Product Introduction
The Allen-Bradley 1794-OB32P is a FLEX I/O digital DC output module designed to deliver robust control in demanding industrial environments. This electronically protected module provides 32 sourcing output channels at 24V DC, safeguarding against overcurrent, short circuits, and thermal overloads. Its individual channel protection ensures that a fault on one output does not compromise the entire module, minimizing downtime and maintenance costs.
Technical Specifications
The 1794-OB32P offers key performance metrics that ensure reliable operation:
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Outputs: 32 channels, sourcing current
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On-state Voltage: 10-31.2V DC (nominal 24V DC)
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On-state Current: 500 mA per channel, 14 A per module total (6 A for channels 0-15, 8 A for channels 16-31)
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On-state Voltage Drop: max 0.5V DC
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Off-state Leakage Current: max 0.5 mA
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Isolation Voltage: 50V continuous
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Power Dissipation: 5.3W @ 31.2V DC max
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Thermal Dissipation: 18.1 BTU/hr @ 31.2V DC max
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Operating Temperature: 0 to 55°C (32 to 131°F)
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Storage Temperature: -40 to 85°C (-40 to 185°F)
Industry Applications
The 1794-OB32P excels in applications requiring high-density discrete control with robust protection. Typical use cases include:
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Machine Tool Control: Actuating solenoids and relays in CNC machines, where individual channel protection prevents cascading failures.
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Conveyor Systems: Driving indicator lights and motor starters, ensuring reliable operation even under electrical stress from long cable runs.
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Packaging Lines: Controlling pneumatic valves and sensors, where fast switching (0.5 ms off-to-on, 1 ms on-to-off) is critical for high throughput.
Installation & Setup Guidance
Mount the 1794-OB32P on a DIN rail using compatible terminal bases 1794-TB32 or 1794-TB32S. Ensure proper wire sizing as per the terminal base manufacturer’s guidelines. The module is open-type, so install it in a suitable enclosure to meet environmental and safety requirements. Connect the 24V DC supply to the appropriate terminals; the module draws 80 mA @ 5V DC from the FlexBus. Use the yellow status indicators for quick channel diagnostics.
Maintenance & Reliability
Regularly inspect the 1794-OB32P for signs of overheating or physical damage. Clean the module and terminal base to prevent dust accumulation. The module’s electronic protection reduces wear from electrical faults, extending its service life. With a vibration tolerance of 5g @ 10-500 Hz and operating shock of 30g, it withstands harsh industrial conditions.
Selection Guide & Purchasing Advice
Before purchasing, verify that your system supports FLEX I/O modules and that you have the correct terminal base (1794-TB32 or 1794-TB32S). The 1794-OB32P is a direct replacement for earlier modules in the same series. For bulk orders or technical support, contact UBEST Automation—your trusted partner for industrial automation spares. We offer genuine Allen-Bradley products at competitive prices.