1769-ECR Terminator Module Allen-Bradley Right Bus Cap New

Global PLC Spare HUB's Insight

• The 1769-ECR is a functional electronic terminator for the 1769 Compact I/O chassis.
• In Allen-Bradley architecture, it completes the FlexBus communication loop for the CPU.
• Without the 1769-ECR, the controller cannot recognize any modules on the backplane.
• It prevents signal reflection on high-speed data lines, ensuring clean and synchronized logic signals.
• This component is the definitive requirement for a qualified and operational CompactLogix assembly.

Infrastructure Architecture: Bus Termination

• The 1769-ECR functions as the electrical "period" at the end of your PLC configuration.
• It terminates the internal FlexBus circuitry to stabilize high-frequency signaling.
• The unit is constructed for 19-inch rack or panel mounting with high shock resistance.
• Engineered with a specific 5 mA draw to power the active termination resistors within the cap.
• Its presence is a mandatory hardware requirement for all 1769-series modular controllers.

Technical Performance Matrix

• Brand: Allen-Bradley / Rockwell Automation
• Model Number: 1769-ECR
• Module Type: Right End Cap Module / Bus Terminator.
• Bus Current Draw: 5 mA at 5.1V DC (Max).
• Maximum Altitude: 2000 meters (6562 feet) for high-altitude industrial sites.
• Operating Temperature: 0 to 60 °C (32 to 140 °F) ambient.
• Vibration Rating: 5 g operating vibration at 10–500 Hz.
• Shock Rating: 20 g (DIN rail mount) or 30 g (Panel mount).
• Enclosure: Open style (Requires IP54 enclosure for Zone 2 environments).
• Weight: Approximately 130 g (0.286 lb).

Equipment Integration & Applications

• CompactLogix Controllers: Essential for L30, L31, L32, and L35 modular CPUs.
• 1769 Expansion Racks: Must be installed on the last module of any expansion bank.
• Remote I/O Adapters: Required for 1769-ADN or 1769-AENT distributed systems.
• Hazardous Locations: T3C temperature code rated for North American industrial standards.
• System Security: Protects the exposed FlexBus pins from dust and physical damage.

Diagnostic & Installation Capabilities

• FlexBus Termination: Closes the signal loop to prevent data packet corruption.
• Bus Lever Logic: Features a mechanical locking lever to ensure electrical contact stability.
• Alignment Slots: Integrated guide rails prevent pin misalignment during assembly.
• Controller Feedback: The PLC logic identifies the terminator to confirm I/O rack integrity.
• Maintenance: Power must be removed during installation; RIUP is strictly not supported.

Logistics, Warranty, and Support

• Warranty Policy: 12-month comprehensive professional technical warranty included.
• Dispatch Window: Ready for global shipment within 24 to 48 hours.
• Express Delivery: Priority transit available via FedEx, UPS, or DHL.
• Condition: Original manufacturer standard, current product status.

Professional FAQ & Procurement Guide

• Can I use a standard cover instead of a 1769-ECR?
• No. A standard cover lacks the termination resistors required to close the electrical circuit.
• Is the 1769-ECR compatible with both Series A and B modules?
• Yes, it is designed to be universally compatible with all 1769 Compact I/O hardware versions.
• Why does the PLC show an I/O fault even with the cap installed?
• Ensure the bus lever is fully engaged; even a slight misalignment will prevent the bus from closing.
• Does this module consume a slot on the backplane?
• No, the 1769-ECR attaches to the side of the last module and does not count against your I/O slot limit.
• What are the storage requirements for spares?
• Store in a non-condensing environment between -40 to 85 °C to preserve the termination circuitry.

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