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