3TK2825-2BB40

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The Siemens 3TK2825-2BB40 is a high-quality safety relay from the renowned 3TK28 series, designed to enhance the safety of machinery and operators in industrial settings. This component operates with a 24 V dc supply and is engineered to facilitate a single channel with a configuration of 2NC/3NO contacts. Its compact dimensions of 45 x 138.5 x 120 mm allow for efficient use of space within control panels.

Crafted for reliability, the 3TK2825-2BB40 is equipped with spring-loaded terminals, ensuring secure and maintenance-free wire connections. It supports both autostart and monitored start functions, making it versatile for various safety applications. The safety relay is capable of achieving a Safety Integrity Level (SIL) of 3 and conforms to Performance Level (PL) e, according to ISO 13849-1 standards, which signifies its ability to perform at the highest levels of safety.

The device is suitable for a range of safety functions, including emergency stop circuits, protective door monitoring, and step mat monitoring, among others. It is not designed for light barrier monitoring, standstill monitoring, or valve monitoring, ensuring that it is used within its optimal application range for maximum safety and efficiency.

With its robust design, the 3TK2825-2BB40 is finger-safe, protecting users from electrical shock, and it can withstand a wide range of operating temperatures from -25 to +60 degrees Celsius. The relay's housing is rated IP20, providing a basic level of protection against solid objects.

This safety relay is an essential component for industrial automation professionals seeking a dependable solution for machine safety. Its design and certifications underscore its suitability for critical safety applications, making it a trusted choice for safeguarding both equipment and personnel.
Specification Description
Part Number 3TK2825-2BB40
Alternative Part Number 3TK28252BB40
Manufacturer Siemens
Series 3TK28
Type Safety Relay
Supply Voltage 24 V dc
Channels 1 Channel
Contact Configuration 2NC/3NO
Number of Contacts 2 Contacts
Dimensions 45 x 138.5 x 120 mm
Mounting Type Screw and snap-on mounting
Terminal Type Spring-loaded terminal
Operating Temperature Range -25 to +60 °C
Storage Temperature Range -40 to +80 °C
Insulation Voltage 300 V
Air Pressure 90 to 106 kPa
Relative Humidity 10 to 95%
Installation Altitude Up to 2,000 m above sea level
Vibration Resistance 5 to 500 Hz: 0.075 mm
Shock Resistance 8g / 10 ms
Impulse Voltage Resistance 4,000 V
EMC Emitted Interference EN 60947-5-1
Safety Integrity Level (SIL) SIL3
Performance Level (PL) PL e
Category according to EN ISO 13849-1 Category 4
Hardware Fault Tolerance According to IEC 61508: 1
Safety Device Type According to IEC 61508-2: Type A
PFHD (Probability of Dangerous Failure per Hour) 0.0000000015 1/h
PFDavg (Average Probability of Failure on Demand) 0.0000013 1/y
T1 Value for Proof Test Interval or Service Life 20 years
Number of Outputs as Contact-Affected Switching Element 2 NC for signalling function, 3 NO safety-related instantaneous
Stop Category According to DIN EN 60204-1: 0
Protection Class IP IP20
Compliance BG, SUVA, UL, CSA, EN 60204-1, EN ISO 12100, EN 954-1, IEC 61508

What is the voltage rating for this safety relay?

The safety relay is rated for a control supply voltage of 24 V dc.

Can this safety relay be used for emergency stop functions?

Yes, the safety relay is designed for use with EMERGENCY-STOP units and includes features for emergency stop function monitoring.

What type of terminals does this relay have for wire connections?

This relay is equipped with spring-loaded terminals for secure and easy wire connections.

What is the maximum operating frequency of this relay?

The maximum operating frequency of the relay is 1,000 operations per hour.

What are the dimensions of this safety relay?

The dimensions of the safety relay are 45 mm in width, 138.5 mm in height, and 120 mm in depth.

Is this relay suitable for monitoring floating sensors?

Yes, the relay is suitable for monitoring floating sensors.

What is the maximum ambient operating temperature for this relay?

The maximum ambient operating temperature for the relay is 60°C.

What is the insulation voltage rating for this device?

The insulation voltage rating for this device is 300 V.

What is the product's IP rating?

The safety relay has an IP20 rating for both the enclosure and the terminals.

How many safety contacts does this relay have?

The relay has 2 normally closed (NC) contacts for signalling functions and 3 normally open (NO) contacts for safety-related functions.

Can this relay be used for protective door monitoring?

Yes, it is suitable for protective door monitoring applications.

What is the mechanical service life of this relay?

The mechanical service life of the relay is typically 10 million operating cycles.

Does this relay support automatic start and monitored start functions?

Yes, the relay supports both automatic start and monitored start functions.

What certifications does this safety relay hold?

The relay holds certifications from BG, SUVA, UL, CSA, and complies with standards such as EN 60204-1, EN ISO 12100, EN 954-1, and IEC 61508.

  • Emergency stop circuit monitoring
  • Safety gate monitoring
  • Light curtain and safety sensor integration
  • Standstill and speed monitoring for machinery
  • Monitoring of safety mats and pressure-sensitive safety devices
  • Implementation in safety circuits for manufacturing equipment
  • Use in automated assembly lines for personnel protection
  • Integration into packaging machinery for safe operation
  • Application in material handling systems to ensure safe stop functions
  • Incorporation into robotic work cells for emergency shutdown procedures

This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.

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