Product Details
Product Overview
The Allen Bradley 1756-OF8IK functions as a high-performance, isolated analog output module for the ControlLogix platform. It provides eight independent current output channels to drive field devices such as actuators, valves, and motor controllers. This specific model features factory-applied conformal coating (indicated by the "K" suffix), which provides essential protection against corrosive atmospheres and humidity. By utilizing channel-to-channel isolation, the 1756-OF8IK eliminates ground loop interference and ensures high-integrity signal delivery in complex industrial environments.
Technical Specifications
| Feature | Detailed Specification |
| Manufacturer | Allen Bradley / Rockwell Automation |
| Part Number | 1756-OF8IK |
| Module Type | Isolated Analog Output (Current) |
| Number of Outputs | 8 Channels (Individually Isolated) |
| Output Range | 0–20 mA or 4–20 mA |
| Resolution | 15 Bits |
| Output Voltage Range | 5–30V DC |
| Current Draw (24V DC) | 400 mA |
| Power Dissipation | 6.5 Watts |
| Isolation Voltage | 50V Continuous |
| Removable Terminal Block | 1756-TBNH, 1756-TBSH |
| Condition | 100% Brand New Original |
Engineering Advantages
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Channel-to-Channel Isolation: The 1756-OF8IK isolates each of its eight outputs individually. This prevents electrical noise and ground loops from propagating between loops, solving common signal distortion issues in large-scale facilities where field devices reside at different potential levels.
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Conformal Coating for Harsh Service: The "K" version includes a specialized protective layer over the internal circuitry. This barrier resists chemical vapors, salt spray, and moisture, making this module the mandatory choice for wastewater treatment, oil and gas, and chemical processing plants.
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High-Resolution Control: The 15-bit digital-to-analog converter ensures granular control over current loops. This precision allows the PLC to modulate control valves with extreme accuracy, optimizing process efficiency and reducing mechanical wear caused by "stepped" movements.
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Robust Fault Containment: Channel isolation ensures that a short circuit or electrical fault on one field device does not impact the remaining seven channels. This containment strategy minimizes system downtime and protects the overall integrity of the ControlLogix chassis.
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Simplified Maintenance: The module utilizes standard 1756-TBNH or 1756-TBSH terminal blocks. Maintenance teams can replace the module without disconnecting field wires, significantly reducing the Mean Time to Repair (MTTR) during critical hardware swaps.
FAQs
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Is the 1756-OF8IK 100% Brand New?
Yes. We supply this module as 100% Brand New in original factory-sealed packaging. This ensures the conformal coating is fully intact and the hardware meets the latest OEM specifications.
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Can the 1756-OF8IK drive voltage loads?
This specific model is optimized for current outputs (0–20mA or 4–20mA). For applications requiring ±10V voltage outputs, we recommend selecting the 1756-OF8 or the isolated 1756-OF6VI models.
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Does the module require an external power supply?
Yes, the module draws 400 mA at 24V DC from the backplane or an external user-supplied 24V source to power the isolated current loops. Ensure your chassis power supply has sufficient headroom for the 6.5W dissipation.
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What is the difference between 1756-OF8I and 1756-OF8IK?
The "K" suffix in 1756-OF8IK indicates the addition of conformal coating. Both modules share identical electrical performance, but the "K" model provides superior resistance to environmental corrosion.
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
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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.