Product Details
Product Overview
The Allen-Bradley 1769-IA8I functions as a high-density discrete input module for the CompactLogix and MicroLogix 1500 controller platforms. This module interfaces 120V AC field devices—such as limit switches, float switches, and push buttons—directly with the PLC backplane. We supply this unit as 100% Brand New and Original, ensuring your control system utilizes components with zero previous electrical stress. The "I" designation confirms individual channel-to-channel isolation, providing the highest level of signal protection for complex electrical environments.
Technical Specifications
| Feature | Specification Details |
| Number of Inputs | 8 Points |
| Voltage Category | 100/120V AC |
| Operating Voltage Range | 79V AC to 132V AC |
| Input Type | Individually Isolated Discrete Input |
| Backplane Current (5V) | 115 mA |
| Off-State Voltage (Max) | 20V AC |
| On-State Current (Min) | 5 mA at 79V AC |
| Termination | Removable Terminal Block (RTB) |
| Weight | 0.33 lbs (0.15 kg) |
Engineering Advantages
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Individual Channel Isolation: The 1769-IA8I provides full electrical isolation between each of its 8 channels. This feature allows you to mix different AC phases or power sources on a single module, effectively eliminating ground loop interference and preventing cross-talk in multi-source control panels.
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Compact Footprint for High-Density Racks: The slim design maximizes DIN rail efficiency. By integrating 8 isolated points into a standard Compact I/O width, it reduces the total enclosure size required for complex machinery, solving the pain point of overcrowded control cabinets.
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Simplified Maintenance with RTBs: The module utilizes a Removable Terminal Block (RTB). This allows technicians to replace a faulty module without disconnecting the field wiring, significantly reducing Mean Time to Repair (MTTR) and preventing wiring errors during hardware swaps.
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Robust Noise Filtering: Internal hardware filtering circuitry prevents nuisance tripping caused by contact bounce or electromagnetic interference (EMI). This ensures that the controller receives clean, debounced signals even when running parallel to high-power motor leads.
FAQs
Q: What is the benefit of the "I" in the 1769-IA8I model number?
A: The "I" stands for Individually Isolated. Unlike standard modules that share a common return, each input on the 1764-IA8I has its own isolated return. This allows you to wire inputs from different 120V AC circuits or different phases without causing a short circuit.
Q: Is this module compatible with MicroLogix 1500 controllers?
A: Yes. The 1769-IA8I works with both CompactLogix processors and MicroLogix 1500 controllers. It connects via the integrated bus interface, allowing you to expand your MicroLogix system's I/O capacity using the same high-quality hardware found in larger platforms.
Q: Does this unit come in the original Allen-Bradley factory box?
A: Yes. We guarantee this product is 100% Brand New. It arrives in the original manufacturer’s packaging with factory seals intact. We do not sell used or refurbished modules, ensuring your safety-critical applications rely on pristine hardware.
Q: Can I use this module to detect 24V DC signals?
A: No. The 1769-IA8I specifically detects 120V AC signals. Applying DC voltage or incorrect AC levels will result in signal failure and potentially damage the internal optoisolators. Always verify field device voltage before termination.
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
Redundant Automation Systems: Ensuring Continuous Uptime in Critical Control Infrastructure
System reliability directly determines operational profitability across high stakes process industries. Modern industrial automation platforms must eliminate single points of failure to prevent catastrophic shutdowns. Deploying fault tolerant architecture safeguards complex facilities against unexpected hardware glitches, network disruptions, and maintenance outages.
Understanding Types of Noise in Electronic Circuits and Control Systems
Signal integrity directly determines measurement accuracy and loop stability across industrial automation environments. Electronic noise introduces unwanted stochastic interference into analog loops, sensor feedback lines, and digital fieldbus networks. Understanding how intrinsic electronic noise and external electromagnetic interference manifest allows control engineers to optimize signal conditioning and shield sensitive instrumentation effectively.
Why 24V DC Power Supplies Standardize Modern Industrial Automation
Industrial control cabinets worldwide rely on 24V DC as the universal power standard for field instrumentation, sensors, and controllers. Walk into any manufacturing plant, and you will find PLCs, human-machine interfaces (HMIs), and smart actuators running on extra-low voltage DC. Standardizing on 24V DC enhances operational safety, lowers cabinet footprint, and maintains steady control performance across factory networks.