Allen-Bradley 1771-EZ PLC-5 High Density Extender Module

Product Overview

The Allen-Bradley 1771-EZ serves as a specialized High-Density Extender PCB designed specifically for the 1771 Universal I/O chassis system. It facilitates physical and electrical extension for troubleshooting and high-density module integration within PLC-5 control architectures. While the manufacturer officially discontinued this component in 2012, we supply this unit as 100% Brand New original stock. This ensures that engineers can maintain, diagnose, or expand critical legacy systems without the risks associated with used or refurbished hardware.

Technical Specifications

The 1771-EZ utilizes a robust PCB design to maintain signal integrity across the 1771 backplane:

Engineering Advantages

The 1771-EZ provides critical functional benefits for technical teams managing established PLC-5 installations:

• Live Diagnostic Accessibility: The extender physically projects the I/O module forward from the chassis. This allows technicians to access test points and internal module components with a multimeter or oscilloscope while the system remains powered and connected to the backplane.

• Signal Integrity Maintenance: High-density PCBs minimize impedance mismatches. The 1771-EZ utilizes precision-engineered traces to ensure that timing-critical data from high-density modules reaches the PLC-5 processor without corruption or signal drop.

• Mechanical Resilience: The 2.00 lbs build quality indicates a reinforced PCB structure. This prevents sagging or mechanical failure when supporting heavy, fully-wired 1771 modules during extended testing phases.

• Elimination of "New-Old-Stock" Risks: We verify that our 100% Brand New units have zero contact wear. Fresh gold-plating on the connectors ensures a low-resistance interface, preventing the intermittent "rack faults" common with oxidized, used extender cards.

FAQs

How does the 1771-EZ assist in troubleshooting high-density modules?

In a standard 1771 rack, the chassis frame hides the side and rear components of an I/O module. The 1771-EZ extends the module outward, providing 360-degree access for thermal imaging or physical probing without disconnecting the field wiring arm.

Can I leave the 1771-EZ in the rack for permanent operation?

While the 1771-EZ supports full electrical functionality, engineers typically use it for diagnostic and commissioning purposes. For permanent installations, ensure the cabinet depth accommodates the additional protrusion of the extended module to prevent interference with the enclosure door.

Does this extender support all 1771 Series modules?

Yes. It interfaces with the standard 1771 Universal I/O backplane. It specifically excels with high-density modules that require stable power and high-speed data throughput across the extension.

How do I ensure a secure connection during use?

Insert the 1771-EZ firmly into the chassis slot until the gold-plated fingers seat fully in the backplane connector. Then, slide the I/O module into the extender's receiving edge. This dual-connection setup requires a stable DIN rail or rack mount to prevent mechanical vibration.