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Allen Bradley 1791 Block I/O 1791-24AR

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

1791-24AR

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The 1791-24AR block I/O module is an industrial input and output module that is available from the Allen-Bradley/Rockwell Automation 1791 Block I/O series. It features 24 inputs and 8 relay outputs. The 1791-24AR block I/O module has an input voltage range of 79 to 132 Volts AC and an output voltage range of 20 to 132 Volts AC at 1 Amp of maximum resistive current. Additionally, the external power source voltage rating for this block I/O module is from 85 to 132 Volts AC. The 1791-24AR block I/O module has dimensions of 3.85 x 4.35 x 6.95 inches.

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Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All of our products come with DO Supply's 2-year warranty.
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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a 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. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply 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.

Technical specifications for 1791-24AR

ManufacturerAllen Bradley
CategoryPLCs
Product Line1791 Block I/O
Part Number1791-24AR
UPC612598124763
Weight2.50 lbs (1.13 kg)
Voltage120V ac
Inputs per Block24
Input On-state Voltage Range79-132V ac
Input On-state Current12.3mA @ 132V max.
Input Off-state Voltage35V max.
Input Off-state Current2.3mA min.
Outputs per Block8
Output Voltage Range20-132V ac @ 1A resistive max.
External Power85-132V ac
Product Lifecycle Status*Discontinued/Obsolete

* The Allen Bradley 1791-24AR has been discontinued by the manufacturer, however we specialize in obsolete parts and can likely still supply surplus and/or refurbished replacement 1791-24AR units instead of migration.

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The Allen Bradley 1791-24AR is a unique AC block I/O Module. This module has 8 relay outputs and 24 inputs. There are 24 inputs per block on the 1791-24AR, which are formed by 3 group of 8. The 8 outputs on this module are electromechanical relays. These relays are normally open.  The nominal input voltage is 120 Volts AC with an input current of 11 milliamps, these are the same input ratings as the other common AC Block modules of the 1791 series.

The output voltage range of 1791-24AR is dependent on the load. This means the output voltage can be either a DC or an AC voltage type. For example, at 1 Amps resistive maximum, the output voltage will be 20 - 132 Volts AC or 20 - 30 Volts DC. The lower the resistive maximum, the higher the output voltage will be. At 0.2 Amps resistive maximum, the output voltage can increase up to 125 Volts DC. The output current rating of 1791-24AR is dependent on the rated power or power factor. The output current rating of the resistive group has same specifications as described on output voltage range. However, the inductive group has different specifications than the resistive group. At 20 - 132 Volts AC and cos phi = 0.4, the output current will be 0.5 Amps. At 20 - 30 Volts DC and L/R = 7 ms, the output current will be 1 Amps. Lastly, at a steady 125 Volts DC, the output current will be 0.1 Amps.

Revision Part #Also known as
1791-24AR Ser A1791-24AR/A, Series A, Rev A
1791-24AR Ser B1791-24AR/B, Series B, Rev B
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