Product Details
Technical Overview
The 1794-OB8 (Part Number 1794-OB8) is a high-density discrete output component engineered for the Allen Bradley Flex I/O platform. This module provides eight independent sourcing outputs, serving as a critical interface for distributed control systems where modularity and reduced cabinet footprint are required. It facilitates direct communication with the Flexbus to drive various field-side loads such as actuators, indicators, and solenoids.
Designed for industrial resilience, the 1794-OB8 (1794-OB8) utilizes a sourcing configuration, meaning it supplies voltage from the DC common bus to the connected load when activated. The architecture includes opto-isolation to shield internal logic from field-side electrical interference and potential transients.
Detailed Specifications
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Module Type Digital DC Sourcing Output
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Output Quantity 8 Non-isolated Channels
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Operating Voltage Range 10V DC to 31.2V DC (24V DC Nominal)
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Output Current Rating 4.0A maximum per module (0.5A per channel)
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On-state Voltage Drop 0.5V DC maximum
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Off-state Leakage Current 0.5mA maximum
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Flexbus Current Consumption 60mA at 5V DC
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Maximum Power Dissipation 3.3W at 31.2V DC
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Thermal Dissipation 11.2 BTU/hr at 31.2V DC
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Isolation Voltage 50V Continuous (Basic Insulation Type)
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External Power Supply 24V DC Nominal (10V to 31.2V DC range)
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Mounting Configuration Horizontal or Vertical orientation on terminal base
Application Scenarios
The 1794-OB8 (Part Number 1794-OB8) is commonly implemented in decentralized automation architectures across several sectors
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Direct control of 24V DC pneumatic solenoid valves and manifold blocks.
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Operation of small DC relays and motor starters in remote panels.
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Activation of status pilot lights and visual alarm indicators.
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Distributed I/O for material handling systems to minimize long-run wiring.
Technical FAQ
Does this module include the terminal base for wiring?No, the 1794-OB8 (1794-OB8) is the plug-in electronic module only. It must be installed onto a compatible terminal base, such as the 1794-TB2, 1794-TB3, or 1794-TB3S, to facilitate field connections.
What is the functional difference between sourcing and sinking for this unit?As a sourcing module, the 1794-OB8 (Part Number 1794-OB8) sources current to the load. The external field device must be connected to the negative/common side of the power supply to complete the electrical circuit.
Is there integrated short-circuit protection for the outputs?The module is built for industrial durability but does not feature internal electronic short-circuit protection. It is recommended to install external fusing to protect individual channels from overcurrent or wiring faults.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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