Siemens 6ES5705-3CD21 S5 Cable | 3m | 15-Pin D-sub

This Siemens cable connects S5 peripheral devices to the central controller reliably. The Siemens 6ES5705-3CD21 links the CPU with remote I/O stations efficiently. Its durable construction ensures long service life in industrial environments. This cable suits both fixed installations and temporary diagnostic connections. The Siemens 6ES5705-3CD21 transmits both data and power signals effectively.

Connector Types and Physical Specifications

This cable features a 15-pin D-sub connector at both ends. Each connector includes locking screws for secure attachment. Its overall length measures exactly 3 meters for flexible routing. The outer diameter reaches 8 mm with a robust PVC jacket. This assembly weighs approximately 0.35 kilograms for easy handling. The Siemens 6ES5705-3CD21 uses 12 individually insulated conductors within the cable. Each conductor features a cross-section of 0.25 mm² for reliable transmission.

Shielding and Electrical Characteristics

A tinned copper braid shield wraps around the internal conductor bundle. This shield provides over 85% coverage for electromagnetic protection. The cable’s characteristic impedance stabilizes at 100 ohms for matched transmission. Maximum operating voltage reaches 300 V AC without insulation breakdown. Insulation resistance exceeds 50 MΩ per kilometer at room temperature. The Siemens 6ES5705-3CD21 exhibits a capacitance of roughly 70 pF per meter. Its conductor resistance stays below 120 Ω per kilometer for efficient operation.

Temperature Range and Mechanical Durability

This cable operates reliably between -25°C and 70°C in normal conditions. It withstands exposure to oils and mild chemical agents without degradation. The PVC jacket resists abrasion for long service life in cabinets. Bending radius should not fall below 8 times the cable diameter. This cable maintains performance after 2 million flexing cycles at 90 degrees.

Detailed Specification Table

Parameter	Specification
Connector Type (Both Ends)	15-pin D-sub (male)
Connector Locking	Screw type
Cable Length	3 meters
Outer Diameter	8 mm
Weight	Approx. 0.35 kg
Number of Conductors	12
Conductor Cross-Section	0.25 mm²
Shielding Coverage	>85% braided copper
Characteristic Impedance	100 Ω
Maximum Voltage	300 V AC
Insulation Resistance	>50 MΩ/km
Capacitance	70 pF/m
Conductor Resistance	<120 Ω/km
Operating Temperature	-25°C to 70°C
Minimum Bending Radius	8 x cable diameter

Application and Connection Guidelines

Use this cable for connecting S5 CPUs to IM 306 interface modules. It also links remote racks in distributed automation architectures. Route the cable away from high-power lines to prevent induced noise. Secure the cable using plastic ties every 40 centimeters along its path. The Siemens 6ES5705-3CD21 supports both power and signal transmission simultaneously. Connect the shielding at both ends for maximum interference suppression. Always power down equipment before connecting or disconnecting the cable ends. Inspect the connector pins regularly for signs of corrosion or damage.