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Technical Overview
The Siemens 6ES5731-0BD20 is a programming cable for the SIMATIC S5 programmable logic controller family. This cable connects standard personal computers to S5 CPUs for program transfer and diagnostics. It features a 9-pin D-sub connector on the PC side and a 15-pin D-sub connector on the PLC side. The 6ES5731-0BD20 provides a direct RS-232 to TTY interface conversion for seamless communication. This cable enables engineers to use standard laptops for S5 programming and maintenance tasks.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 6ES5731-0BD20 |
| Product Type | SIMATIC S5 Programming Cable |
| Compatible Systems | SIMATIC S5 (S5-90U, S5-95U, S5-100U, S5-115U, etc.) |
| Connector Type (PC End) | 9-pin D-sub female (RS-232) |
| Connector Type (PLC End) | 15-pin D-sub male (TTY/PG interface) |
| Cable Length | 2.5 meters |
| Interface Standard | RS-232 to TTY with active converter |
| Data Transfer Rate | 9.6 kbps to 187.5 kbps |
| Power Supply | Derives power from RS-232 signals |
| Operating Temperature | 0°C to 60°C |
| Weight | Approximately 0.25 kg |
Application and Compatibility Notes
The 6ES5731-0BD20 provides a direct connection between standard PCs and SIMATIC S5 controllers. The integrated RS-232 to TTY converter handles all signal level translation, eliminating the need for additional hardware. Users can connect this cable to any PC with a standard serial port running S5 programming software. This cable supports all programming activities including upload, download, online monitoring, and diagnostic functions. The robust construction ensures reliable connections in industrial environments. Please note that this cable is discontinued but remains essential for maintaining legacy S5 systems still in operation.