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3SK1111-1AW20
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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3SK1111-1AW20 |
| Alternative Part Number | 3SK11111AW20 |
| Manufacturer | Siemens |
| Product Series | SIRIUS 3SK |
| Product Type | Safety Relay |
| Supply Voltage | 110 to 240 V ac |
| Number of Channels | 1 Channel |
| Dimensions | 22.5 x 100 x 121.6 mm |
| Protection Class | IP20 |
| Insulation Voltage | Rated value 300 V |
| Ambient Operating Temperature | -25 to +60 °C |
| Storage Temperature | -40 to +80 °C |
| Air Pressure | 90 to 106 kPa |
| Relative Humidity | 10 to 95 % |
| Installation Altitude | Up to 2000 m above sea level |
| Vibration Resistance | 5 to 500 Hz: 0.75 mm |
| Shock Resistance | 10g / 11 ms |
| Surge Voltage Resistance | Rated value 4000 V |
| EMC | Emitted interference IEC 60947-5-1, Class A |
| Safety Integrity Level (SIL) | SIL3 according to IEC 61508 |
| Performance Level (PL) | PL e according to EN ISO 13849-1 |
| Category according to EN ISO 13849-1 | 4 |
| Safe Failure Fraction (SFF) | 99 % |
| PFHD | 0.0000000015 1/h |
| PFDavg | 0.000001 |
| T1 Value for Proof Test Interval | 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 | 3 NO contacts for safety-related instantaneous actions |
| Number of Signalling Contacts | 1 NC contact for signalling function |
| Stop Category | 0 according to DIN EN 60204-1 |
The Siemens SIRIUS 3SK Series Safety Relay, part number 3SK1111-1AW20, is a fundamental component for various industrial safety applications. Designed to meet stringent safety requirements, this relay is engineered to facilitate the safe and reliable operation of machinery and plant equipment. With a supply voltage range of 110 to 240 V ac, it is versatile for international use and compatible with a wide array of control systems.
This compact device, with dimensions of 22.5 x 100 x 121.6 mm, is suitable for space-constrained environments while offering a robust set of features. It includes three normally open (NO) safety-related contacts and one normally closed (NC) signalling contact, providing flexibility in safety circuit design. The relay is also equipped with a finger-safe enclosure, ensuring protection against electrical shock and enhancing workplace safety.
The 3SK1111-1AW20 is rated for Performance Level e and Safety Integrity Level 3, according to EN ISO 13849-1 and IEC 61508, respectively. These ratings indicate a high level of reliability in safety-related parts of control systems. Additionally, the relay boasts a Safe Failure Fraction (SFF) of 99%, indicating its ability to perform reliably over time.
Installation is straightforward, with screw-type terminals for secure and reliable connections. The relay does not require a plug-in socket, which simplifies wiring and maintenance. It is designed for use in Class A electromagnetic environments and is equipped with measures to prevent undesired radio-frequency interference in residential areas.
The Siemens SIRIUS 3SK Series Safety Relay is an essential component for those seeking to maintain high safety standards in industrial settings while ensuring compliance with international safety regulations. Its reliable performance and ease of integration make it a valuable addition to any safety system.
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Frequently Asked Questions
What is the voltage range for this safety relay?
The safety relay operates within a voltage range of 110 to 240 V AC.
Can this safety relay be used for autonomous safety applications?
Yes, the design of the product is intended for autonomous safety applications.
What is the protection class of the enclosure for this relay?
The enclosure for this relay has a protection class of IP20.
Is the relay finger-safe to protect against electrical shock?
Yes, it is designed to be finger-safe to provide protection against electrical shock.
What are the ambient temperature limits for operating this relay?
The relay can operate within an ambient temperature range of -25 to +60 degrees Celsius.
What is the maximum installation altitude for this relay?
The maximum installation altitude for the relay is 2,000 meters above sea level.
Does this relay have a vibration resistance specification?
Yes, the relay has a vibration resistance according to IEC 60068-2-6, which is 5 to 500 Hz at 0.75 mm.
What is the surge voltage resistance of this safety relay?
The surge voltage resistance rated value for this relay is 4,000 V.
What safety integrity level does this relay meet?
This safety relay meets Safety Integrity Level (SIL) 3 according to IEC 61508.
What performance level does the relay conform to?
The relay conforms to Performance Level (PL) e according to EN ISO 13849-1.
How many safety-related instantaneous contacts does the relay have?
The relay has 3 safety-related instantaneous contacts.
Can this relay be used in residential environments?
This product is suitable for Class A environments and may cause radio-frequency interference in residential environments, where appropriate measures should be taken.
