1769-ECR Allen-Bradley Right End Cap | CompactLogix Terminator

Product Overview – 1769-ECR Right End Cap

The Allen‑Bradley 1769‑ECR is the dedicated right‑end terminator for CompactLogix systems. It closes the FlexBus communication bus, ensuring signal integrity and proper system recognition. This module is mandatory for any 1769 controller assembly. It draws only 5 mA at 5.1 V DC and weighs 130 g (0.286 lb). Designed for panel or DIN‑rail mounting, it operates from 0 to 60 °C and withstands vibration up to 5 g at 10‑500 Hz.

Technical Specifications – 1769-ECR

• Brand / Manufacturer: Allen‑Bradley (Rockwell Automation)
• Model / Part No.: 1769‑ECR
• Series: CompactLogix
• Module Type: Right End Cap / Bus Terminator
• Current Draw (5.1V DC): 5 mA (max)
• Current Draw (24V DC): 0 mA
• Operating Altitude: 2000 m (6562 ft)
• Operating Temperature: 0…60 °C (32…140 °F)
• Storage Temperature: -40…85 °C (-40…185 °F)
• Relative Humidity: 5‑95 % non‑condensing
• Vibration (Operating): 5 g, 10‑500 Hz
• Shock (DIN rail): 20 g / (Panel): 30 g
• Enclosure Rating: Open style (IP20 when installed)
• UPC: 10662468993040
• Shipping Weight: approx. 0.286 lb (130 g)

Installation & Wiring – Quick Guide

• Always remove system power before installing or removing the 1769‑ECR.
• Lift the bus lever on the adjacent CompactLogix module.
• Align the ECR with the guide slots and push gently until flush.
• Engage the bus lever to close the FlexBus – do not force.
• For Zone 2 environments, provide IP54 enclosure protection.
• No RIUP (Removal/Insertion Under Power) – power down first.

Diagnostics & Status Indication

• No onboard LED – the module is passive.
• System verifies correct termination via controller status.
• If controller fails to recognize the assembly, check ECR seating.
• Resistance during bus lever engagement indicates misalignment.

Certifications & Environmental Compliance

• Temperature Code (North America): T3C
• IEC Temp Code: T4
• Operating Altitude: 2000 m (6562 ft)
• RoHS / WEEE: Compliant
• Marine / Hazardous: Not rated; use IP54 in Zone 2
• Tested for dry heat, cold, and thermal shock per IEC standards

Oiltech Controls’s Insight – Why Choose This End Cap?

• The 1769‑ECR is not optional – it is required for every CompactLogix system.
• It prevents bus reflections and communication errors.
• Compatible with all 1769 controllers (L1, L2, L3, L4 series).
• Passive design means zero configuration – plug and protect.
• Always keep a spare ECR to avoid downtime during maintenance.

Compatible Equipment – Suitable For

• Allen‑Bradley CompactLogix 1769‑L16, L18, L24, L27, L30, L33, L36, L43, L45.
• Any 1769 I/O chassis or expansion assembly.
• Systems requiring FlexBus termination.
• Panel mount or DIN‑rail mount configurations.

Frequently Asked Questions (FAQ) – Expert Selection Guide

Q1: Is the 1769‑ECR required for every CompactLogix system?
Yes. Without it, the controller will not recognize the I/O assembly and will flag a configuration error. Always install it on the rightmost slot.

Q2: Can I remove or insert the 1769‑ECR while the system is powered?
No. RIUP is not supported. Removing or inserting under power will cause a controller fault and stop the process. Always power down first.

Q3: What is the difference between series A and B?
Both are functionally identical. Series B has minor manufacturing updates but remains fully interchangeable with series A.

Q4: How do I verify the ECR is properly installed?
After engaging the bus lever, check that the controller status LED shows normal operation. If the controller indicates a missing end cap, reseat the ECR and ensure the lever is fully closed.

Q5: What spare parts should I keep for my CompactLogix system?
At minimum, keep one 1769‑ECR as a spare. It is a low‑cost critical component. Also keep spare power supplies and communication modules for high‑availability systems.

Why Buy From Oiltech Controls?

• 15+ years supplying industrial automation spares – we know your system.
• Fast global shipping via FedEx, UPS, or DHL (24‑28 hours dispatch).
• All surplus / refurbished units are tested before shipment.
• 12‑month warranty on every 1769‑ECR.
• Technical verification ensures part compatibility with your system.
• Expert support for obsolete and legacy control systems.

Contact Information
Email: info@oiltechcontrols.com
Phone / WhatsApp: +86 158 8020 0923

Package includes: 1769‑ECR module only. Cables and mounting hardware sold separately.

Shipping: FedEx, UPS, DHL – express delivery worldwide. Orders ship within 24‑28 hours.

Warranty: 12 months against manufacturing defects.

Original Source: https://www.oiltechcontrols.com/

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