected and has been conformally coated, with 0.5 Amps for each output. It can handle overloads, high temperatures, and shorts because it features self-protection. Once the problem is solved, the faulted output will return automatically; however, feedback to the processor will not. This module can communicate on ControlNet, DeviceNet, PROFIBUS, and EtherNet/IP networks and comes with an RS-232 communication port. The 1794-OB16P module uses screw clamp terminations and it can only be mounted on a DIN rail and only use the following terminal base units: the 1794-TB3, 1794-TB3K, 1794-TB2, 1794-TBN, 1794-TBNK, 1794-TB3S, and the 1794-TB3SK.

It has an external DC supply voltage range of 10 to 31.2 Volts DC, with the 5% AC ripple included, and an external DC supply current range of 25 to 75 mA. The 1794-OB16P’s on-state voltage range is also 10 to 31.2 Volts DC. Its on-state output voltage drop is 0.5 Volts DC. The minimum current on-state output is 1 mA per channel and the maximum is 500 mA per channel or 8 Amps per module. This module also has a leakage current of 0.5 mA for off-state output and a maximum output surge current of 1.5 Amps for 50 milliseconds that is repeatable every 2 seconds. Note that this module does not have any isolation between the individual channels.

The 1794-OB16P’s output delay is 0.5 milliseconds in the OFF to ON state and 1 milliseconds in the ON to OFF state. The maximum power dissipation is 5 W at 31.2 Volts DC, the thermal dissipation is 17 BTU/hour at 31.2 Volts DC, and the maximum Flexbus current is 60 mA. The 1794-OB16P module has an operating temperature of 0 to 55 degrees Celsius and a storage temperature of -40 to 85 degrees Celsius and comes with a non-condensing relative humidity of 5 to 95%. It also has an operating vibration of 30g and a non-operating vibration of 50g. Its vibration is 5 g at 10 to 500 Hertz.

Technical specifications:

Part Number:1794-OB16P
Product Type:Flex I/O Digital DC Output Module
Outputs:16 Sourcing Current
On-state Voltage nom.:24V DC
Output Current Rating:8.0A
On-state Current max.:500mA per Channel
On-state Voltage Drop max.:0.5V DC
Off-state Leakage Current max.:0.5mA
Isolation Voltage:50V Continuous
Flexbus Current:60mA at 5V DC
Power Dissipation:5.0W at 31.2V DC max.
Thermal Dissipation:17.0 BTU/hr. at 31.2V DC max.


Question: What is the recommended terminal base unit for 1794-OB16P FLEX I/O Output Modules?

Answer: The recommended terminal base units for 1794-OB16P FLEX I/O Output Modules are the following: 1794-TB2, 1794-TB3, 1794-TB3S,1794-TB3K, and 1794-TB3SK.


Question: Is a 1794-OB16P FLEX I/O Output Module fused?

Answer: No, 1794-OB16P is not factory fused. Fusing is recommended. If operators fuse 1794-OB16P, external fusing must be provided using SAN-O MQ4 800mA fuses.


Question: What is the price of 1794-OB16P FLEX I/O Output Modules?

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


Question: Where can I find repair services for the 1794-OB16P FLEX I/O Output Module?

Answer: DO Supply offers repair services for a variety of Allen-Bradley products, such as the 1794-OB16P. For more information or to request a repair quote, please click here

Please refer to the manual for more information about the 1794-OB16P such as the wiring diagrams, data sheets, firmware information and migration or obsolescence details.

Revision Part # Also Known as Availability
1794-OB16P Ser A
1794-OB16P/A, Series A, Rev A Request Quote

Common misspellings: 1794OB16P
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