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The 6ES5704-3BC50 functions as a plug-in cable for the Siemens SIMATIC S5 PLC system. This unit connects a programming unit to the CPU for program transfer and monitoring. It carries both power and communication signals between devices. Therefore, this cable enables easy field programming and diagnostics for legacy automation systems.
Technical Specifications
We engineered this plug-in cable for reliable communication in industrial environments. Its shielded construction minimizes electromagnetic interference from nearby equipment. Moreover, the cable includes keyed connectors for foolproof installation.
| Parameter | Specification |
|---|---|
| Length | 5.0 meters (16.4 feet) |
| Cable Diameter | 6.5 mm (0.26 inches) |
| Weight | 0.32 kg (0.7 lbs) |
| Connector Type (End A) | 15-pin D-sub male |
| Connector Type (End B) | 15-pin D-sub male |
| Number of Conductors | 15 shielded wires |
| Shielding | Braided copper shield with drain wire |
| Jacket Material | PVC (Polyvinyl Chloride) |
| Bend Radius (Min) | 65 mm (2.6 inches) |
| Voltage Rating | 30V DC maximum |
| Current Rating | 1.0 A per conductor |
| Operating Temperature | -20°C to +70°C (-4°F to 158°F) |
Cable Construction and Shielding
The 6ES5704-3BC50 uses a braided copper shield to protect signal integrity. This shield covers all 15 conductors inside the cable assembly. A drain wire simplifies shield termination at both connector ends. Consequently, this construction rejects electrical noise from nearby AC power lines and motor cables.
Connector Design and Locking
This plug-in cable features 15-pin D-sub connectors on both ends. Each connector includes thumbscrews for secure mechanical locking. The screws tighten by hand for tool-free installation. Therefore, the cable will not vibrate loose in high-shock industrial environments.
Signal and Power Distribution
The 6ES5704-3BC50 carries both data signals and DC power simultaneously. Six conductors transmit programming and monitoring data between devices. Nine conductors distribute 24V DC power to the programming unit. Thus, a single cable provides complete connectivity without separate power wiring.
Mechanical Flexibility and Routing
This plug-in cable bends around corners with a minimum 65 mm radius. Its flexible PVC jacket withstands repeated coiling and uncoiling during maintenance. The cable lies flat on the floor for temporary field connections. Use cable ties every 400 mm to secure the cable along permanent installations.
Compatibility and Applications
The 6ES5704-3BC50 works with all SIMATIC S5 programming units. It also connects to PG 675, PG 685, and PG 710 laptops with S5 adapters. The cable supports both online monitoring and program download operations. Hence, maintenance technicians can diagnose faults without removing the CPU from the rack.
Installation Guidelines
Connect the 6ES5704-3BC50 to the CPU’s programming port securely. Tighten both thumbscrews by hand until they stop turning. Route the cable away from AC power lines and variable frequency drives. Connect the opposite end to your programming unit’s S5 port. Do not exceed the maximum recommended bend radius during installation. Verify both connectors latch firmly before powering on the system.