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Allen Bradley CompactBlock I/O 1791D 1791D-4B0

1791D-4B0

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The Allen-Bradley 1791D-4B0 input module is a base input module from the Allen-Bradley/Rockwell Automation CompactBlock I/O 1791D series. It is one of the smallest base modules that is available in the CompactBlock I/O 1791D series. The 1791D-4B0 base input module comes with only 4 sinking input channels. It produces 1 input byte and consumes no output bytes during operation. The 1791D-4B0 base input module has a DeviceNet adapter device and its DeviceNet power ratings are 150 milliamps of maximum current and 11 to 25 Volts DC of voltage.

Ships Mon, Jul 21.
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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-4B0

ManufacturerRockwell Automation
BrandAllen-Bradley
Part Number/Catalog No.1791D-4B0
Inputs per Block4
Input TypeSinking
Input Off-state Voltage5V max.
Input On-state Voltage10V dc min.
Input Off-state Current1.5mA @ 5V dc min.
Input On-state Current11mA @ 30V dc max.
Outputs per Block0
Output TypeN/A
Output On-state Voltage RangeN/A
Output On-state CurrentN/A
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.

This small and efficient Input/Output module, the 1791D-4B0, is called a CompactBlock I/O module. Manufactured by Allen Bradley of Rockwell Automation, this I/O module is a part of the 1791D family of CompactBlock devices that contain 4 sinking inputs. This device has many I/O circuits, with a DeviceNet I/O adapter and a built-in power supply. Irrespective of the location, this I/O module could be used anywhere because of its small actuator or a sensor with distributed I/O blocks. It features a NEMA Type 1+ input that allows it to easily exchange data with any kind of sensor at the maximum rate of 500 Kbps for a maximum distance of 100 meters. The 1791D-4B0 also features a protection against any short circuit in the output if miswiring occurs. It has an autobaud detection feature which prevents it from crashing from incorrect baud rate by automatically matching the system baud rate. The proximity of the device to a sensor or actuator also helps bring down the cost of wiring, and, being a compact I/O module, no additional power source or adapter is needed.

The 1791D-4B0 can easily communicate with any SoftLogix controller, or an SLC or a PLC and can possibly act as a slave when in a master/slave condition. One could also select different modes of data exchange in this device like change-of-state, polled, and cyclic. In order to connect the outputs and inputs, a 24 Volt DC power supply is to be used. The 1791D-4B0 can be easily installed on a DIN rail or an enclosed panel and can be mounted either vertically or horizontally. Keep the temperature surrounding of the device in the range 0 to 60 degrees Celsius for optimum performance, and for all wire connections, use a stranded wire with a gauge of 14.

Revision Part #Also known as
1791D-4B0 Ser A1791D-4B0/A, Series A, Rev A
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