Features:
- Remote I/O Interface for PLC-2, PLC-3, PLC-5/250, PLC-5, and SLC 5/02 Controllers
- Integrates Programmable Controller Interface, Power Supply, I/O Connections, and Signal Generation in One Block
- Functions as a Cost-Effective Distributed I/O Solution for Packaging, Material Handling, and Operator Interface Applications
The Allen-Bradley 1791-OB32 serves as a 32-point discrete DC block I/O module, delivering 24V DC output capability to field devices across industrial automation systems. It continuously processes output signals through 32 discrete channels, providing 500mA per output at 60°C for vertical mounting or 250mA per output at 60°C for horizontal mounting, with signal delays of just 0.5ms at turn-on and 1.0ms at turn-off. Seamless communication is standard with the 1791-OB32 through Universal Remote I/O protocol, while removable terminal strips eliminate rewiring requirements during module replacement or maintenance activities.
The 1791-OB32 provides essential I/O functions for distributed control architectures, serving as a critical component of the remote I/O path that directly affects the proper, normal operation of packaging lines, conveyor systems, and machine control panels. One 1791-OB32 module supports 32 discrete outputs and requires 300mA current at 24V DC nominal voltage. The 1791-OB32 occupies minimal enclosure space and can be mounted in vertical or horizontal orientations depending on thermal management requirements and output current derating needs.
For high-density output applications, the 1791-OB32 delivers reliable switching with a maximum On-state voltage drop of 1V at rated current and maximum Off-state leakage current of 0.5mA. In addition to standard output operation, the module provides comprehensive status indication. The 1791-OB32 monitoring system continually tracks communication health, module status, and individual I/O states through 1 COMM indicator, 1 STATUS indicator, and 16 I/O Status indicators. Using this method, maintenance personnel can quickly identify fault conditions without specialized diagnostic equipment. If the system detects communication errors or output faults, the LED indicators provide immediate visual feedback for streamlined troubleshooting procedures.
The 1791-OB32 Allen-Bradley Discrete Block I/O Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Allen-Bradley 1791-OB32 Discrete Block I/O Module Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Allen-Bradley 1791-OB32 Discrete Block I/O Module Specs
General
- Manufacturer Allen-Bradley
- Model 1791-OB32
- Condition New Original ready stock
- Product Family 1791-OB32P,1791-OA32,1791-0B32
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Switching Discrete Loads: Activating 24V DC field devices such as solenoids, pilot lights, and relay coils.
- Remote Machine Control: Placing I/O closer to sensors and actuators to reduce wiring and installation time.
- Legacy System Integration: Compatibility with older controllers like the PLC-2, PLC-3, PLC-5, and SLC 5/02 systems.
- Panel Space Optimization: Its compact, self-contained design (including its own power supply and interface) allows for high-density output control in limited cabinet space.
- Signal Delay: Fast response times with a maximum delay of 0.5 ms for ON and 1.0 ms for OFF states.
- Status Indicators: Features 18 LED indicators for rapid troubleshooting.
- 1 COMM LED for communication status. 1 STATUS LED for module health. 16 I/O Status LEDs (typically toggled between two groups to monitor all 32 outputs).
- Configuration: Includes two DIP switch assemblies to set the rack number, starting I/O group, and transmission rate.
- Operating Temperature: 0°C to 60°C (32°F to 140°F).
- Storage Temperature: -40°C to 85°C (-40°F to 185°F).
- Relative Humidity: 5% to 95% (Non-condensing).
- Thermal Management: Requires a minimum clearance of 2.0 inches (50.8 mm) on all sides for proper airflow and cooling.