SIRIUS 3SK safety relays are the key elements of a consistent, cost-effective safety sequence. Whether you need EMERGENCY-STOP functionality, protective door monitoring, light arrays, laser scanners or the protection of presses or punches – slimline SIRIUS safety relays enable all safety applications to be implemented in the best possible way in terms of engineering and price.
The following safety-related functions are available:
SIRIUS 3SK safety relays are approved for applications up to SIL 3 (IEC 61508/IEC 62061) or PL e (EN ISO 13849-1).
SIRIUS 3SK safety relays stand out on account of their flexibility in both parameterization and system configurations with several evaluation units. This reduces device variance, thus bringing advantages in terms of device selection and spare parts management. Optimized solutions when selecting components and reduced spare part inventory requirements are facilitated by a clearly structured component range.
SIRIUS 3SK device series
The following device series are available:
3SK1 Standard basic units
The 3SK1 Standard basic units are characterized by the following features:
3SK1 Advanced basic units
The 3SK1 Advanced basic units additionally offer:
3SK2 basic units
In addition, 3SK2 basic units offer:
The 3SK1 and 3SK2 Standard and Advanced series are a high-quality replacement for the 3TK28 safety relays. In their narrower design, and equipped with greater functionality, they can replace every 3TK28 device. The only exceptions to this are 3TK2810 devices.
Type |
3SK1 Standard basic units |
3SK1 Advanced basic units |
3SK2 basic units |
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22.5 mm |
45 mm |
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Safe |
Safe semiconductor outputs |
Safe |
Safe semiconductor outputs |
Safe semiconductor outputs |
Safe semiconductor outputs |
|
Sensors |
||||||
|
✓ |
✓ |
✓ |
✓ |
✓ |
✓ |
|
✓1) |
✓ |
✓ |
✓ |
✓ |
✓ |
|
— |
— |
✓ |
✓ |
✓ |
✓ |
|
— |
✓ By means of cascading |
✓ |
✓ |
— |
— |
Inputs |
||||||
2 x single-channel, |
2 x single-channel, |
2 x single-channel, |
2 x single-channel, |
Freely parameterizable: 10 x single-channel, |
Freely parameterizable: 20 x single-channel, |
|
Parameter |
||||||
|
✓ |
✓ |
✓ |
✓ |
A variety of functions can be set for each input/output by means of software parameterization. |
|
|
✓ Using wiring |
✓ |
✓ |
✓ |
||
|
✓ Using wiring |
✓ |
✓ |
✓ |
||
|
— |
✓ |
✓ |
✓ |
||
|
— |
— |
✓ |
✓ |
||
|
— |
— |
✓ |
✓ |
||
Safe outputs |
||||||
|
✓ |
✓ |
✓ |
✓ |
Parameterizable |
Parameterizable |
|
— |
— |
✓ |
✓ |
Parameterizable |
Parameterizable |
|
✓ Using wiring |
✓ Using wiring |
✓ |
✓ |
✓ |
✓ |
|
— |
— |
— |
— |
✓4) |
✓5) |
|
— |
— |
✓ |
✓ |
✓ |
✓ |
Options |
||||||
|
— |
— |
— |
— |
— |
✓ |
|
— |
— |
— |
— |
— |
✓ |
|
— |
— |
— |
— |
✓ |
✓ |
Control supply voltage |
||||||
|
✓2) |
✓ |
✓ |
✓ |
✓ |
✓ |
|
✓ |
✓6) |
✓3) |
✓3) |
— |
— |
✓ Available
— Not available
1) 24 V basic units only.
2) 24 V AC/DC.
3) Possible using 3SK1230 power supply via device connector.
4) Up to four independent safe outputs, two of which via device connector.
5) Up to six independent safe outputs, two of which via device connector.
6) Possible using 3SK1230 power supply by means of wiring.
3SK112 and 3SK1112 with DIP switch
The 3SK112 and 3SK1112 safety relays are configurable safety relays. They are used as evaluation units for typical safety sequences (detect, evaluate, respond). A number of functions can be set using the DIP switches on the front. Thus the 3SK112 and 3SK1112 can be used universally.
