1791-8BR - In Stock | Allen Bradley PLC 1791 Block I/O

1791-8BR

Rated 4.6 with 17 reviews

DO Supply is NOT an authorized distributor for this manufacturer and therefore the manufacturer’s warranty does not apply. Product comes with DO Supply's 1-year warranty

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.

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.


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1791-8BR

Revisions: Ser A Ser B 
Description: The Allen-Bradley 1791-8BR is a Block I/O module. This is a input / output module featuring Eight (8) input and Eight (8) relay output channels. The input channels of this block I/O module are 24VDC rated while the relay output channels are dry contact outputs that are compatible with AC or DC voltages. This module supports Remote I/O (RIO) protocol and connects RIO scanners and controllers.
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Description: The Allen-Bradley 1791-8BR is a Block I/O module. This is a input / output module featuring Eight (8) input and Eight (8) relay output channels. The input channels of this block I/O module are 24VDC rated while the relay output channels are dry contact outputs that are compatible with AC or DC voltages. This module supports Remote I/O (RIO) protocol and connects RIO scanners and controllers.

DO Supply is NOT an authorized distributor for this manufacturer and therefore the manufacturer’s warranty does not apply. Product comes with DO Supply's 1-year warranty

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.

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better business bureau
Revisions: Ser A Ser B 

Warranty: 1 year DO Supply Warranty Included
Shipping: Worldwide shipping via UPS, DHL, and TNT
Repairs: We offer repair service for the 1791-8BR.
Exchange: Exchange credit for your defective unit available.
Conditions: We sell preowned surplus and refurbished parts.

To speak to a sales representative for pricing & lead time:


Rated 4.6 with 17 reviews

    Technical Specifications for 1791-8BR

ManufacturerRockwell Automation
Dimensions6.95 x 2.7 x 3.85 in.
Mounting orientationVertical and Horizontal
Output voltage:20-30V dc @ 1A resistive, max.
Input On-state voltage:10-30VDC
No. of InputsEight (8)
Module power:24VDC
Module TypeBlock I/O combination module
Compatible ControllersPLC-2, PLC-3, PLC-5/20, and PLC-5
BrandAllen-Bradley
Input Off-state Voltage5V dc max.
Input Off-state Current1.5mA min.
Part Number/Catalog No.1791-8BR
Input On-state Current11mA @ 30V max.
Voltage24V dc
Inputs per Block8
Input On-state Voltage Range10-30V dc
Outputs per Block8
Output Voltage Range20-30V dc @ 1A resistive max.
External Power19.2-30V dc
Product Lifecycle Status*Discontinued/Obsolete

*The Allen Bradley 1791-8BR has been discontinued by the manufacturer, however we specialize in obsolete parts and can likely still supply surplus and/or refurbished replacement 1791-8BR units instead of migration.

ManufacturerRockwell Automation
Dimensions6.95 x 2.7 x 3.85 in.
Mounting orientationVertical and Horizontal
Output voltage:20-30V dc @ 1A resistive, max.
Input On-state voltage:10-30VDC
No. of InputsEight (8)
Module power:24VDC
Module TypeBlock I/O combination module
Compatible ControllersPLC-2, PLC-3, PLC-5/20, and PLC-5
BrandAllen-Bradley
Input Off-state Voltage5V dc max.
Input Off-state Current1.5mA min.
Part Number/Catalog No.1791-8BR
Input On-state Current11mA @ 30V max.
Voltage24V dc
Inputs per Block8
Input On-state Voltage Range10-30V dc
Outputs per Block8
Output Voltage Range20-30V dc @ 1A resistive max.
External Power19.2-30V dc
Product Lifecycle Status*Discontinued/Obsolete

*The Allen Bradley 1791-8BR has been discontinued by the manufacturer, however we specialize in obsolete parts and can likely still supply surplus and/or refurbished replacement 1791-8BR units instead of migration.

