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- Allen-Bradley CompactLogix 1769-ECR Right End Cap Bus Terminator
SKU: 1769-ECR
Allen-Bradley CompactLogix 1769-ECR Right End Cap Bus Terminator
The Allen-Bradley 1769-ECR is a right-side bus termination end cap for CompactLogix and MicroLogix 1500 systems. It terminates the integrated FlexBus backplane to ensure signal integrity, prevent communication packet reflection, and maintain stable PLC operations.
Product Overview and Functional Role
The Allen-Bradley 1769-ECR serves as the definitive mechanical and electrical termination point for the proprietary FlexBus backplane. Operators must install this component on the right-hand side of the final expansion I/O bank or controller bank within a 1769-based chassis system. Because the internal communication network utilizes high-frequency data transmission, the system requires proper impedance matching to prevent signal reflections. Consequently, the controller will trigger a major backplane fault and halt system operations if it detects a missing end cap.
Technical Specifications and Environmental Ratings
- Brand: Allen-Bradley / Rockwell Automation
- Part Number: 1769-ECR
- Module Series: CompactLogix / MicroLogix 1500 System
- Component Classification: Right-Hand Bus Terminator
- Current Draw at 5.1V DC: 5 mA
- Operating Temperature Range: 0°C to 60°C (32°F to 140°F)
- Storage Temperature Limits: -40°C to 85°C (-40°F to 185°F)
- Relative Humidity Range: 5% to 95% (non-condensing)
- Maximum Operational Altitude: 2000 meters (6561 feet)
- Operational Shock Rating on DIN Rail: 20g
- Operational Shock Rating on Panel Mount: 30g
- Operational Vibration Tolerance: 5g at 10 to 500 Hz
- System Protection Standard: Open-style enclosure (requires IP54 certified enclosure for Zone 2 industrial areas)
- Physical Product Dimensions: 3.5 cm x 13.0 cm x 14.5 cm
- Approximate Net Weight: 130 grams (0.286 lbs)
Installation Guidelines and Safety Protocols
Engineers must strictly adhere to specific safety procedures during hardware integration. To prevent hardware damage, technicians must isolate the primary power supply before they slide the end cap onto the rightmost module. The integration process requires users to align the module guide slots precisely and then engage the integrated bus lever to lock the circuit. Conversely, removing the terminator while the system is active will cause immediate logic execution faults, which can lead to unpredictable machinery behavior or sudden production shutdowns.
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Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 2094-BM02-S |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.9 kg |
| Dimensions | 3.5 x 13 x 14.5 cm |
| Operating Temp | 0 to +50 deg C (Standard Industrial Range) |
| Power Consumption | 650 VDC nominal input / 115 Ohm internal shunt resistor |
| Module Type | Servo Drive (Axis Module) |
| Product Range | ControlLogix / Kinetix 6000 |
| System Classification | PLC Motion Control |
| Continuous Current | 10.3 A (RMS), 14.6 A (Sine Peak) |
| Velocity Loop Bandwidth | 500 Hz |
| Current Loop Frequency | 1300 Hz |
| Efficiency Rating | 98% |
Industrial Control & Deterministic Driving Network
The Allen-Bradley 2094-BM02-S interacts directly over backplane bus communication velocity networks to achieve microsecond-level synchronization across adjacent drive modules. The hardware features deterministic network compatibility, letting control processors command motion trajectories with minimal jitter. It supports peak enhancement technology, scaling the nominal inverter output profile from a standard 150% threshold up to 250% during peak torque demands. This scaling permits rapid rotor acceleration and deceleration profiles without triggering overcurrent trips. Integrated Safe-Torque Off (STO) hardware circuits provide independent physical galvanic control paths, disabling gating signals to the output power transistors to prevent unexpected motor rotation during active maintenance states.Frequently Asked Questions
Q: What are the backplane current and configuration limits when expanding axis modules on a single rail?A: The module must be inserted into an authorized Kinetix 6000 power rail, supporting up to seven axis modules alongside one master power module. The cumulative peak current draw must not exceed the structural rating of the shared copper backplane link.Q: Is this hardware compatible with live hot-swapping procedures?A: No. The shared 650 VDC bus lines pose arc-flash and component damage hazards. System DC bus voltage must be entirely drained and verified below safe thresholds before seating or unseating the module from the rail structure.Q: Can the internal 115 Ohm shunt resistor handle high-inertia braking loads?A: The internal shunt resistor is designed for short-duration thermal dissipation. High-inertia or cyclic deceleration applications require an external, isolated shunt module to prevent DC bus overvoltage faults.Field Installation Guidelines
- Enclosure Clearance & Thermal Profile: Maintain a minimum enclosure installation depth of 10.7 inches. Ensure unimpeded vertical ventilation spacing above and below the module chassis to prevent heat sink thermal saturation.
- Cable Separation Architecture: Physically isolate unshielded high-voltage power cables, including motor leads and shunt resistor lines, from low-level digital feedback encoder loops and communication wires to suppress cross-talk.
- Shielding and Ground Boundary: Terminate all motor cable shields at the designated grounding clamp on the power rail base. Maintain a low-impedance ground plane across the entire mounting subpanel.
- Overcurrent Protection: Install specified circuit breakers or high-speed semiconductor fuses upstream of the main power distribution block to guard the internal solid-state components against phase-to-phase short circuits.
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