DIP switch No. |
OFF |
ON |
Schematic |
---|---|---|---|
1 |
Autostart sensor input |
Monitored start sensor input |
|
2 |
Without cross-circuit detection |
With cross-circuit detection |
|
3 |
2 x single-channel sensor connection |
1 x two-channel sensor connection |
|
4 |
With start test |
Without start test |
3SK2 with software
3SK2 safety relays are configured using the SIRIUS Safety ES software. This means that the response of a 3SK2 unit, as well as the function of the individual safe outputs, can be parameterized easily and conveniently in the logic diagram.
In addition, the configuration can be printed out for documentation purposes. The software also supports the user during commissioning and troubleshooting by means of online diagnostics and the option of being able to “force” signals in the logic plan. Through this, 3SK2 safety relays are able to offer maximum flexibility and universal application options.
Note:
SIRIUS Safety ES, see Parameterization, Configuration and Visualization.
3SK2112, |
3SK2122, |
|
PROFINET |
✓ |
✓ |
PROFIBUS |
✓ |
✓ |
✓ Possible
Innovative enclosure concept for SIRIUS 3SK safety relays
System configuration example
In the case of 3SK1 Advanced basic units or 3SK2 basic units, the 3ZY12 device connectors allow safety functions involving several sensors and actuators to be constructed very quickly.
Problem-free integration of functional safety into the main circuit through the simple combination of 3RM1 and 3SK1 devices
Functional safety in the main circuit needs to be both simple and flexible
The unique compatibility of hybrid 3RM1 fail-safe motor starters and 3SK safety relays means that integrated functional safety right through to the main circuit is no longer a problem.
Their compact design allows the motor starters to be installed to the right of the safety relay in a simple manner, just like an output expansion. The wiring of the safety-related signals to the relay can be performed simply, quickly and in an error-free manner using the device connector.
The ergonomically designed enclosure with removable terminals and terminal labeling in the hinged cover allows for the cables to be conveniently diagonally mounted from the front. Either screw-type or spring-loaded terminals with push-in technology are available.
Highlights
Note:
SIRIUS 3RM1 motor starters, see Load Feeders and Motor Starters.
Product versions |
Article number |
||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
3SK1 safety relays |
3SK1 |
❒ |
❒ |
❒ |
– |
❒ |
❒ |
❒ |
❒ |
❒ |
|
Device version |
Basic unit |
1 |
|||||||||
Expansion unit |
2 |
||||||||||
Device variants |
3SK11: Standard; 3SK12: Output expansion |
1 |
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3SK11: Advanced; 3SK12; input expansion |
2 |
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Type of outputs |
Relay outputs |
1 |
|||||||||
Semiconductor outputs |
2 |
||||||||||
Power outputs |
3 |
||||||||||
Connection type |
Screw terminal |
1 |
|||||||||
Spring-loaded terminals (push-in) |
2 |
||||||||||
Control circuit/actuation |
3SK11: 3 enabling circuits |
A |
|||||||||
3SK11: 2 enabling circuits |
B |
||||||||||
3SK11: 4 enabling circuits |
C |
||||||||||
Type of control supply voltage |
3SK1213: 24 V AC, 50/60 Hz |
B |
0 |
||||||||
3SK1: 24 V AC/DC, 50/60 Hz |
B |
3 |
|||||||||
3SK1: 24 V DC |
B |
4 |
|||||||||
3SK1213: 115 V AC, 50/60 Hz |
J |
2 |
|||||||||
3SK1213: 230 V AC, 50/60 Hz |
L |
2 |
|||||||||
3SK1: 110 … 240 AC/DC; 50/60 Hz |
W |
2 |
|||||||||
Time delay |
None |
0 |
|||||||||
0.05 … 3 s |
1 |
||||||||||
0.5 … 30 s |
2 |
||||||||||
5 … 300 s |
4 |
||||||||||
Example |
3SK1 |
1 |
1 |
1 |
– |
1 |
A |
B |
3 |
0 |
Product versions |
Article number |
||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
3SK2 safety relays |
3SK2 |
1 |
❒ |
2 |
– |
❒ |
A |
A |
1 |
0 |
|
Device variants |
10 F-DI, 2 F-DQ, width 22.5 mm |
1 |
|||||||||
20 F-DI, 4 F-DQ, width 45 mm |
2 |
||||||||||
Connection type |
Screw terminal |
1 |
|||||||||
Spring-loaded terminals (push-in) |
2 |
||||||||||
Example |
3SK2 |
1 |
1 |
2 |
– |
1 |
A |
A |
1 |
0 |
Product versions |
Article number |
||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Interface modules |
3SK2 |
5 |
1 |
1 |
– |
❒ |
F |
A |
1 |
0 |
|
Connection type |
Screw terminal |
1 |
|||||||||
Spring-loaded terminal |
2 |
||||||||||
Example |
3SK2 |
5 |
1 |
1 |
– |
1 |
F |
A |
1 |
0 |
Note:
The article number schemes show an overview of product versions for better understanding of the logic behind the article numbers.