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About 1791-8BR

The Allen-Bradley 1791-8BR is a Compact block I/O module. This module is a combination module that features Eight (8) 24VDC inputs and Eight (8) Normally Open (N.O.) contact outputs. This module has a rackless design, installed directly to a standard DIN rail or directly panel mounted. It comes with a built-in power supply, communication interface, I/O interfaces and corresponding signal conditioning circuitry.

The 1791-8BR supports Remote I/O (RIO) protocol for interfacing with controllers and RIO scanners. With its compact design and built-in components, the 1791-8BR is capable of functioning as a stand-alone distributed I/O station. It may be installed near the input and output devices in the field to eliminate long cable runs.

The 1791-8BR, similar to any other Block I/O module, are compatible with PLC and SLC automation product families. Specifically, the 1791-8BR are compatible for use with PLC- Family scanner modules such as 1771-SN and 1772-SD / 1772-SD2; Any PLC-3 scanner modules and 1775-S5, or 1775-SR5 module from the PLC3 family and PLC-5VME (6008-LTV) module.

Incoming power connections are made via terminals +24 (1), RET +24 (3) and GND (2). Remote I/O (RIO) connections are made via terminals BLU (6), CLR (8) and SHD (7).

Compatible input devices for the input channels of the 1791-8BR are proximity switches, limit switches, selector switches, float switches, pushbutton switches, auxiliary contacts and other binary signaling devices. Compatible output devices are solenoid actuated devices, motor starters, inductive and resistive loads. The 1791-8BR does not come with internal fusing. Appropriate external protection may be installed as needed.

This module receives DC power as an input and delivers AC power as an output. There are 8 inputs per block on this module. Additionally, this module's outputs are in one group with a normally open relay. The 1791-8BR has three different outputs voltages: 20 to 132 Volts AC, 20 to 30 Volts DC, and 125 Volts DC. These differences are caused by the characteristic of the output that depends on the load. Hence, other ratings are varied as well. Examples of other parameters a output current rating, power rating, and surge current. Among these parameters, the most critical parameter is surge current. You need to pay attention to the surge current of this output and the devices it is connected to because this module does not have a surge limiting current. You need to use external fuses to prevent any damage. This action is necessary because even if this module has internal protection, this internal protection is able to protect the circuit inside the module only. The external circuit is not protected by this internal protection. When terminating signal wires to the Block I/O module, use 14-gauge stranded wire with 3/64 maximum insulation thickness. Increase load current by using a high-quality conductor with low resistance. Parallel output connections is not permitted as this lowers the overall circuit resistance.

FAQ for 1791-8BR

What is the price of 1791-8BR?


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

Does DO Supply Inc. offer repairs for part 1791-8BR?


Yes. Our highly skilled technicians can repair your 1791-8BR. All our repairs come with a 1 Year Warranty. Please contact us for additional information about our repair process

How many input and output channels does the 1791-8BR have?


The 1791-8BR has Eight (8) 24VDC input channels and Eight (8) relay output channels.

What is the contact form of the relay output channels?


The 1791-8BR output contacts are Normally Open (N.O.) Relay contacts.

Does the 1791-8BR support Remote I/O protocol?


Yes. Remote I/O protocol is the standard communication protocol supported by Block I/O modules.

Technical Description of 1791-8BR

24V dc BLOCK I/O Allen-Bradley AB with 8 Inputs per Block and 8 Outputs per Block.

Repair Services for 1791-8BR

Type Lead Time Price Action
Repair Service 2-4 weeks $753cartAdd to Cart

Our highly skilled technicians can repair your 1791-8BR. All of our repairs come with a 1 Year DO Supply Warranty. Please contact us for additional information about our repair process.

Revisions for 1791-8BR

Please refer to the manual for more information about the 1791-8BR such as the wiring diagrams, data sheets and migration or obsolescence details.

