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

What Is the 1769-ECR?

When building a CompactLogix system, terminating the bus correctly is critical. The 1769-ECR from Allen-Bradley is a Right End Cap module designed to close the FlexBus circuitry on a CompactLogix assembly. It signals the end of the I/O or communication module chain, preventing data errors and ensuring stable operation. Manufactured by Rockwell Automation, this module is part of the CompactLogix series and is available in Series A and B revisions.

Key Features & Technical Specs

• Maximum bus current draw: 5 mA at 5 volts DC.
• Current draw at 5.1V DC: 5 mA; at 24V DC: 0 mA.
• Operating temperature range: 0 to 60 °C (32 to 140 °F).
• Operating altitude: 2000 m (6562 ft).
• Enclosure type rating: None (open style).
• Removal and Insertion Under Power (RIUP): Not supported.
• Operating vibration: 5 g at 10 to 500 Hz.
• Operating shock: 20 g (DIN rail mount), 30 g (panel mount).
• Shipping weight: approximately 130 g (0.286 lb).

One distinctive spec is the 5 mA bus current draw. This low power requirement means the 1769-ECR adds negligible load to the backplane, preserving power for active I/O modules and reducing overall system heat.

Installation Guide

Installing the 1769-ECR requires power to be removed from the system. First, lift the bus lever on the last CompactLogix module to disengage it. Then, align the end cap with the guide slots and push it gently until it sits flush against the module. Finally, engage the bus lever to close the FlexBus connection. If resistance is felt, check alignment—forcing the lever can damage the bus.

Maintenance & Reliability

Because the 1769-ECR has no active electronics, it requires minimal maintenance. However, periodic inspection is recommended to ensure the bus lever remains securely engaged and the module is free of dust or debris. The open-style enclosure means the system should be installed in a clean, dry environment. Operating within the specified temperature (0–60 °C) and vibration limits (5 g) will maximize service life.

Compatibility & Integration

The 1769-ECR is designed exclusively for the CompactLogix product line. It works with all 1769-series controllers and I/O modules. The module is not compatible with other platforms such as ControlLogix or MicroLogix. For proper integration, place the end cap on the rightmost module of the assembly—never in the middle or left side.

FAQs about 1769-ECR

Q: Can the 1769-ECR be installed while the system is powered?

A: No. Removal and Insertion Under Power (RIUP) is not supported. Always power down the system before installation or removal to prevent controller errors.

Q: What is the current draw of the 1769-ECR?

A: The maximum bus current draw is 5 mA at 5 volts DC. At 5.1V DC, it draws 5 mA; at 24V DC, it draws 0 mA.

Q: What is the operating temperature range?

A: The 1769-ECR operates from 0 to 60 °C (32 to 140 °F).

Q: Does the 1769-ECR support shock and vibration?

A: Yes. It withstands 5 g vibration at 10–500 Hz and shock of 20 g (DIN rail) or 30 g (panel mount).

Product Support & Availability

The 1769-ECR is a current product and is in stock at Petro Auto Tech. As a trusted industrial automation parts supplier, Petro Auto Tech offers fast shipping and competitive pricing. Contact us for bulk orders or technical inquiries.