10-In/6-Out DC Block I/O Module | 1791-IOBB | Allen-Bradley

Allen-Bradley 1791-IOBB Series B 16-Point Remote Block I/O Module

Product Overview

The 1791-IOBB (Series B) is a specialized discrete DC Block I/O module manufactured by Rockwell Automation. This module is engineered for distributed control via the Universal Remote I/O (RIO) network, providing a compact and ruggedized interface for legacy Logix systems, including PLC-2, PLC-3, and PLC-5. The 1791-IOBB features a unique asymmetric mixed I/O configuration, providing 10 sinking inputs and 6 sourcing outputs in a single self-contained unit. This design eliminates the need for separate chassis or power supplies at the machine site, significantly reducing wiring complexity and installation costs in factory automation and material handling environments.

Technical Specifications

The 1791-IOBB provides high-density digital interfacing with the following technical parameters. Note that while some documentation lists an 8/8 split, the official 1791-IOBB hardware is verified as a 10-input/6-output configuration.

• Manufacturer: Rockwell Automation / Allen-Bradley

• Model Number: 1791-IOBB

• Series: Series B (Compatible with Series A applications)

• I/O Point Count: 16 Points Total

• Input Configuration: 10 Sinking Inputs (NPN compatible)

• Output Configuration: 6 Sourcing Outputs (PNP compatible)

• Input Voltage Range: 10–30V DC (24V DC Nominal)

• Output Voltage Range: 10–30V DC (24V DC Nominal)

• Output Current Rating: 200 mA per channel

• Network Interface: Universal Remote I/O (RIO)

• Communication Rates: 57.6k, 115.2k, and 230.4k baud

• Isolation Voltage: 1500V AC (Logic to I/O)

• Power Supply: 24V DC (Logic is powered via the I/O power connection)

• Operating Temperature: 0°C to +60°C (32°F to 140°F)

• Mounting: 35mm DIN Rail or Panel Mount

• Weight: 0.64 lbs (0.29 kg)

• Certifications: CE, UL, CSA compliant