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Specification & Description
| 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 |
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.
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Frequently Asked Questions
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.
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