3TK2821-2CB30 SIEMENS Safety Relay

Review SIEMENS 24v Safety Relay

The Siemens 3TK2821-2CB30 24V safety relay is a versatile and reliable component designed for use in various safety applications where the reliability and performance are of the utmost importance. This safety relay, specifically, is designed to operate with a 24V DC control voltage.

The Siemens 3TK2821-2CB30 safety relay is built with a robust and compact design, which makes it an ideal choice for both new installations and replacement applications. It features a total of 16 contacts, out of which 8 are normally open (NO) contacts and the other 8 are normally closed (NC) contacts. These contacts are rated for a contact handling capacity of up to 10 amperes, making it suitable for handling relatively heavy loads.

This safety relay boasts a high contact assurance, which is essential in safety applications to ensure that the contacts always make and break responsively and reliably as intended. Its modular design offers high fault detection capability, as it can detect common faults such as coil and contact failure and can indicate an active fault via an LED indicator.

The Siemens 3TK2821-2CB30 is a Class 2 dispensing relay, meaning it is fully energized in both conditions (coil energized and coil de-energized). This makes it suitable for applications where the normally open contacts need to remain closed when the coil is not energized, such as in many safety applications. This Class 2 feature is important because, in some safety applications, a lack of power or the failure of a component could lead to catastrophic consequences. The relay's Class 2 capability ensures that the normally open contacts maintain their position duringpower failure or malfunction.

This safety relay is certified according to the latest safety standards, such as ISO 13849-1 and EN 60204-1, which specifies the performance levels and requirements for safe electrical control application. It also complies with EN 61508, which sets the functional safety requirements and evaluation criteria for electrical/electronic/programmable safety-related systems. In addition, it has been factory tested to EN 50200/IEC 61010-1 standards, ensuring that it undergoes rigorous testing to meet safety requirements and dimensions, construction, marking, and documentation specifications.

The Siemens 3TK2821-2CB30 safety relay offers various options for mounting the terminal blocks, such as DIN rails, terminal blocks in the baseplate, or terminal blocks on the contact side. It also has an optional opto-isolated input, which can separate the control circuit and the safety circuit electrically, offering further improved safety and reliability in applications where safety and galvanic isolation are essential.

In summary, the Siemens 3TK2821-2CB30 24V safety relay is a robust and reliable component designed for safety applications that demand high performance, reliability, and safety. With its modular design, tremendous fault detection capability, and compliance with the latest safety standards, this safety relay guarantees efficient and safe protection against specified hazards, ensuring the highest level of risk reduction for both people and machines.

Siemens 3tk2821-2cb30 24V safety relay is a commonly used electrical component in machinery and automation systems for safety functions. The relay ensures safe operation by disconnecting power in case of certain fault conditions or emergency stops. Here are some pros and cons of this particular safety relay:

1. Safety: This relay is designed as a safety component and adheres to recognized safety standards, ensuring the safety of equipment and personnel.

2. Robust Design: The Siemens 3tk2821-2cb30 is built to withstand harsh industrial environments and can operate reliably over a wide temperature range.

3. High Fault Tolerance: It offers fault tolerance by offering contacts for both normally open and normally closed contacts, ensuring continuity even during power outages or fault conditions.

4. Versatile: This safety relay can be used for various safety applications, and its universal design allows it to be used in different industries and applications.

5. Excellent Support and Availability: Given Siemens' established position in the automation industry, technical support and spare parts for this safety relay are widely available.

1. Cost: The Siemens 3tk2821-2cb30 safety relay may be more expensive than some other brands or models, but its safety features and robust design justify the premium.

2. Complex Wiring Diagram: The wiring diagram for this safety relay can be complex due to its multiple contacts and safety functions, requiring careful planning and installation.

3. Size and Weight: The relay is larger and heavier than some other models, adding to the installation costs and space requirements.

The Siemens 3tk2821-2cb30 24V safety relay offers robust design, high fault tolerance, safety assurance, and reliable operation. While it may have a higher cost and require a more complex wiring diagram, its benefits often outweigh the disadvantages. This relay is an excellent choice for critical safety applications in various industries and automation systems.

For applications that require a high level of safety and reliability, such as machinery and lifts, the Siemens 3tk2821-2cb30 24V safety relay is a solid investment. Its robust design, fault tolerance, and support from a trusted brand make it a recommended choice for safety systems. However, careful planning, precise installation, and the necessary budget should be considered before making the purchase.

Details:

Siemens 3tk2822-1cb30 relay. Condition is used / removed during a plant closure from nice working equipment. Item location: b rack - box 18 Jul.

specifications genpurrelays:

• brand: Siemens
• mpn: 3tk2821-2cb30
• current type: Ac/dc
• type: Safety Relay
• coil voltage: 24 V
• application: Branch Circuit

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• transit: 4-9 days
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• class: standard
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• category: Business & Industrial > Electrical Equipment Supplies > General Purpose Relays

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