Product Details
Product Description
The Allen Bradley 1794-OB8EP FLEX I/O module delivers eight current-sourcing digital outputs, engineered for reliable performance in distributed control systems. Designed for use with multiple terminal base units, it provides fast signal response, electronic output fusing, and robust isolation for industrial automation environments.
Technical Specifications
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Manufacturer Allen Bradley
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Product Line FLEX I/O
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Module Type Digital DC Output Module
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Part Number 1794-OB8EP
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Outputs 8 current-sourcing channels
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Recommended Terminal Bases 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TB3K, 1794-TB3SK, 1794-TBNK
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On-State Voltage Range 19.2 V DC (min) to 31.2 V DC (max), nominal 24 V DC
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Output Current Rating Up to 2.0 A per channel, maximum 10.0 A per module
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On-State Current 1.0 mA minimum, 2.0 A maximum per channel
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Voltage Drop (On-State) ≤ 0.2 V DC
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Surge Current 4 A for 50 ms, repeatable every 3 seconds
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Off-State Leakage Current ≤ 0.5 mA
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Isolation Voltage 50 V continuous, tested at 850 V DC for 1 s (field-to-system); no channel-to-channel isolation
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Signal Delay 0.1 ms (Off to On / On to Off)
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FlexBus Current 73 mA @ 5 V DC
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Power Dissipation 5.5 W max @ 31.2 V DC
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Thermal Dissipation 18.8 BTU/hr max @ 31.2 V DC
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Fusing Outputs electronically fused
Application Scenarios
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Distributed control systems requiring multiple DC outputs
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Industrial automation panels with compact I/O requirements
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High-speed digital output applications with strict timing needs
FAQ
Q: How many outputs does the 1794-OB8EP provide? A: It offers 8 current-sourcing digital outputs.
Q: What terminal bases are compatible with this module? A: It supports 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TBN, 1794-TB3K, 1794-TB3SK, and 1794-TBNK.
Q: Does the module include output protection? A: Yes, all outputs are electronically fused for safety and reliability.
Comparable Models
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1794-OB8EP: 8-point DC output module (this model)
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1794-OB16: 16-point DC output module for higher density
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1794-IB16: 16-point input module for digital signal acquisition
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
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.
Human-Machine Interface Design: Essential Guide to HMI Selection, Visualization, and Control System Integration
Human-Machine Interfaces (HMIs) serve as the primary operational window into complex industrial automation systems. Modern HMIs convert raw machine data into clear graphical displays, enabling operators to oversee entire manufacturing processes in real time. Instead of relying on physical control panels full of hardwired switches, engineers program interactive screens using intuitive graphics, dynamic color coding, and responsive touch interfaces. Over my 15 years in control systems engineering, I have observed HMIs transform from basic display screens into sophisticated command centers that drive operational efficiency across DCS and PLC environments.
Understanding Safety Relays in Industrial Automation: Architecture, Operation, and Functional Safety
Standard electromechanical relays provide basic electrical isolation between low-voltage control circuits and high-power output loads. A traditional switching relay features a magnetic coil driving mechanical Common (COM), Normally-Open (NO), and Normally-Closed (NC) contacts. However, standard relays pose severe functional risks when deployed in critical safety interlock circuits. High current inrush or mechanical wear can weld contacts together permanently. If contact welding occurs in an emergency stop circuit, pressing the button fails to halt hazardous machinery movements. Consequently, global functional safety standards prohibit standard relays for critical machine guarding functions.