Allen-Bradley 1769-CLL3 Bus Expansion Cable
The Allen-Bradley 1769-CLL3, also cataloged as the 1769-CLL3 Bus Expansion Cable, operates as a dedicated hardware component for left-to-left rack interconnection within Allen-Bradley CompactLogix platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-CLL3 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.38 kg (0.84 lbs) |
| Dimensions | 1 m cable length |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | Passive bus extension (0 W) |
| Cable Type | Compact I/O bus expansion (Left-to-Left) |
| Cable Length | 1 m (3.28 ft) |
| Bus Interface | 1769 backplane expansion connectors |
Backplane Bus Communication and Deterministic Networks
The Allen-Bradley 1769-CLL3 expansion cable maintains high-speed backplane bus communication velocity when bridging adjacent CompactLogix I/O banks. Designed for EtherNet/IP deterministic networks, the shielded physical layer prevents signal degradation across extended backplane distances. This link supports seamless I/O density scaling and firmware flash compatibility between connected expansion racks, ensuring consistent data timing without introducing packet transmission latency.
Frequently Asked Questions
Q: Can multiple 1769-CLL3 expansion cables be connected in series to extend bus reach?
A: No, only one expansion cable is permitted per CompactLogix bank, and overall backplane distance and power supply limits must be observed.
Q: Does the 1769-CLL3 cable pass backplane power between interconnected 1769 sub-racks?
A: No, the expansion cable transmits system communication signals and logic data only; an additional 1769 expansion power supply is required on the secondary bank.
Field Installation Guidelines
- Turn off all system power before plugging or unplugging the 1769-CLL3 cable from the backplane expansion ports.
- Align the cable connectors straight with the 1769 bus expansion headers to avoid bending internal contact pins.
- Tighten the integral connector locking screws to secure the cable end housings firmly to the module chassis.
- Route the 1 m expansion cable away from high-voltage AC lines, variable frequency drives, and heavy inductive loads to prevent electromagnetic noise interference.
- Ensure the minimum bending radius of the cable jacket is maintained to avoid stress on the internal signal conductors.
Allen-Bradley 1769-CLL3 Bus Expansion Cable
Allen-Bradley 1769-CLL3 Bus Expansion Cable
The Allen-Bradley 1769-CLL3, also cataloged as the 1769-CLL3 Bus Expansion Cable, operates as a dedicated hardware component for left-to-left rack interconnection within Allen-Bradley CompactLogix platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-CLL3 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.38 kg (0.84 lbs) |
| Dimensions | 1 m cable length |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | Passive bus extension (0 W) |
| Cable Type | Compact I/O bus expansion (Left-to-Left) |
| Cable Length | 1 m (3.28 ft) |
| Bus Interface | 1769 backplane expansion connectors |
Backplane Bus Communication and Deterministic Networks
The Allen-Bradley 1769-CLL3 expansion cable maintains high-speed backplane bus communication velocity when bridging adjacent CompactLogix I/O banks. Designed for EtherNet/IP deterministic networks, the shielded physical layer prevents signal degradation across extended backplane distances. This link supports seamless I/O density scaling and firmware flash compatibility between connected expansion racks, ensuring consistent data timing without introducing packet transmission latency.
Frequently Asked Questions
Q: Can multiple 1769-CLL3 expansion cables be connected in series to extend bus reach?
A: No, only one expansion cable is permitted per CompactLogix bank, and overall backplane distance and power supply limits must be observed.
Q: Does the 1769-CLL3 cable pass backplane power between interconnected 1769 sub-racks?
A: No, the expansion cable transmits system communication signals and logic data only; an additional 1769 expansion power supply is required on the secondary bank.
Field Installation Guidelines
- Turn off all system power before plugging or unplugging the 1769-CLL3 cable from the backplane expansion ports.
- Align the cable connectors straight with the 1769 bus expansion headers to avoid bending internal contact pins.
- Tighten the integral connector locking screws to secure the cable end housings firmly to the module chassis.
- Route the 1 m expansion cable away from high-voltage AC lines, variable frequency drives, and heavy inductive loads to prevent electromagnetic noise interference.
- Ensure the minimum bending radius of the cable jacket is maintained to avoid stress on the internal signal conductors.
