Which terminal bases accept 1794-OB8EP?

Rockwell Automation lists 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN and the corresponding K variants in the installation instructions.

What is the output polarity of 1794-OB8EP?

It is a sourcing DC output module for loads wired to the module's output and common arrangement.

How much current can one 1794-OB8EP channel switch?

A channel is rated up to 2 A, while all output loading must also remain within the 10 A module limit.

How are electronic fuses reset on 1794-OB8EP?

Correct the field fault first, then use the module reset button, the documented output-image reset bit or a controlled backplane-power cycle.

Which key position is used for 1794-OB8EP?

Set the terminal-base keyswitch to position 2 before inserting the module.

Does 1794-OB8EP provide channel-to-channel isolation?

No. The published isolation is between the field side and system side, not between individual outputs.

How should surge loads be reviewed for 1794-OB8EP?

Compare the load inrush profile with the published 4 A for 50 ms every three seconds surge capability and the module current limit.

What completes commissioning of 1794-OB8EP?

Prove each addressed output, confirm field voltage and load response, clear protection indications and verify the final safe state.

1794-OB8EP

Name: 1794-OB8EP
Brand: Allen-Bradley
SKU: 1794-OB8EP

FLEX I/O 8-Channel Sourcing Output Module

Product image is representative; revision or series may vary. Contact us to request a specific version.

Product Describe：

Allen-Bradley 1794-OB8EP is an eight-channel FLEX I/O electronically protected DC sourcing output module. It switches 24 V DC field loads and reports channel protection status through the FLEX I/O system.

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Technical specifications for 1794-OB8EP

Manufacturer:

Allen-Bradley
Product Category:

PLC Systems
Spare Part Number:

1794-OB8EP
Estimated shipping dimensions:

9.3x4.9x5.5cm
Weight:

0.12 kg
Tariff Code:

8537101190
Counliy of origin:

USA
Output channels:

8 sourcing
On-state voltage range:

19.2-31.2 V DC
Nominal output voltage:

24 V DC
Maximum current per output:

2 A
Maximum current per module:

10 A
Minimum on-state current:

1 mA per channel
Maximum on-state voltage drop:

0.2 V
Surge current:

4 A for 50 ms every 3 s
Maximum off-state leakage:

0.5 mA
Output delay:

0.1 ms on; 0.1 ms off
Isolation:

50 V continuous
Isolation type test:

850 V DC for 1 s
Interchannel isolation:

None
FlexBus current:

73 mA at 5 V DC
Maximum power dissipation:

5.5 W at 31.2 V DC
Maximum thermal dissipation:

18.8 BTU/h
Terminal-base key position:

2
Output protection:

Electronic fusing

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Information

Overview Manuals Common Applications Product Precautions

Sources field current from eight independently addressed output points
Limits fault energy through electronic output protection
Transfers output commands over the FLEX I/O backplane
Supports fuse reset through the module button or output image

1794-OB8EP operates with 1794 terminal base, FLEX I/O adapter, 24 V DC field supply, sourcing-compatible field loads.
Typical engineered duties include 24 V DC solenoid control, Interposing relay drive, Machine actuator outputs, Protected distributed-output stations.

Important Notice: Before energizing 1794-OB8EP, confirm terminal-base compatibility, keying, output/common assignments, per-channel load and the 10 A module-current limit.

Apter Power 1794-OB8EP Manuals and Guides

Important Notice: The first document is an Apter Power 1794-OB8EP model-specific technical reference. The second is a distinct document for installation, configuration or system engineering.

1794-OB8EP 24 V DC solenoid control

Sources field current from eight independently addressed output points

1794-OB8EP Interposing relay drive

Limits fault energy through electronic output protection

1794-OB8EP Machine actuator outputs

Transfers output commands over the FLEX I/O backplane

1794-OB8EP Protected distributed-output stations

Supports fuse reset through the module button or output image

Read the applicable Allen-Bradley installation instructions before work. Verify 1794-OB8EP and the installed-system configuration.

Select an approved 1794 terminal base and set key position 2.

Keep total module current within the permitted channel-loading combinations.

De-energize field power before landing or moving conductors.

Reset an electronic fuse only after the field fault has been found and corrected.

Commission 1794-OB8EP under controlled conditions and retain the completed functional-test record before release.

Technical notes

1794-OB8EP uses even-numbered terminal positions for outputs on the supported base arrangements. Commission each load with the field supply controlled and verify that no electronic-fuse indication remains active.

FAQ View All FAQ

Which terminal bases accept 1794-OB8EP?

Rockwell Automation lists 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN and the corresponding K variants in the installation instructions.
What is the output polarity of 1794-OB8EP?

It is a sourcing DC output module for loads wired to the module's output and common arrangement.
How much current can one 1794-OB8EP channel switch?

A channel is rated up to 2 A, while all output loading must also remain within the 10 A module limit.
How are electronic fuses reset on 1794-OB8EP?

Correct the field fault first, then use the module reset button, the documented output-image reset bit or a controlled backplane-power cycle.

Which key position is used for 1794-OB8EP?

Set the terminal-base keyswitch to position 2 before inserting the module.
Does 1794-OB8EP provide channel-to-channel isolation?

No. The published isolation is between the field side and system side, not between individual outputs.
How should surge loads be reviewed for 1794-OB8EP?

Compare the load inrush profile with the published 4 A for 50 ms every three seconds surge capability and the module current limit.
What completes commissioning of 1794-OB8EP?

Prove each addressed output, confirm field voltage and load response, clear protection indications and verify the final safe state.

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