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The 6ES5705-0BB50 functions as a connection cable for the Siemens SIMATIC S5 PLC system. This unit links an expansion unit to the central controller for I/O bus extension. It carries all data and power signals between the main rack and expansion chassis. Therefore, this cable enables distributed I/O configurations for larger automation systems.
Technical Specifications
We engineered this connection cable for reliable signal transmission in industrial environments. Its shielded construction minimizes electromagnetic interference from nearby power cables. Moreover, the cable includes keyed connectors for foolproof installation.
| Parameter | Specification |
|---|---|
| Length | 5.0 meters (16.4 feet) |
| Cable Diameter | 8.0 mm (0.31 inches) |
| Weight | 0.45 kg (1.0 lbs) |
| Connector Type (End A) | 20-pin ribbon connector male |
| Connector Type (End B) | 20-pin ribbon connector male |
| Number of Conductors | 20 stranded wires |
| Shielding | Foil shield with braided coverage |
| Jacket Material | PVC (Polyvinyl Chloride) |
| Bend Radius (Min) | 80 mm (3.1 inches) |
| Voltage Rating | 30V DC maximum |
| Current Rating | 1.5 A per conductor |
| Operating Temperature | -20°C to +70°C (-4°F to 158°F) |
Cable Construction and Shielding
The 6ES5705-0BB50 uses dual shielding for maximum noise rejection. A foil layer covers the entire conductor bundle for high-frequency protection. A braided copper shield provides additional low-frequency noise suppression. Consequently, this construction maintains signal integrity even near variable frequency drives.
Connector Design and Locking
This connection cable features 20-pin ribbon connectors on both ends. Each connector includes a polarized key to prevent incorrect orientation. The latches snap securely into place for vibration-resistant connections. Therefore, you cannot insert the cable incorrectly into compatible S5 expansion ports.
Signal and Power Distribution
The 6ES5705-0BB50 carries both data signals and DC power simultaneously. Sixteen conductors transmit I/O bus data between the central controller and expansion unit. Four conductors distribute 5V DC power to the expansion backplane. Thus, a single cable provides complete connectivity without separate power wiring.
Mechanical Flexibility and Routing
This connection cable bends around corners with a minimum 80 mm radius. Its flexible PVC jacket withstands repeated flexing during maintenance activities. The cable lies flat against panels for organized wire management. Use cable ties every 300 mm to secure the cable along its route.
Compatibility and Applications
The 6ES5705-0BB50 works with all SIMATIC S5 expansion units. It specifically connects the 6ES5184 series expansion chassis to the central controller. The cable supports both the S5-115U and S5-135U system families. Hence, you can expand your I/O capacity without relocating the main PLC rack.
Installation Guidelines
Connect the 6ES5705-0BB50 to the central controller’s expansion output port first. Route the cable through dedicated wireways away from AC power lines. Plug the opposite end into the expansion unit’s input connector. Do not exceed the maximum recommended bend radius during installation. Verify both connector latches click firmly into locked positions. Ground the cable shield at the central controller end only.