Revision Part # Also Known as Availability
1791-8BR Ser A
1791-8BR/A, Series A, Rev A Request Quote
1791-8BR Ser B
1791-8BR/B, Series B, Rev B Request Quote
Common misspellings:
  • l791-8BR
  • 179l-8BR
  • 1791-bBR
  • 1791-88R
  • 17918BR

Reviews for 1791-8BR

Internal Review

"The 1791-8BR is a block I/O combination module. It features Eight (8) 24VDC input and Eight (8) relay output channels. This module is ideally used in applications with limited expansion and output devices operating at different voltage categories such as AC and DC voltages. This provides a practical alternative, allowing users to maximize panel space while having flexible functionality of the control system. " -DO Supply Tech

Dimensions For 1791-8BR

Size
Input Type
Panel Cutout Height in mm
Panel Cutout Width in mm
Terminal Height in mm
Terminal Width in mm
Terminal Overall Depth in mm
Terminal Mounted Depth in mm

Dimensions For 1791-8BR

Resolutions For 1791-8BR

About

Technical Specifications for 1791-8BR

ManufacturerRockwell Automation
Dimensions6.95 x 2.7 x 3.85 in.
Mounting orientationVertical and Horizontal
Output voltage:20-30V dc @ 1A resistive, max.
Input On-state voltage:10-30VDC
No. of InputsEight (8)
Module power:24VDC
Module TypeBlock I/O combination module
Compatible ControllersPLC-2, PLC-3, PLC-5/20, and PLC-5
BrandAllen-Bradley
Input Off-state Voltage5V dc max.
Input Off-state Current1.5mA min.
Part Number/Catalog No.1791-8BR
Input On-state Current11mA @ 30V max.
Voltage24V dc
Inputs per Block8
Input On-state Voltage Range10-30V dc
Outputs per Block8
Output Voltage Range20-30V dc @ 1A resistive max.
External Power19.2-30V dc
Product Lifecycle Status*Discontinued/Obsolete
ManufacturerRockwell Automation
Dimensions6.95 x 2.7 x 3.85 in.
Mounting orientationVertical and Horizontal
Output voltage:20-30V dc @ 1A resistive, max.
Input On-state voltage:10-30VDC
No. of InputsEight (8)
Module power:24VDC
Module TypeBlock I/O combination module
Compatible ControllersPLC-2, PLC-3, PLC-5/20, and PLC-5
BrandAllen-Bradley
Input Off-state Voltage5V dc max.
Input Off-state Current1.5mA min.
Part Number/Catalog No.1791-8BR
Input On-state Current11mA @ 30V max.
Voltage24V dc
Inputs per Block8
Input On-state Voltage Range10-30V dc
Outputs per Block8
Output Voltage Range20-30V dc @ 1A resistive max.
External Power19.2-30V dc
Product Lifecycle Status*Discontinued/Obsolete

*The Allen Bradley 1791-8BR has been discontinued by the manufacturer, however we specialize in obsolete parts and can likely still supply surplus and/or refurbished replacement 1791-8BR units instead of migration.

About 1791-8BR

The Allen-Bradley 1791-8BR is a Compact block I/O module. This module is a combination module that features Eight (8) 24VDC inputs and Eight (8) Normally Open (N.O.) contact outputs. This module has a rackless design, installed directly to a standard DIN rail or directly panel mounted. It comes with a built-in power supply, communication interface, I/O interfaces and corresponding signal conditioning circuitry.

The 1791-8BR supports Remote I/O (RIO) protocol for interfacing with controllers and RIO scanners. With its compact design and built-in components, the 1791-8BR is capable of functioning as a stand-alone distributed I/O station. It may be installed near the input and output devices in the field to eliminate long cable runs.

The 1791-8BR, similar to any other Block I/O module, are compatible with PLC and SLC automation product families. Specifically, the 1791-8BR are compatible for use with PLC- Family scanner modules such as 1771-SN and 1772-SD / 1772-SD2; Any PLC-3 scanner modules and 1775-S5, or 1775-SR5 module from the PLC3 family and PLC-5VME (6008-LTV) module.

