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The 6ES5712-8BC50 functions as a cable connector for the Siemens SIMATIC S5 PLC system. This device connects field wiring to the I/O modules on the expansion rack. It provides secure termination for up to 20 individual signal wires. Therefore, this connector enables reliable field device connections for industrial automation applications.
Technical Specifications
We engineered this cable connector for rugged industrial environments. Its screw-type termination eliminates the need for special crimping tools. Moreover, the connector includes strain relief to prevent wire pull-out from vibration.
| Parameter | Specification |
|---|---|
| Dimensions (W x H x D) | 2.4 x 1.6 x 2.2 inches (61 x 41 x 56 mm) |
| Weight | 0.06 kg (0.13 lbs) |
| Number of Pins | 20 pins (2 rows of 10) |
| Current Rating | 2.5 A per pin |
| Voltage Rating | 125V AC / 30V DC |
| Contact Resistance | < 20 mΩ |
| Insulation Resistance | > 1000 MΩ |
| Termination Type | Screw terminals (captive screws) |
| Wire Size | 24-16 AWG (0.2-1.5 mm²) |
| Strain Relief | Integrated clamp for cable jacket |
| Housing Material | Polyamide (UL94-V0) |
| Operating Temperature | -25°C to +85°C (-13°F to 185°F) |
Mechanical Design and Construction
The 6ES5712-8BC50 features a rugged polyamide housing for impact resistance. Two rows of screw terminals accept field wiring from external devices. The connector mates with the 20-pin header on S5 I/O modules. A metal latch secures the connector to the module housing positively.
Termination Method and Wiring
This cable connector uses screw-type terminals for each of the 20 pins. Insert the stripped wire into the terminal opening and tighten the screw. The captive screw remains attached to the connector, never falling out. Consequently, you can wire the connector without losing small hardware pieces.
Strain Relief and Cable Retention
The 6ES5712-8BC50 includes an integrated strain relief clamp for the cable jacket. This clamp prevents wire pull-out from the screw terminals during movement. Route the cable through the clamp opening before terminating individual wires. Tighten the clamp screws to secure the cable in place permanently. Therefore, vibration will not loosen the internal wire connections.
Contact Performance and Reliability
This cable connector uses tin-plated brass contacts for excellent conductivity. The contacts mate with module pins using a gas-tight connection. Each contact withstands more than 100 mating cycles without degradation. Hence, you can disconnect and reconnect the connector repeatedly for maintenance.
Coding and Keying Features
The 6ES5712-8BC50 includes a mechanical coding feature on the housing. You can insert coding pins into the connector body to prevent mismating. This feature ensures you cannot plug the connector into the wrong module. Thus, maintenance personnel avoid accidental cross-connection of field wiring.
Energy Storage and Electrical Safety
This cable connector contains no battery or capacitor energy storage components. It operates as a purely passive interconnect device in the system. The connector provides basic insulation between adjacent pins for safety. Always disconnect power before removing or inserting this connector.
Installation and Wiring Guidance
Prepare the cable by stripping the outer jacket back 40 mm. Secure the cable under the strain relief clamp before terminating wires. Strip each conductor to 6 mm for proper screw terminal insertion. Insert the wire fully into the terminal opening before tightening the screw. Tighten each screw to 0.5 Nm of torque for reliable contact. Label the connector with the module address for future maintenance reference.