Siemens AG 2015 Safety Technology 11 Price groups PG 41B, 41H, 41L, 42B, 42C, 42J 11/2 Introduction Safety relays SIRIUS 3SK safety relays 11/10 General data Basic units 11/20 - SIRIUS 3SK1 Standard basic units 11/21 - SIRIUS 3SK1 Advanced basic units 11/22 - SIRIUS 3SK2 basic units Expansion units 11/23 - Output expansions 11/25 - Input expansions 11/26 Accessories SIRIUS 3TK28 safety relays 11/30 With relay enabling circuits 11/33 With electronic enabling circuits 11/36 With special functions 11/38 Accessories SIRIUS 3RK3 Modular Safety System 11/39 General data 11/47 3RK31 central units 11/48 3RK32, 3RK33 expansion modules 11/48 3RK35 interface modules 11/48 3RK36 operating and monitoring modules 11/49 Accessories Notes: More 3TK28 safety relays can be found - in the Catalog Add-On IC 10 AO 2016 at the Information and Download Center - in the interactive Catalog CA 01 - in the Industry Mall Conversion tool e.g. from 3TK28 to 3SK, see www.siemens.com/sirius/conversion-tool Click on the Article No. in the catalog PDF to access it in the Industry Mall and get all related information. Article-No. 3RA1943-2C 3RA1943-2B 3RA1953-2B 3RA1953-2N Or directly in the Internet, e. g. www.siemens.com/ product 3RA1943-2C Siemens IC 10 2016 11 Siemens AG 2015 Safety Technology Introduction Overview Functional safety of machines and plants Objective of the standards Basic safety requirements in the manufacturing industry It is the objective of safety technology to minimize as far as pos- In order to protect people and the environment in many industrial sible the hazards from technical facilities for people and the applications in the manufacturing and process industries, ma- environment while restricting no more than absolutely necessary chines and plants must meet the fundamental safety require- the scope of industrial production, the use of machines or the ments of the EU Directives, particularly the Machinery Directive. production of chemical products. In addition to design solutions, automation systems and compo- Production automation is governed in particular by the following nents are also expected to perform safety-related tasks. This standards: means that the life and health of people and the physical integ- IEC 61508 or IEC 62061 and rity of capital goods and the environment depend on the proper operation of these systems and components, onfunctional EN ISO 13849-1 safet. The IEC 62061 standard With the introduction of the uniform European Single Market, na- The IEC 62061 standardSafety of machines Functional safety tional standards and regulations affecting the technical realiza- of electrical, electronic and programmable electronic control tion of machines were consistently harmonized. This involved system defines comprehensive requirements. It includes defining basic safety requirements which address, on the one recommendations for the development, integration and valida- hand, machine manufacturers in terms of the free movement of tion of safety-related electrical, electronic and programmable goods (Article 95) and, on the other hand, machine operators in electronic control systems (SRECS) for machines. With the im- terms of industrial safety (Article 137). plementation of EN 62061, for the first time, one standard covers The EU directives: the entire safety chain, from the sensor to the actuator. The Safety Integrity Level, or SIL for short, is defined as the applica- Define requirements which must be met by plants and their tion parameter for this standard. operating companies in order to protect the health of people and the quality of the environment Requirements placed on the capacity of non-electrical e.g. Include standards for health & safety at work hydraulic, pneumatic, or electromechanical safety-related (minimum requirements) control elements for machines are not specified by the standard. Define product requirements (e.g. for machines) to protect the health and safety of consumers Differentiate between the requirements which must be met by the implementation of products in order to ensure the free movement of goods and the requirements which must be met for the use of products Safety requirements Article 95 EC Treaty Article 137 EC Treaty (free movement of goods) (industrial safety)Industrial safet framework Safety of machines directive e.g. machines (89/391/EC) Standard EN ISO 13849-1 EN ISO 13849-1Safety of machines Safety-related compo- nents of controls Part 1: General principle replaced EN 954-1 at the end of 2011. It considers the complete range of Separate safety functions with all the devices which are involved in their directive Low-voltage Machinery performance. EN ISO 13849-1 also makes a quantitative analy-Use of directive directive sis of the safety functions. The standard describes how to deter- operating (2014/35/EC) (2006/42/EC) mine the performance level (PL) for safety-relevant parts of equipmen (89/655/EC) control systems on the basis of architectures specified for the intended service life. When several safety-relevant parts are combined to form a Harmonized European standards National laws single complete system, the standard explains how to determine the resulting PL. It can be applied to safety-related parts of con- trol systems (SRP/CS) and all types of machines, regardless of Manufacturer User the technology and energy used, e.g. electrical, hydraulic, IC01 00050 pneumatic or mechanical. Safety requirements imposed on machines and plants Siemens IC 10 2016 11/2 11