Siemens Front Connector 6ES7921-5CK20-0AA0
6ES7921-5CK20-0AA0
Siemens
Siemens Front Connector 6ES7921-5CK20-0AA0
Need Siemens 6ES7921-5CK20-0AA0? Front Connector for SIMATIC S7-1500. Price & Availability It is used to connect sensors and actuators to S7-1500 digital …
Specifications
| Brand | Siemens |
|---|---|
| Model Number | 6ES7921-5CK20-0AA0 |
| Official Product Name | SIMATIC S7-1500, Front connector, 40-pin, screw-type |
| Applicable System | SIMATIC S7-1500 |
| Product Type | Front Connector |
| Equivalent Standard | IEC 61131-2 |
| Product Status | In Stock |
| Connection type | Screw-type |
| Wire cross-section (solid) | 0.25 mm² to 1.5 mm² (AWG 24 to AWG 16) |
| Wire cross-section (stranded) | 0.25 mm² to 1.5 mm² (AWG 24 to AWG 16) |
| Rated voltage | 24 V DC (typical) |
| Rated current | Up to 10 A per pin (depending on module) |
| Ambient temperature (operation) | -40 °C to +70 °C |
| Ambient temperature (storage) | -40 °C to +85 °C |
| Degree of protection | IP20 |
| Dimensions (W x H x D) | Approx. 50 mm x 100 mm x 40 mm (without cable) |
| Weight | Approx. 0.05 kg |
| Number of pins | 40 |
Product Description
It is used to connect sensors and actuators to S7-1500 digital and analog signal modules (SM) that feature 40-pin front connectors. This connector ensures reliable and secure wiring in industrial control cabinets, offering a robust mechanical design that meets the high demands of industrial environments. The connector supports wire cross-sections from 0.25 mm² to 1.5 mm² (AWG 24 to AWG 16) and is rated for a nominal voltage of 24 V DC (typical for S7-1500 signal modules). It features integrated strain relief and a locking mechanism to prevent accidental disconnection. The screw-type terminals provide a gas-tight connection, ensuring long-term stability and low contact resistance. This front connector is part of the Siemens SIMATIC S7-1500 system, which is known for its high performance, modularity, and ease of engineering. The 6ES7921-5CK20-0AA0 is a genuine Siemens spare part, ensuring full compatibility and compliance with original specifications. It is commonly used in new installations as well as for replacement or maintenance of existing S7-1500 I/O modules. The Siemens 6ES7921-5CK20-0AA0 is a SIMATIC S7-1500 front connector with 40 pins, designed for screw-type termination.
Basic Product Information
- Screw-type termination for reliable wiring
- Supports wire cross-sections from 0.25 mm² to 1.5 mm² (AWG 24 to AWG 16)
- Integrated strain relief and locking mechanism
- Rated for 24 V DC nominal voltage
- Genuine Siemens OEM part
- 40-pin front connector for S7-1500 signal modules
Technical Specifications
Version & Model Difference
The 6ES7921-5CK20-0AA0 is the current version of the 40-pin screw-type front connector for S7-1500. Earlier versions (e.g., 6ES7921-5CK00-0AA0) may have been used for older S7-300 systems, but this specific model is exclusively for S7-1500. There are also spring-type (cage clamp) versions (e.g., 6ES7921-5CK20-0AB0) that offer faster wiring without tools. The screw-type version is preferred in applications with high vibration or where maintenance is infrequent.
Application Scenarios
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