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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3SK1211-1BB40 |
| Alternative Part Number | 3SK12111BB40 |
| Manufacturer | Siemens |
| Product Category | Safety Relays |
| Product Designation | Output Expansion |
| Supply Voltage | 24 V DC |
| Connection Type | Screw Terminal |
| Dimensions | 22.5 x 121.6 x 100 mm |
| Protection Class | IP20 |
| Insulation Voltage | Rated at 300 V |
| Ambient Operating Temperature | -25 to +60 °C |
| Storage Temperature | -40 to +80 °C |
| Installation Altitude | Up to 2000 m above sea level |
| Vibration Resistance | According to IEC 60068-2-6, 5 to 500 Hz: 0.75 mm |
| Shock Resistance | 10g / 11 ms |
| Surge Voltage Resistance | Rated at 4000 V |
| EMC Emitted Interference | Compliant with IEC 60947-5-1, IEC 61000 |
| Safety Integrity Level (SIL) | SIL3 according to IEC 61508 |
| Performance Level (PL) | PL e according to EN ISO 13849-1 |
| Category | Category 4 according to EN ISO 13849-1 |
| PFHD | 0.0000000017 1/h |
| PFDavg | 0.000001 |
| T1 Value | 20 years |
| Hardware Fault Tolerance | According to IEC 61508: 1 |
| Safety Device Type | Type A according to IEC 61508-2 |
| Number of Safety-related Contacts | 4 NO (Normally Open) contacts for safety-related applications |
| Number of Signalling Contacts | 1 NC (Normally Closed) contact for signalling function |
| Operating Frequency | Maximum 360 operations/hour |
| Switching Capacity of NO Contacts | At DC-13: 5 A at 24 V, 0.2 A at 115 V, 0.1 A at 230 V; At AC-15: 5 A at 24/115/230 V |
The Siemens 3SK1211 Series Safety Relay is a vital component designed to ensure the safety and reliability of industrial automation systems. This safety relay operates with a 24 V dc supply and is engineered for screw mounting, making it a versatile choice for various applications. Its compact dimensions of 22.5 x 121.6 x 100 mm allow for efficient use of space within control panels.
Crafted to meet stringent safety standards, the 3SK1211 Series boasts an impressive array of features, including a Performance Level (PL) of 'e' according to EN ISO 13849-1 and a Safety Integrity Level (SIL) of SIL3 as per IEC 61508, indicating its capability to handle high-risk safety functions. The relay is equipped with four safety-related instantaneous NO (Normally Open) contacts, and one NC (Normally Closed) contact for signaling functions, providing flexibility in safety circuit design.
The robust design of the Siemens safety relay ensures reliable operation in a wide range of environmental conditions, with an operating temperature range of -25 to +60°C and resistance to vibrations and shocks. Its finger-safe terminals offer additional protection against electrical shock, enhancing safety during installation and maintenance.
This safety relay is an essential component for machine builders and system integrators seeking to implement or upgrade safety measures in their equipment. Its adherence to international safety standards makes it a trustworthy choice for safeguarding personnel and machinery in a variety of industrial settings.
Commonly Asked Questions
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Frequently Asked Questions
What type of device is this safety relay suitable for?
The Siemens safety relay is suitable for Class B environments and can also be used in domestic environments, providing flexibility for a variety of industrial and residential applications.
What is the rated insulation voltage for this safety relay?
The rated insulation voltage for this safety relay is 300 V, ensuring it can handle the necessary power levels for safe operation.
Can this safety relay be used in areas with high levels of vibration?
Yes, this safety relay is designed with vibration resistance according to IEC 60068-2-6 standards, which means it can withstand 5 to 500 Hz at 0.75 mm.
What is the maximum operating altitude for this safety relay?
The maximum operating altitude for the safety relay is 2,000 meters above sea level, allowing it to function effectively in various installation environments.
What are the ambient temperature limits for operating this safety relay?
The safety relay can operate within an ambient temperature range of -25 to +60 °C, making it suitable for a wide range of environmental conditions.
What is the significance of the Performance Level 'e' for this safety relay?
The Performance Level 'e' indicates that the safety relay meets the highest level of safety performance as per EN ISO 13849-1 standards, which is essential for applications requiring reliable safety functions.
What is the Safety Integrity Level (SIL) rating for this safety relay?
This safety relay has a SIL3 rating according to IEC 61508, which signifies a high level of reliability and safety for critical control systems.
How many safety-related instantaneous contacts does this relay have?
The safety relay is equipped with four safety-related instantaneous contacts, providing multiple options for integrating into safety circuits.
What is the maximum switching capacity for the NO contacts of the relay outputs at 24 V?
At 24 V, the maximum switching capacity for the Normally Open (NO) contacts of the relay outputs is 5 A.
Is this safety relay finger-safe?
Yes, the safety relay is designed with finger-safe protection, minimising the risk of electrical shock during handling and operation.
