Compact I/O Right-to-Left Bus Expansion Cable Allen-Bradley 1769-CRL1
Manufacturer: Allen Bradley
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Part Number: 1769-CRL1
Condition：New with Original Package
Product Type: Expansion Cables
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Allen-Bradley 1769-CRL1 Compact I/O Bus Expansion Cable
The Allen-Bradley 1769-CRL1, also cataloged as the 1769-CRL1 Expansion Cable, operates as a dedicated hardware component for extending backplane logic communication across separate module banks within CompactLogix and MicroLogix 1500 systems. The device routes parallel data paths and distributes electrical power from the right end of a preceding I/O bank to the left end of a subsequent I/O bank. This connection maintains continuous bus structure and execution timing profiles between separated system chassis segments.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-CRL1 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.28 kg |
| Dimensions | 1 ft cable length layout profile |
| Operating Temp | 0 to +60 deg C |
| Storage Temp | -40 to +85 deg C |
| Power Consumption | 33.6 W maximum system capacity loading |
| Power Dissipation | 7.5 W thermal loss coefficient |
| Backplane Current Draw | 1.4 A @ 24 VDC |
| Isolation Voltage | 30 V continuous insulation boundary |
| Expansion Direction | Right-to-Left bank positioning |
| Relative Humidity | 5% to 95% non-condensing |
| Certifications | CE, UL, CSA |
Deterministic Backplane Bus Communication
The hardware assembly maintains low-latency signal distribution across split expansion chassis, ensuring firmware flash compatibility and keeping I/O density scaling synchronous with the main controller cycles. The dedicated cable layout maintains stable signal propagation rates through shielded internal copper paths, suppressing noise injection across the internal 24 VDC rails. Proper installation enforces systemic termination parameters on the system bus, allowing remote I/O data frames to mirror local backplane bus communication velocity constraints without causing packet drop or link corruption.
Frequently Asked Questions
Q: What specific physical orientation does the 1769-CRL1 cable enforce between I/O banks?
A: The conductors are specifically configured to transition from the right-hand terminator interface of a local bank to the left-hand bus receiver on a secondary expansion bank.
Q: Does this bus expansion cable support live module changes or hot-swapping?
A: No, modifying backplane connections or removing expansion cables while the system bus is energized will disrupt communication cycles and can induce processor faults.
Q: How does the cable limit voltage drops across extended bus lengths?
A: The internal lines are optimized for a 1.4 A @ 24 VDC backplane current threshold, maintaining voltage variance within standard tolerances over the fixed 1 ft physical run.
Field Installation Guidelines
- Power Interruption Protocol: Isolate all electrical supply inputs from the CompactLogix power supply before connecting or disconnecting the bus extension terminals.
- Bend Radius Control: Route the flexible conductor section with a gradual sweep, avoiding sharp 90-degree creases to protect internal traces from shearing stresses.
- Locking Tab Engagement: Seat the right-to-left adapter blocks flush into the module side channels and slide the mechanical retention locks forward to verify continuous electrical path grounding.