Product Details
Product Overview
The Allen Bradley 1771-KE functions as a high-performance communication interface within the PLC-5 chassis. It bridges the gap between the Data Highway (DH) network and asynchronous RS-232-C devices, enabling seamless data exchange between controllers, computers, and intelligent peripherals. This specific unit arrives 100% Brand New and features a conformal coating, providing superior protection against harsh industrial atmospheres.
Technical Specifications
The 1771-KE module utilizes a rack-mountable design and draws power directly from the PLC backplane, eliminating the need for external power supplies.
| Feature | Specification |
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Product Line | PLC-5 (1771 System) |
| Module Type | Communication Controller |
| Comm Ports | Data Highway and RS-232-C |
| Processor Port Speed | 91.2 kilobaud |
| Backplane Current | 750 mA @ 5V DC |
| Module Power Requirement | 1.2 Amperes @ 5V DC |
| Coating | Conformal Coated (Enhanced Protection) |
| Wiring Arm | 1771-WH |
| Mounting | 1771 Universal I/O Chassis (Rack Mount) |
| Weight | 2.81 lbs (1.28 kg) |
Engineering Advantages
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Protocol Conversion Mastery: The 1771-KE converts Data Highway protocol into standard RS-232-C serial data. This allows legacy PLC-5 systems to communicate with modern diagnostic laptops, printers, and third-party HMI hardware without requiring expensive network overhauls.
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Extreme Environment Resilience: The conformal coating shields the internal circuitry from moisture, dust, and corrosive chemical vapors. This hardware hardening ensures the module maintains 91.2 kilobaud transmission speeds even in facilities with high humidity or airborne contaminants.
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Simplified Integration: The module occupies a single slot in any 1771 I/O chassis. Because it requires zero external power sources, it reduces cabinet heat load and simplifies the wiring architecture within the control enclosure.
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Predictable Signal Timing: With a typical DC signal delay (Off) of 50 ms and an AC delay of 45 ms (+/- 15 ms), the 1771-KE provides the deterministic timing necessary for synchronized data collection across a distributed network.
FAQs
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Does the 1771-KE require a separate power supply?
No. The module draws its required 1.2 Amperes directly from the 1771 chassis backplane. However, you must verify that your chassis power supply has sufficient headroom to accommodate the 750mA backplane current draw of this module alongside other installed I/O.
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How does the conformal coating benefit my installation?
The conformal coat is a specialized thin polymer film applied to the PCB. It protects the 1771-KE against "dendrite growth" and short circuits caused by moisture or salt spray, making it the ideal choice for wastewater, pulp and paper, or coastal industrial sites.
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Which wiring arm should I use for this module?
The 1771-KE requires the 1771-WH wiring arm. Using the correct arm ensures secure terminal connections and facilitates the "swing-away" design for fast module replacement without disconnecting individual field wires.
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Can this module interface with Data Highway Plus (DH+)?
The 1771-KE is specifically designed for the standard Data Highway protocol. For Data Highway Plus (DH+) applications, engineers typically utilize the 1770-KF2 or similar bridge modules, though the 1771-KE remains the industry standard for original Data Highway to RS-232-C conversion.
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 Marshalling Cabinets in Industrial Control Systems Architecture
Industrial control system deployments rely on structured signal distribution to bridge field instrumentation with central processing hardware. A marshalling cabinet serves as the vital intermediate connection point between heavy field home-run multi-pair cables and delicate input/output (I/O) modules housed inside Programmable Logic Controller (PLC) or Distributed Control System (DCS) enclosures. By segregating field cable terminations from control hardware, engineers maintain system flexibility, safeguard controller components, and streamline commissioning workflows.
FAT vs SAT in Industrial Control Systems: Key Differences and Execution Guide
Industrial control system deployment relies on strict verification protocols to guarantee operational safety, system stability, and regulatory compliance. Commissioning complex Programmable Logic Controller (PLC) racks, Distributed Control Systems (DCS), and Safety Instrumented Systems (SIS) requires two critical milestones: the Factory Acceptance Test (FAT) and the Site Acceptance Test (SAT). Both procedures validate that system automation meets design specifications, but they occur at different stages of project execution and target distinct operational risks.
Hub vs Switch vs Router in Industrial Automation Architecture
Modern factory automation relies on reliable industrial networking infrastructure to exchange real-time field data across operational technology systems. Engineers often encounter networking hardware like hubs, switches, and routers when integrating Programmable Logic Controllers, Distributed Control Systems, and SCADA monitoring nodes. Although these devices share physical ports, they operate at different layers of the Open Systems Interconnection reference model and deliver distinct traffic management capabilities.