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Revisions: Ser A

Description:   The Allen-Bradley 1794-OB8 Flex I/O Digital DC Output Module has 8 Sourcing Current Outputs, a 24V DC On-state Voltage nom., and a 4A 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-OB8

The Allen-Bradley 1794-OB8 is a 1794 FLEX Digital DC Output Module. It is fitted inside the terminal bus, making a connection with the field devices and the I/O bus. Modules can be inserted or removed under power since the I/O module does not have any direct wiring. It in turn saves time and removes system restarting inefficiency.
The 1794-OB8 module has 8 current sourcing outputs. It has 24V DC nominal On-State output voltage. It has a maximum output delay time of 0.5ms from Off-to-On and 1ms from On-to-Off. It has a maximum power dissipation of 3.3W at 31.2V DC. Terminal Base units compatible with it are the 1794-TB3, 1794-TB3S, and the 1794-TBKD. The 1794-OB8 has an external power supply of 10 - 31.2V DC voltage with a 5% AC ripple and 10 - 35mA current. It is installed using a DIN rail by simply snapping it onto the DIN rail. It has various communication options such as ControlNet, DeviceNet, EtherNet/IP, and Universal Remote I/O.
The 1794-OB8 module has 16 yellow LED status indicators for each channel indicating a corresponding input device and output signal. It also has XT versions of standard modules for operating in extreme environments which reduce panel and maintenance costs. The 1794-OB8 has a 0 - 55 °C (32 - 131 °F) operating temperature and 5 - 95% noncondensing relative humidity.

Technical specifications:

Manufacturer:Rockwell Automation
Part Number/Catalog No.:1794-OB8
Product Type:Flex I/O Digital DC Output Module
Outputs:8 Sourcing Current
On-state Voltage nom.:24V DC
Output Current Rating:4A
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 @ 5V DC
Power Dissipation:3.3W @ 31.2V DC max.
Thermal Dissipation:11.2 BTU/hr. @ 31.2V DC max.
Type Lead Time Price Action
Repair Service 2-4 weeks AskGet Quote

Our highly skilled technicians can repair your 1794-OB8. 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-OB8 such as the wiring diagrams, data sheets, firmware information and migration or obsolescence details.

Revision Part # Also Known as Availability
1794-OB8 Ser A
1794-OB8/A, Series A, Rev A Request Quote

Common misspellings: 1794OB8