For your order, please use the article numbers specified in the selection and ordering data.
SIRIUS 3SK safety relays are ideal for combining with SIRIUS 3RM1 motor starters.
Combinations are made by means of SIRIUS 3ZY12 device connectors (in combination with 3SK1 Advanced/3SK2) or conventional wiring (for all 3SK1 und 3SK2 basic units).
This makes collective shutdown very easy in assemblies. The wiring, and ultimately the shutting down of the control supply voltage for the expansion components in EMERGENCY-STOP situations, is performed via the device connector. There is no further need for complex looping of the connecting cables between the safety relay and the motor starters.
The 3RM1 motor starter combines the benefits of semiconductor technology and relay technology. This combination is also known as hybrid technology.
The hybrid technology in the motor starter is characterized by the following features:
Note:
SIRIUS 3RM1 motor starters, see Load Feeders and Motor Starters.
Using 3ZY12 device connectors to combine devices reduces the time required to configure and wire the components. At the same time errors are avoided during wiring, and this considerably reduces the testing required for the fully-assembled application.
Variable setting options by means of DIP switches or software, a wide voltage range (3SK1111) and a special power supply unit (3SK1 only) reduce the cost of spare parts storage and simplify the considerations during configuration with regard to the evaluation units to be selected.
The 3SK2 safety relays can be easily integrated in the overall application via PROFINET or PROFIBUS using optionally available interface modules.
This provides the following advantages:
The SIRIUS Sim simulation tool for 3SK2 can be used to quickly and easily test configurations that have been created without real devices. The configurations thus created can then be loaded directly into the real devices. Time and costs for engineering are thus reduced.
Note:
SIRIUS Sim 3SK2, see 3SK2 basic units or https://support.industry.siemens.com/cs/ww/en/view/109763750.
SIRIUS 3SK1 safety relays are used mainly in autonomous safety applications which are not connected to a safety-related bus system. Their function here is to evaluate the sensors and the safety-related shutdown of hazards. They also check and monitor the sensors, actuators and safety-oriented functions of the safety relay.
SIRIUS 3SK2 safety relays are used primarily in autonomous, more complex safety applications for which the functional scope of the 3SK1 devices is no longer sufficient, such as in the implementation of independent shutdown functions or integration into higher-level control systems for diagnostics via fieldbus. Their function here is to evaluate the sensors and the safety-related shutdown of hazards. They also check and monitor the sensors, actuators and safety-oriented functions of the safety relay.
