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1794-OB8EP

FLEX I/O 8-Channel Sourcing Output Module
In Stock
Ships by Tuesday, September 22
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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

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

Information

Information

Overview Manuals Common Applications Product Precautions
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.
  • 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.
1
Select an approved 1794 terminal base and set key position 2.
2
Keep total module current within the permitted channel-loading combinations.
3
De-energize field power before landing or moving conductors.
4
Reset an electronic fuse only after the field fault has been found and corrected.
5
Commission 1794-OB8EP under controlled conditions and retain the completed functional-test record before release.

Technical notes

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.

FAQS

  • 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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Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

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