Product Details
Product Overview
The Allen-Bradley 1794-OB8EPXT serves as a ruggedized discrete output module within the FLEX I/O family, specifically engineered for extreme environmental conditions. This module provides 8 independent sourcing outputs at 24V DC, interfacing high-speed industrial controllers with field actuators. The "XT" designation signifies its enhanced thermal resilience, allowing the unit to maintain precise logic control in environments where standard hardware fails. We supply this module in 100% Brand New condition, ensuring peak electronic protection and long-term stability for your distributed I/O architecture.
Technical Specifications
The 1794-OB8EPXT integrates high-density output control with advanced circuit protection:
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Output Type: Discrete 24V DC Sourcing (Current Sourcing)
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Number of Points: 8 Protected Outputs
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Operating Voltage: 24V DC (Nominal)
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Protection Type: Electronic Fusing (Short-circuit and Overload protection)
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Operating Temperature: Extended Range (-20°C to +70°C / -4°F to +158°F)
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Mounting: DIN Rail (via Terminal Base)
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Enclosure Rating: IP20 Open Style
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Weight: 0.20 lbs (0.09 kg)
Engineering Advantages
The 1794-OB8EPXT addresses critical failure points in decentralized automation systems:
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Extreme Thermal Resilience: The XT hardware eliminates the need for specialized cooling or heating equipment in control cabinets. It operates reliably from -20°C to +70°C, making it the standard choice for oil and gas, outdoor infrastructure, and non-climate-controlled factory floors.
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Self-Recovering Electronic Fusing: Each output features electronic fusing. This technology detects overcurrent or short-circuit conditions instantly, shutting down the affected channel to protect the internal circuitry and the rest of the I/O rack without requiring physical fuse replacement.
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Reduced Footprint: The compact FLEX I/O design minimizes rail space. By combining 8 high-current sourcing outputs into a 0.20 lb module, engineers can decrease cabinet sizes and reduce overall system weight.
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Vibration and Shock Resistance: The "XT" manufacturing process involves additional coating and component hardening. This protects the module against the mechanical stresses found in heavy-duty machinery and mobile industrial platforms.
FAQs
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What makes the "XT" version different from the standard 1794-OB8EP?
The 1794-OB8EPXT utilizes components and manufacturing techniques rated for an extended temperature range (-20°C to +70°C). Standard modules typically only support 0°C to 55°C.
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Does this module require a separate terminal base?
Yes. The 1794-OB8EPXT mounts onto a 1794 terminal base (such as the 1794-TB3 or 1794-TBN). The base provides the field-side wiring terminations and the connection to the FLEX I/O backplane.
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Is this unit a Brand New original product?
Yes. We guarantee that this 1794-OB8EPXT is 100% Brand New in its original factory condition. This ensures the electronic fusing and thermal ratings meet the manufacturer's strict safety and performance benchmarks.
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How does the electronic fusing reset?
The module monitors the load condition. Once you remove the fault (short circuit or overload) and cycle the output or power, the electronic fuse resets automatically, significantly reducing system downtime compared to traditional glass fuses.
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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Why Programmable Logic Controllers Drop into Stop Mode: An Expert Analysis
Industrial automation systems rely heavily on Programmable Logic Controllers (PLCs) to maintain uninterrupted production. When a PLC unexpectedly shifts from Run to Stop mode, whole manufacturing lines stall.
As control systems evolve across modern factory automation, understanding the root causes of these interruptions helps engineers minimize costly downtime. This technical guide breaks down why PLCs trip into Stop mode and provides practical strategies to mitigate system faults.
Understanding Root Causes of Unplanned PLC Stop Mode in Industrial Automation
Modern Programmable Logic Controllers manage execution through distinct operational states: Run, Stop, Start-Up, and Hold. During power-up, a controller initializes memory registers within Stop mode before briefly transitioning to Start-Up mode. During this phase, internal self-diagnostics evaluate system integrity across hardware and user programs. If the controller detects no critical faults, it enters Run mode to execute the control program continuously. However, any severe system anomaly forces the CPU back into Stop mode immediately to prevent erratic machine behavior across the plant floor.