Article number |
|
3SK1111-.AB30 3SK1211-.BB00 3SK1211-.BB40 |
3SK1111-.AW20 |
3SK1112 |
3SK1120 |
3SK1122 |
3SK1213 |
3SK1220 |
|
---|---|---|---|---|---|---|---|---|---|
Width x Height x Depth |
|
22.5 × 100 × 121.6 |
22.5 × 100 × 91.6 |
17.5 × 100 × 121.6 |
22.5 × 100 × 121.6 |
90 × 100 × 121.6 |
17.5 × 100 × 121.6 |
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General technical data: |
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Ambient temperature |
|
|
|
|
|
|
|
|
|
|
°C |
-25 … +60 |
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°C |
-40 … +80 |
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Installation altitude at height above sea level maximum |
m |
2 000 |
|||||||
Air pressure acc. to SN 31205 |
kPa |
90 … 106 |
|||||||
Shock resistance |
|
10g / 11 ms |
5 g / 10 ms |
10g / 11 ms |
|||||
Vibration resistance acc. to IEC 60068-2-6 |
|
5 … 500 Hz: 0.75 mm |
|||||||
Protection class IP of the enclosure |
|
IP20 |
|||||||
Protection against electrical shock |
|
finger-safe |
|||||||
Insulation voltage rated value |
V |
300 |
50 |
300 |
50 |
||||
Surge voltage resistance rated value |
V |
4 000 |
800 |
4 000 |
800 |
||||
Safety Integrity Level (SIL) acc. to IEC 61508 |
|
3 |
|||||||
Performance level (PL) acc. to EN ISO 13849-1 |
|
e |
|||||||
T1 value for proof test interval or service life acc. to IEC 61508 |
y |
20 |
|||||||
EMC emitted interference |
|
IEC 60947-5-1, IEC 61000 |
IEC 60947-5-1, Class A |
IEC 60947-5-1, IEC 61000 |
IEC 60947-5-1, Class A |
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Certificate of suitability |
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|
|
|
|
|
|
|
|
|
|
Yes |
|||||||
|
|
Yes |
Article number |
|
3SK1111 |
3SK1112 |
3SK1120 |
3SK1121.CB4. |
3SK1213 |
|
---|---|---|---|---|---|---|---|
Switching capacity current of the NO contacts of the relay outputs |
|
|
|
|
|
|
|
|
A |
5 |
— |
3 |
10 |
||
|
A |
5 |
— |
3 |
6 |
||
Switching capacity current of semiconductor outputs at DC-13 at 24 V |
A |
— |
2 |
0.5 |
— |
— |
Article number |
|
3SK1111-.AB30 |
3SK1111-.AW20 |
3SK1112 |
3SK1120 |
3SK1121-.AB40 |
3SK1121-.CB4. |
3SK1122-.CB4. |
3SK1213 |
|
---|---|---|---|---|---|---|---|---|---|---|
PFHD with high demand rate acc. to EN 62061 |
1/h |
0.0000000017 |
0.0000000015 |
0.000000001 |
0.0000000013 |
0.0000000025 |
0.0000000037 |
0.0000000015 |
0.000000001 |
|
PFDavg with low demand rate acc. to IEC 61508 |
|
0.000001 |
0.000007 |
0.000001 |
Article number |
|
3SK2112-.AA10 |
3SK2122-.AA10 |
|
---|---|---|---|---|
Width x Height x Depth |
|
22.5 × 100 × 124.5 |
45 × 100 × 124.5 |
|
General technical data: |
|
|
|
|
Ambient temperature |
|
|
|
|
|
°C |
-25 … +60 |
||
|
°C |
-40 … +80 |
||
Installation altitude at height above sea level maximum |
m |
2 000 |
||
Air pressure acc. to SN 31205 |
kPa |
90 … 106 |
||
Shock resistance |
|
15g / 11 ms |
||
Vibration resistance acc. to IEC 60068-2-6 |
|
5 … 500 Hz: 0.75 mm |
||
Protection class IP of the enclosure |
|
IP20 |
||
Protection against electrical shock |
|
finger-safe |
||
Insulation voltage rated value |
V |
50 |
||
Surge voltage resistance rated value |
V |
800 |
||
Safety Integrity Level (SIL) acc. to IEC 61508 |
|
3 |
||
Performance level (PL) acc. to EN ISO 13849-1 |
|
e |
||
T1 value for proof test interval or service life acc. to IEC 61508 |
y |
20 |
||
EMC emitted interference acc. to IEC 60947-1 |
|
class A |
||
Certificate of suitability |
|
|
|
|
|
|
Yes |
||
|
|
Yes |
||
Switching capacity current of semiconductor outputs at DC-13 at 24 V |
A |
4 |
||
PFHD with high demand rate acc. to EN 62061 |
1/h |
0.00000001 |
0.000000012 |
|
PFDavg with low demand rate acc. to IEC 61508 |
|
0.000015 |
0.000018 |
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