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Allen Bradley CompactBlock I/O 1791D 1791D-0B8P

1791D-0B8P

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The 1791D-0B8P output module is a base output module from the Allen-Bradley/Rockwell Automation CompactBlock I/O 1791D series. It comes with 8 outputs. The 1791D-0B8P base output module can connect to an expansion input module or an expansion output module which will increase the number of I/O devices it can connect to and change the amount of bytes that it produces and consumes. It can connect to either a 16-channel expansion output module for a total of 24 outputs or to a 16-channel expansion input module for a total of 8 outputs and 16 inputs. The 1791D-0B8P base output module?s byte production and consumption ratings are 0 produced input bytes and 1 consumed output byte on its own, 1 produced input byte and 3 consumed output bytes with an expansion output module, and 3 produced input bytes and 1 consumed output byte with an expansion input module.

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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 our products come with DO Supply's 2-year warranty.
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Technical specifications for 1791D-0B8P

ManufacturerRockwell Automation
BrandAllen-Bradley
Part Number/Catalog No.1791D-0B8P
Inputs per Block0
Input TypeN/A
Input Off-state VoltageN/A
Input On-state VoltageN/A
Input Off-state CurrentN/A
Input On-state CurrentN/A
Outputs per Block8
Output TypeSourcing
Output On-state Voltage Range10-30V dc
Output On-state Current0.5 A max.
DeviceNet Power11-25V dc
EnclosureIEC IP20
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.

The Allen-Bradley 1791D-0B8P is a DC compact block base module I/O. The 1791D-0B8P is one of 1791D series. This module has 8 outputs and no inputs. However, you can expand the number of inputs and outputs by using an expansion module. There are two expansion schemes you can use. First, the 1791D-0B8P can be expanded into 24 outputs and 0 inputs. On this scheme, the module will consume 3 output bytes and produce 1 input byte. This extra byte is returned to or shows the health of the expansion module. Second, 1791D-0B8P can be expanded into 8 output and 16 inputs. This scheme will make the module consume 3 output bytes and 1 input byte. This expansion also can make the DeviceNet current jump to 200 mA while the voltage will be around 11 to 25 Volts DC.

The 1791D-0B8P contain several features: power supply, DeviceNet I/O adapter, and I/O circuit. The device power of this module is 10 to 30 Volts DC. Thus, it can accommodate a broad range of power supplies and many voltage levels. There is also output short-circuit protection. This feature would prevent any damage due to wiring mistakes. The  I/O block is located near the sensors and actuators. This can help you to reduce wiring cost and time needed to install the module. The 1791D-0B8P also has several product certifications such as CE marked for all applicable directives, UL, UL hazardous class I, C-UL, and C-UL hazardous class I. The enclosure of this module follows IEC IP20 standard.

Revision Part #Also known as
1791D-0B8P Ser A1791D-0B8P/A, Series A, Rev A
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1791D-0B8P Ser B1791D-0B8P/B, Series B, Rev B
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1791D-0B8P Ser C1791D-0B8P/C, Series C, Rev C
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