Allen-Bradley 1791-IOBW Block I/O module

Product Item : 1791-IOBW
Product Brand : Allen-Bradley
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Product Description
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The Allen-Bradley 1791-IOBW is a Block I/O module with Thirty-Two (32) 24VDC sink input channels and Thirty-Two (32) 24VDC source output channels. This module is a modular automation device that is built with a Remote I/O adapter, power supply, communication interface, signal conditioning circuitry as well as the I/O interfaces.

The 1791-IOBW is a legacy device. It works as a Remote I/O module for controller platforms such as PLC2, PLC3 and PLC5 automation platforms as well as SLC500 controllers with RIO scanner 1747-SN installed however, the 1791-IOBW is not compatible with 1747-DSN.

This module supports Block I/O instructions such as Block Transfer Read (BTR) and Block Transfer Write (BTR) instructions. Using this instructions, data from the Block I/O module may be sent to the controller via Block Transfer Read (BTR) instruction while commands from the processor may be sent to the module using Block Transfer Write (BTR) instruction. These instructions are sent over a physical RIO cable medium, specifically, Belden 9463 cable or equivalent. With Remote I/O protocol, this Block I/O module may be connected to the controller following Daisy-chain topology. It supports transmission speeds of 57.6K for 10,000 cable-feet; 115.2K for 5,000 cable-feet and 230.4K 2,500 cable-feet.