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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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| Manufacturer | Allen Bradley |
|---|---|
| Category | PLCs |
| Product Line | CompactBlock I/O 1791R |
| Part Number | 1791R-8B8P |
| Weight | 0.50 lbs (0.23 kg) |
| Inputs per block | groups of 4 or 8 |
| Outputs per block | groups of 4 or 8 |
| Input Type | Sinking |
| Output Type | Sourcing |
| Input Off-state Voltage | 5V dc max. |
| Input On-state Voltage | 10V dc min. |
| Input Off-state Current | 1.5mA min. |
| Input On-state Current | 2mA @ 10V dc min. |
| Output On-state Voltage Range | 10-30V dc |
| Output On-state Current | 0.5mA max. |
| Enclosure | IP19 |
| 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 A | 1791R-8B8P/A, Series A, Rev A | |
| 1791R-8B8P Ser B | 1791R-8B8P/B, Series B, Rev B | |
| 1791R-8B8P Ser C | 1791R-8B8P/C, Series C, Rev C | |
| 1791R-8B8P Ser D | 1791R-8B8P/D, Series D, Rev D | |
| Don't see your particular revision? Contact us now. | ||
COMPACTBLOCK 16 POINT COMBINATION BLOCK Allen Bradley Module AB with a 5V dc max. input Off-state Voltage and a 10V dc min. input On-state Voltage ,also an output On-state Voltage Range of 10-30V dc.