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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3TK2825-1AB20 |
| Alternative Part Number | 3TK28251AB20 |
| Manufacturer | Siemens |
| Series | 3TK2 |
| Type | Safety Relay |
| Supply Voltage | 24 V AC |
| Terminal Type | Screw Terminal |
| Dimensions | 45 x 115 x 106 mm |
| Contact Configuration | 2NC/3NO |
| Operating Temperature Range | -25 to +60 °C |
| Storage Temperature Range | -40 to +80 °C |
| Installation Altitude | Up to 2000 m above sea level |
| Insulation Voltage | Rated at 300 V |
| Frequency | 50/60 Hz |
| Control Supply Voltage Range | 0.85 to 1.1 times the rated value |
| Mounting Type | Screw and snap-on mounting |
| Enclosure Protection | IP20 |
| Electrical Endurance | Typically 100,000 operating cycles |
| Mechanical Service Life | Typically 10 million operating cycles |
| Safety Integrity Level (SIL) | Achievable up to SIL3 |
| Performance Level (PL) | Up to PL e |
| Category | According to ISO 13849-1: Category 4 |
| Shock Resistance | 8g / 10 ms |
| Vibration Resistance | 5 to 500 Hz: 0.075 mm |
| Relative Humidity | 10 to 95% during operation |
| Air Pressure | 90 to 106 kPa according to SN 31205 |
| Impulse Voltage Resistance | Rated at 4000 V |
| EMC Emitted Interference | Complies with EN 60947-5-1 |
| Safety Features | Supports single-channel and two-channel safety-related wiring, cross-circuit-proof |
| Approvals | BG, SUVA, UL, CSA, EN 60204-1, EN ISO 12100, EN 954-1, IEC 61508 |
| Special Functions | Automatic start, monitored start-up, emergency stop function, pressure-sensitive mat monitoring |
| Suitable Applications | For EMERGENCY-STOP units, safety switch, position switch monitoring, safety-related circuits |
The Siemens 3TK2825-1AB20 is a high-quality safety relay from the renowned SIRIUS range, designed to ensure the safe operation of emergency stop units and other safety devices. This component is engineered to provide reliable service in a variety of industrial settings, offering a robust solution for safety-related applications.
With a compact design measuring 45 x 115 x 106 mm, this safety relay is suitable for space-constrained environments while still delivering the performance needed for critical operations. It operates with a control supply voltage of 24 V AC and features a screw terminal connection for secure and straightforward installation.
The 3TK2825-1AB20 boasts an impressive array of technical specifications, including 2NC/3NO contact configuration, which allows for both immediate and delayed relay actions. This flexibility ensures that it can be integrated into a wide range of safety circuits, providing the necessary redundancy and reliability required for high-level safety performance.
This safety relay is capable of achieving a Safety Integrity Level (SIL) of 3 and a Performance Level (PL) of e, according to IEC 61508 and ISO 13849-1 standards, respectively. These ratings indicate that the relay is suitable for use in systems that require a high degree of reliability and safety.
The unit is designed with finger-safe protection and an IP20 rating for the housing and terminals, ensuring that it can be safely handled and operated by technicians. Additionally, the relay is resistant to vibrations and shocks, making it a durable choice for industrial environments where machinery operates under demanding conditions.
The Siemens 3TK2825-1AB20 is a testament to Siemens' commitment to safety and reliability in automation and control systems. It is an essential component for any operation where safety is paramount, providing peace of mind through its dependable performance and compliance with stringent safety standards.
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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 AC.
Can this safety relay be used for emergency stop functions?
Yes, the safety relay is designed for use with EMERGENCY-STOP units and can be used for emergency stop functions.
What type of terminals does this safety relay have for wiring?
This safety relay is equipped with screw-type terminals for secure and reliable wiring connections.
What is the maximum operating frequency of this relay?
The maximum operating frequency of the relay is 1,000 operations per hour.
What is the IP rating of this safety relay?
The safety relay has an IP20 rating for both the housing and the terminals, indicating protection against solid objects larger than 12.5 mm but not against liquids.
What are the dimensions of this safety relay?
The dimensions of the safety relay are 45 x 115 x 106 mm.
How many safety contacts does this relay have?
The relay has 2 normally closed (NC) contacts for reporting functions and 3 normally open (NO) contacts for safety-related applications.
What is the maximum installation altitude for this relay?
The maximum installation altitude for the relay is 2,000 meters above sea level.
What certifications does this safety relay hold?
The safety relay holds certifications from TÜV, UL, and CSA, among others, indicating compliance with various safety and quality standards.
What is the thermal current rating for the switching element of this relay?
The thermal current rating for the switching element of the relay is 6 A.
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