MeloAuto-Trusted PLC & DCS Parts Supplier
Technical Overview
The Siemens 6ES5734-2BF00 is a dedicated connecting cable for the SIMATIC S5 programmable logic controller series. This cable establishes a physical link between Siemens programming devices (PG 7xx series) and S5 CPUs ranging from the S5-90U to the S5-155U . The 6ES5734-2BF00 features a DB25 connector on the PG end and a DB15 connector on the PLC side, serving as a TTY (current loop) interface cable with an integrated RS-232 to TTY converter . The suffix “F00” in the model number denotes a cable length of 5 meters . This cable enables program downloads, online monitoring, diagnostics, and parameter modifications for legacy S5 systems .
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 6ES5734-2BF00 |
| Product Type | SIMATIC S5 Programming/Connecting Cable |
| Compatible PLCs | S5-90U, S5-95U, S5-100U, S5-115U, S5-155U |
| Compatible Programming Devices | PG 7xx series (e.g., PG720, PG740, PG750) |
| Connector Type (PG End) | DB25 male |
| Connector Type (PLC End) | DB15 male (PG interface on CPU) |
| Cable Length | 5 meters (F00 suffix denotes 5m) |
| Interface Standard | TTY (20mA current loop) with RS-232 to TTY conversion |
| Transfer Protocol | MPI or dedicated PG protocol |
| Data Transfer Rate | 9.6 kbps to 187.5 kbps |
| Shielding | Double shielding (aluminum foil + braided mesh) for EMI protection |
| Unit Weight | Approximately 0.253 kg (packaged) |
| Packaging Dimensions | 184 mm × 182 mm × 33 mm |
Application and Compatibility Notes
The 6ES5734-2BF00 cable provides a direct connection for programming and maintaining SIMATIC S5 controllers without requiring complex driver configurations . Users should note that this cable connects to a dedicated PG interface on the PLC, not a standard RS-232 serial port, and it incorporates a TTY converter for proper signal translation . For connecting a standard PC or laptop to an S5 PLC, additional hardware such as a Koster-Box or a PC converter cable (6ES5734-1BD20) would be necessary . This cable is now discontinued but remains valuable for supporting legacy S5-based automation systems.