Siemens 6ES7921-3AA20-0AA0

Siemens 6ES7921-3AA20-0AA0

The Siemens 6ES7921-3AA20-0AA0 stands as a front connector module meticulously designed for seamless integration with the SIMATIC S7-300 target system. This fully modular connection module plays a pivotal role in facilitating the connection of digital I/O modules through a flat ribbon cable, offering a reliable solution for managing digital signals in industrial automation systems.

Operating Data and Header

Operating Voltage and Current:

Operating within a rated voltage of 24 V, with a maximum voltage of 60 V, the module ensures a robust power supply over spring terminals. With a rated current of 1 A and a continuous current of 1 A per plug-in contact (maximum 4 A overall), it provides a reliable electrical foundation.

Temperature Resilience:

Operating seamlessly within a temperature range of 0 to 60 °C, the module adapts to varying environmental conditions. It further demonstrates its versatility by being suitable for storage in temperatures ranging from -40 to +70 °C.

Connection Specifications:

The front connector module features 40 poles, providing a comprehensive interface for digital I/O modules. With 16 poles at the 1st interface using an IDC connector for the connection cable, the module supports a variety of connections. The plug-in connection for the connecting cable and a spring clamp for the power supply contributes to its adaptability.

Cable Connection and Flexibility

The module accommodates 8 terminals, with 4 each for L+ and M connections. It supports up to 2 cables per connection, offering flexibility in system configuration. The stripped length for cables is 6 mm, allowing for efficient and secure connections.

Environmental Adaptability

Operating seamlessly within an ambient temperature range of 0 to 60 °C during operation and storage, the module is well-suited for demanding industrial environments. With a wire length support of up to 30 meters between the front connector module and the terminal module, it provides flexibility in system design and layout.

General Data and Certification

Design and Mounting

Designed for direct mounting, the module adheres to degree 2 of pollution and overvoltage category 2 standards. Although it lacks a designation for EEx e type of protection, it holds cULus approval, affirming its compliance with stringent safety standards.

Material and Aesthetics

Constructed with an insulating body made of other materials and featuring a black enclosure, the 6ES7921-3AA20-0AA0 combines functionality with a sleek and professional aesthetic. While not transparent, its robust construction ensures reliability in demanding industrial applications.

Siemens 6ES7921-3AA20-0AA0

Q1: What is the primary function of the Siemens 6ES7921-3AA20-0AA0?

A1: The 6ES7921-3AA20-0AA0 serves as a front connector module specifically designed for the SIMATIC S7-300 target system. Its primary function is to facilitate the connection of digital I/O modules through a flat ribbon cable, providing a reliable solution for managing digital signals in industrial automation systems.

Q2: What is the operating voltage range of the module?

A2: The module operates within a rated voltage of 24 V, with a maximum voltage of 60 V.

Q3: How does the module handle temperature variations?

A3: The module demonstrates resilience to temperature variations, operating within a range of 0 to 60 °C during normal operation and being suitable for storage in temperatures ranging from -40 to +70 °C.

Q4: What is the connection specification of the front connector module?

A4: The module features 40 poles, providing a comprehensive interface for digital I/O modules. It supports 16 poles at the 1st interface using an IDC connector for the connection cable. The module employs a plug-in connection for the connecting cable and a spring clamp for the power supply.

Q5: How flexible is the module in terms of cable connections?

A5: The module accommodates 8 terminals, with 4 each for L+ and M connections. It supports up to 2 cables per connection, offering flexibility in system configuration. The stripped length for cables is 6 mm.

Q6: Does the module have any environmental adaptability features?

A6: Yes, the module operates seamlessly within an ambient temperature range of 0 to 60 °C during operation and storage. It supports a wire length of up to 30 meters between the front connector module and the terminal module, providing flexibility in system design and layout.

Q7: What certifications does the module hold?

A7: The module, while lacking a designation for EEx e type of protection, holds cULus approval, affirming its compliance with stringent safety standards.

Q8: What material is used for the insulating body of the module?

A8: The insulating body of the module is constructed using other materials.

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