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Description
The Allen-Bradley 1769-CLL3 is a specialized bus expansion cable designed for use with CompactLogix and MicroLogix 1500 controller systems. This cable is specifically engineered as a Left-to-Left expansion type, enabling the connection of the left side of one I/O bank to the left side of another. It is an essential component for complex enclosure layouts where standard Right-to-Left cabling configurations are not feasible, such as vertical mounting or back-to-back bank arrangements.
Features
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Left-to-Left Configuration: Facilitates flexible I/O bank orientation and layout within control cabinets.
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High-Speed Communication: Maintains signal integrity across the 1-meter span, ensuring reliable data transfer between I/O banks.
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System Compatibility: Fully compatible with the Allen-Bradley 1769 Compact I/O platform.
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Robust Design: Built to withstand industrial environmental conditions, including vibration and temperature fluctuations.
Applications
This expansion cable is primarily used in industrial automation systems where physical space constraints or specific enclosure designs require the separation of I/O banks. It is commonly deployed in CompactLogix and MicroLogix 1500 architectures that exceed the capacity of a single DIN-rail or require modular, multi-bank distribution.
Technical Specifications
| Part Number |
1769-CLL3 |
| Brand |
Allen-Bradley |
| Product Line |
CompactLogix / Compact I/O |
| Cable Type |
Expansion Cable (Left-to-Left) |
| Cable Length |
1 m (3.28 ft) |
| Operating Temperature |
0 to 60 degC (32 to 140 degF) |
| Storage Temperature |
-40 to 85 degC (-40 to 185 degF) |
| Operating Humidity |
5% to 95% (non-condensing) |
| Vibration (Operating) |
10 to 500 Hz, 5g |
| Weight |
0.38 kg (0.84 lbs) |
Installation Guidelines
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Power Down: Always disconnect power from the I/O system before connecting or disconnecting expansion cables to prevent electrical damage.
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Bank Limitations: Ensure the system configuration does not exceed the maximum limit of two expansion cables and three total I/O banks.
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Power Supply Requirements: Each I/O bank connected via an expansion cable requires its own dedicated 1769 power supply to ensure adequate current distribution.
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Cable Routing: Route cables away from high-voltage lines, motor starters, and other sources of electromagnetic interference (EMI) to maintain signal integrity.
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ESD Precautions: Handle the cable connectors with care, avoiding contact with pins to prevent electrostatic discharge damage.
FAQ
What is the maximum number of expansion cables supported by a 1769 system?
A 1769-based system supports a maximum of two expansion cables and three total I/O banks.
Does the 1769-CLL3 provide power to the connected I/O bank?
No, the expansion cable is for communication bus extension only. Each I/O bank must be powered by its own local 1769 power supply.
