Description

Product Description

The Allen-Bradley 1769-ECR serves as the definitive termination point for the CompactLogix 1769 I/O bus. In any modular PLC assembly, maintaining signal integrity is paramount, and this right-hand end cap fulfills that role by completing the internal FlexBus communication loop. Without this component, the controller cannot establish a valid electrical circuit across the backplane, which typically results in a bus fault or prevents the system from entering run mode.

Beyond its electrical function as a bus terminator, the 1769-ECR provides a critical mechanical barrier for the system. It protects the exposed pins of the final I/O module from environmental contaminants such as dust and metallic debris, while also providing structural rigidity to the DIN rail or panel-mounted stack. Furthermore, this module is engineered for high-vibration industrial environments, ensuring that the communication bus remains seated even under mechanical stress.

Because the FlexBus carries active data and power signals, it is essential that users only install or remove the end cap when the system power is completely isolated. Failure to follow this protocol can cause transient electrical arcs that may damage the backplane or the processor itself. This module is compatible with all 1769 CompactLogix controllers and expansion banks, making it a universal requirement for completing a rack.

Technical Specifications

• Manufacturer: Allen-Bradley / Rockwell Automation
• Product Series: CompactLogix 1769
• Module Type: Right-Side Bus Terminator
• Current Draw: 5 mA at 5.1V DC
• Operating Temperature: 0°C to 60°C (32°F to 140°F)
• Vibration Resistance: 5g at 10–500 Hz
• Shock Rating: 30g (Panel Mount) / 20g (DIN Rail Mount)
• Humidity Range: 5% to 95% non-condensing
• Installation Method: Integrated FlexBus lever with guide slots
• Enclosure Rating: Open-style (requires enclosure for IP54 compliance)