What is SIL3/PLe and SIL2/PLd

Enquire about Safety Relays

What is SIL3/PLe and SIL2/PLd

The DS range of speed and standstill monitors are all SIL3/PLe and SIL2/PLd certified.

The abbreviation SIL (Safety Integrity Level) comes from the field of functional safety and is used in the international standard IEC 61508. The specific standard of safety-relevant electrical control systems is defined in the IEC or EN 62061.

The reliability of safety functions of electrical systems is classified into four different safety integrity levels. These classifications are SIL1 to SIL4. SIL1 is the lowest reliability classification and SIL4 the highest. The DS range of safety speed monitors can achieve a SIL3 safety integrity level.

PL (Performance Level) is used similar to the safety integrity level when calssifyong safety classes. The performance level falls under the standard ISO 13849. This classification takes place from PLa to PLe. PLa is the lowest risk reduction and PLe the highest. The DS range of safety relays are certified up to PLe.

The picture below depicts the risk analysis which assists in the performance level calculation. The first analysis step S determines the severity of the injuries that can be obtained due to an accident. The analysis F deals with the frequency of a possible accident or the duration of the user's stay under the risk. There is also a section regarding the possibility to avoid the threat and the limitation of the damage that might occur. Consequently, high-risk applications require components with the highest performance level PLe, such as the DS Range of speed monitors.

The table in the picture compares the performance level to the corresponding safety integrity level. As a result, the combinations SIL3/PLe and SIL2/PLd can be derived.

What is sil3/PLe and SIL2/PLd


Visit Motrona Safety, Motion, Control and Interface for more information

Sensor Power Supply

Encoders & Position Sensors
Rotary Encoders

Incremental Encoders Absolute Encoders Analogue Output Encoders
Hollow Shaft Leine & Linde Incremental Encoders Hollow Shaft Leine & Linde Absolute Encoders TWK Analogue Output Rotary Encoders
Soild Shaft Leine & Linde Incremental Encoders Solid Shaft Leine & Linde Absolute Encoders Celesco Analogue Output Rotary Encoders
Hollow Shaft Thalheim Incremental Encoders Hollow Shaft Fraba Absolute Encoders  
Solid Shaft Thalheim Incremental Encoders Solid Shaft Fraba Absolute Encoders  
Scancon ATEX Incremental Encoders Scancon ATEX Encoders  

Encoder Tester | Encoder Simulator | Resolvers | Slip Rings | Tacho Generators | Strip Guiding Systems | Magnetostrictive Sensors Temposonics R-Series | Magnetostrictive Sensors Temposonics G-Series | Magnetostrictive Sensors Temposonics E-Series | PT8 Series 0-1,5m Analog Sensors | PT9 Series 0-13.0m Analog Sensor | PT9 Extended Series 0-4,3m Analog Sensors | PT5 Series 0-6,35m Analog Sensors | PT1 Series 0-1,25m Analog Sensors | SP Series 0-1,25m Analog Sensors | SR1 Series 0-3,0m Analog Sensors Magnescale Absolute Angle Encoders | Magnescale Absolute Linear Encoders | Magnescale Incremental Linear Encoders | Digital Sensors | Linear Potentiometers | Linear Encoders | Lazer Measurement Inclinometers Accelerometers Safety Light Curtains | Safety Mats | Safety Bumpers | Robust Encoder

Electrical Enclosures
Electrical Enclosures | Wall Mounted Enclosures | Floor Standing Enclosures | Consoles | Stainless Steel Wall Enclosures | Stainless Steel Floor Enclosures | Motor Control and Power Distribution | Elsteel Modular Enclosures & DB Panels | Panel Airconditioners | Filter Fans | Liquid Chillers | Normand Switchgear | Anti Condensation Heaters | Thermostats | Panel Lights | Flex Power Supplies | Battery Chargers | Panel Builders | Home | About Us | Contact Us | Enquiries | Sitemap | Careers

Drives and Motors
Fuji Frenic AC Drives | Soft Starters | DC Drives | Fuji HMI | DC Motors Braking Resistors Communication Protocols | Servo Drives | Touchscreens - HMI | Servo Motors | Torque Motors | Linear Actuators | Planetary Gearboxes