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Allen Bradley CompactBlock I/O 1791R 1791R-8B8P

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

1791R-8B8P

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The 1791R-8B8P I/O module is a CompactBlock Remote I/O module from the Allen-Bradley/Rockwell Automation CompactBlock I/O 1791R series. It has 8 sinking inputs and 8 sourcing outputs. The 1791R-8B8P I/O module is a base I/O module that can operate on its own or with an expansion module. Expansion modules can provide the base I/O module with more input or output channels. The 1791R-8B8P I/O module has an on-state voltage range of 10 to 30 Volts DC.

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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 1791R-8B8P

ManufacturerAllen Bradley
CategoryPLCs
Product LineCompactBlock I/O 1791R
Part Number1791R-8B8P
Weight0.50 lbs (0.23 kg)
Inputs per blockgroups of 4 or 8
Outputs per blockgroups of 4 or 8
Input TypeSinking
Output TypeSourcing
Input Off-state Voltage5V dc max.
Input On-state Voltage10V dc min.
Input Off-state Current1.5mA min.
Input On-state Current2mA @ 10V dc min.
Output On-state Voltage Range10-30V dc
Output On-state Current0.5mA max.
EnclosureIP19
Product Lifecycle Status*Discontinued/Obsolete

* The Allen Bradley 1791R-8B8P has been discontinued by the manufacturer, however we specialize in obsolete parts and can likely still supply surplus and/or refurbished replacement 1791R-8B8P units instead of migration.

The Allen Bradley 1791R-8B8P is an 8-point DC CompactBlock I/O. The module comes with 4 or 8 outputs and inputs per block. This I/O block only has a base module. It can be mounted on a panel or a DIN rail. You can mount this device either horizontally or vertically. Base and expansion modules can be mounted side by side. Use a remote I/O female 3-pin connector when creating a connection to the terminal. When installing this module, read the manual first**.** This helps to prevent incorrect polarity connections because DC connections are sensitive to polarity**.**

The 1791R-8B8P has many international certifications, including the UL Listed Industrial Control Equipment, European Union 89/336/EEC EMC Directive, and the AS/NZS 2064. These certifications ensure that every aspect of this module has been tested and complies with international standards. This module also has isolation that can withstand a voltage of up to 500 volts DC. It can isolate the connection between auxiliary I/O power-to-RIO, I/O group-to-group, and I/O group-to-RIO. This module can convert 24 volts of DC power into the appropriate amount for the processor. The input system of this module contains system circuitry, which increases the safety of this module. It is possible to check its condition by looking at the status, communication, and I/O indicators.

Revision Part #Also known as
1791R-8B8P Ser A1791R-8B8P/A, Series A, Rev A
1791R-8B8P Ser B1791R-8B8P/B, Series B, Rev B
1791R-8B8P Ser C1791R-8B8P/C, Series C, Rev C
1791R-8B8P Ser D1791R-8B8P/D, Series D, Rev D
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