Incoming power connections are made via terminals +24 (1), RET +24 (3) and GND (2). Remote I/O (RIO) connections are made via terminals BLU (6), CLR (8) and SHD (7).

Compatible input devices for the input channels of the 1791-8BR are proximity switches, limit switches, selector switches, float switches, pushbutton switches, auxiliary contacts and other binary signaling devices. Compatible output devices are solenoid actuated devices, motor starters, inductive and resistive loads. The 1791-8BR does not come with internal fusing. Appropriate external protection may be installed as needed.

This module receives DC power as an input and delivers AC power as an output. There are 8 inputs per block on this module. Additionally, this module's outputs are in one group with a normally open relay. The 1791-8BR has three different outputs voltages: 20 to 132 Volts AC, 20 to 30 Volts DC, and 125 Volts DC. These differences are caused by the characteristic of the output that depends on the load. Hence, other ratings are varied as well. Examples of other parameters a output current rating, power rating, and surge current. Among these parameters, the most critical parameter is surge current. You need to pay attention to the surge current of this output and the devices it is connected to because this module does not have a surge limiting current. You need to use external fuses to prevent any damage. This action is necessary because even if this module has internal protection, this internal protection is able to protect the circuit inside the module only. The external circuit is not protected by this internal protection. When terminating signal wires to the Block I/O module, use 14-gauge stranded wire with 3/64 maximum insulation thickness. Increase load current by using a high-quality conductor with low resistance. Parallel output connections is not permitted as this lowers the overall circuit resistance.

FAQ for 1791-8BR

What is the price of 1791-8BR?


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

Does DO Supply Inc. offer repairs for part 1791-8BR?


Yes. Our highly skilled technicians can repair your 1791-8BR. All our repairs come with a 1 Year Warranty. Please contact us for additional information about our repair process

How many input and output channels does the 1791-8BR have?


The 1791-8BR has Eight (8) 24VDC input channels and Eight (8) relay output channels.

What is the contact form of the relay output channels?


The 1791-8BR output contacts are Normally Open (N.O.) Relay contacts.

Does the 1791-8BR support Remote I/O protocol?


Yes. Remote I/O protocol is the standard communication protocol supported by Block I/O modules.

Technical Description of 1791-8BR

24V dc BLOCK I/O Allen-Bradley AB with 8 Inputs per Block and 8 Outputs per Block.
Repairs
Type Lead Time Price Action
Repair Service 2-4 weeks $753cartAdd to Cart

Our highly skilled technicians can repair your 1791-8BR. All of our repairs come with a 1 Year DO Supply Warranty. Please contact us for additional information about our repair process.

Type Lead Time Price Action
Repair Service 2-4 weeks $753cartAdd to Cart

Our highly skilled technicians can repair your 1791-8BR. All of our repairs come with a 1 Year DO Supply Warranty. Please contact us for additional information about our repair process.

Revisions

Please refer to the manual for more information about the 1791-8BR such as the wiring diagrams, data sheets and migration or obsolescence details.

Revision Part # Also Known as Availability
1791-8BR Ser A
1791-8BR/A, Series A, Rev A Request Quote
1791-8BR Ser B
1791-8BR/B, Series B, Rev B Request Quote

Common misspellings:
  • l791-8BR
  • 179l-8BR
  • 1791-bBR
  • 1791-88R
  • 17918BR
PDF
Reviews

Reviews for 1791-8BR

Internal Review

"The 1791-8BR is a block I/O combination module. It features Eight (8) 24VDC input and Eight (8) relay output channels. This module is ideally used in applications with limited expansion and output devices operating at different voltage categories such as AC and DC voltages. This provides a practical alternative, allowing users to maximize panel space while having flexible functionality of the control system. " -DO Supply Tech