Product Overview
The Allen-Bradley 1769-ECR is a Right End Cap module from the CompactLogix series by Rockwell Automation. It terminates the FlexBus communication bus at the end of a CompactLogix assembly, ensuring proper signal integrity and system qualification. This component is essential for any CompactLogix configuration, preventing controller errors and stoppages. With a maximum bus current draw of 5 mA at 5V DC, it operates efficiently without adding significant load.
Technical Specifications Breakdown
Key parameters for the 1769-ECR are listed below for quick reference:
| Feature | Specification |
|---|---|
| Module Type | Right End Cap |
| Current Draw at 5.1V DC | 5 mA |
| Current Draw at 24V DC | 0 mA |
| Operating Temperature | 0 to 60 °C (32 to 140 °F) |
| Operating Altitude | 2000 m (6562 ft) |
| Enclosure Type Rating | None (open style) |
| Operating Vibration | 5 g, 10…500 Hz |
| Operating Shock (DIN rail mount) | 20 g |
| Operating Shock (Panel mount) | 30 g |
| Removal and Insertion Under Power (RIUP) | Not supported |
Industry Applications
This end cap is widely used in manufacturing lines, packaging systems, and material handling where CompactLogix controllers manage discrete and process control. Its open-style enclosure suits clean, controlled environments like panel-mounted cabinets. The module ensures reliable bus termination, reducing signal reflection and communication errors in high-vibration settings up to 5 g.
Installation & Setup Guidance
Install the 1769-ECR only with power removed from the system. Lift the bus lever on the adjacent CompactLogix module, align the end cap with the guide slots, and push it gently until flush. Engage the bus lever to close the FlexBus. If resistance is felt, check alignment. Never attempt removal or insertion under power, as it causes controller errors.
Maintenance & Reliability
Inspect the module periodically for secure mounting and clean contacts. Operate within 0-60 °C and avoid condensation (5-95% non-condensing humidity). For zone 2 environments, provide IP54 protection as the open-style enclosure offers no ingress protection. Ensure vibration does not exceed 5 g, 10-500 Hz.
Compatibility & Integration
The 1769-ECR is compatible with all CompactLogix controllers from Series A and B. It works with any 1769 I/O module in the assembly, terminating the bus on the rightmost module. Verify system compatibility with your specific controller revision before ordering.
Selection Guide & Purchasing Advice
Choose the 1769-ECR for any CompactLogix system requiring bus termination. It is a current product, but verify lifecycle status with SpareTechPLC before ordering. SpareTechPLC offers genuine Allen-Bradley parts with competitive pricing and fast shipping.
Troubleshooting & Common Issues
If the system reports a bus error, ensure the end cap is properly installed and the bus lever is fully engaged. Check for physical damage or loose connections. Since RIUP is not supported, always power down before inspection. If errors persist, verify compatibility with the controller series.
