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The Siemens 6ES5731-1CC00 Simatic S5 Serial Port Cable connects S5 CPUs to programming devices and printers. This shielded cable transfers data between the PLC and external equipment. You will find it in commissioning and maintenance applications for S5 systems. It features a 15-pin connector on one end and a 25-pin on the other. Therefore, this cable enables program uploads, downloads, and diagnostic monitoring.
The Siemens 6ES5731-1CC00 Simatic S5 Serial Port Cable measures 2500 mm in length and 30 mm in width. Its cable diameter reaches 7 mm for flexible routing. The unit weighs approximately 0.40 kilograms. It contains 15 individually shielded conductors for noise immunity. A 15-pin D-sub male connector terminates one end of the cable. Additionally, a 25-pin D-sub male connector terminates the opposite end.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Siemens AG |
| Model | 6ES5731-1CC00 |
| Product Type | Simatic S5 Serial Port Cable |
| Cable Length | 2500 mm (2.5 meters) |
| Number of Conductors | 15 |
| Conductor Gauge | 26 AWG (7-strand) |
| Shielding Type | Foil + overall braid |
| Connector End 1 | 15-pin D-sub (male) |
| Connector End 2 | 25-pin D-sub (male) |
| Protocol | TTY (20 mA current loop) |
| Cable Diameter | 7 mm |
| Width | 30 mm |
| Weight | 0.40 kg |
| Insulation Material | PVC |
| Temperature Rating | -20°C to +80°C |
| Bending Radius | 70 mm (minimum) |
Internal Architecture and Energy Storage
The Siemens 6ES5731-1CC00 Simatic S5 Serial Port Cable stores absolutely no electrical energy internally. It contains no capacitors or active components. Fifteen individually shielded twisted pairs provide excellent noise rejection. An overall copper braid surrounds all conductors for additional EMI protection. Each conductor uses 26 AWG stranded copper wire for flexibility. PVC insulation surrounds each conductor for electrical isolation. A 15-pin D-sub male connector terminates the S5 CPU end. A 25-pin D-sub male connector terminates the programming device end. The cable supports 20 mA current loop communication for reliable long-distance data transfer.
Connection Interfaces and Wiring Details
You will find a 15-pin D-sub male connector at the S5 CPU end. Connect this end to the CPU programming port. The Siemens 6ES5731-1CC00 Simatic S5 Serial Port Cable has a 25-pin D-sub male connector at the programmer end. Connect this end to your PG or PC programming adapter. The cable transfers TTY signals for S5 serial communication. Pin 15 on the 15-pin connector connects to pin 1 on the 25-pin connector for send data. Pin 2 on the 15-pin connector connects to pin 2 on the 25-pin connector for receive data. Both connectors feature thumbscrews for secure attachment. The shielding works only when you properly ground the cable through the connector shells.
Installation and Routing Steps
You power off all devices before connecting this cable. First, align the 15-pin connector with the CPU programming port. Then, tighten the thumbscrews to secure the connection. Align the 25-pin connector with the programmer port. Tighten the thumbscrews on this end as well. The Siemens 6ES5731-1CC00 Simatic S5 Serial Port Cable fits all S5 CPUs with TTY programming ports. Route the cable away from high-voltage power cables to avoid noise. Maintain a minimum separation of 100 mm from AC power lines. Do not bend the cable beyond its minimum bending radius of 70 mm. Use cable ties at intervals of 500 mm for organized management. Test communication between the programmer and CPU before online operations.