BS EN 61810‑2-1 is a part of an international product standard that focuses on electromechanical elementary relays.
BS EN 61810‑2-1 specifies reliability test procedures for electromechanical elementary relays when enhanced requirements for the verification of reliability apply. Particular provisions are given for relays incorporated in safety-related control systems of machinery in accordance with IEC 62061 and ISO 13849-1. It specifies B10 values for dangerous failures (B10D values) are derived from the tests, for such relays.
Note 1: For the calculation of MTTFd for electromechanical relays, the data provided by the manufacturer for B10D can be used.
BS EN 61810‑2 on electromechanical elementary relays is useful for:
When electromechanical elementary relays are incorporated in safety-related control systems of machinery, the meantime to dangerous failure (MTTFd) is taken into account.
BS EN 61810‑2-1 specifies reliability test procedures for electromechanical elementary relays where enhanced requirements for the verification of reliability apply. It gives a type-test that is passed and then confirmed by routine tests with specified periodicity while assessing the probability of dangerous failure.
BS EN 61810‑2-1 describes the significance of figures for B10 (the mean number of cycles until 10% of the relays have failed) that are derived from these life tests performed with representative relay samples. The users can calculate an effective MTTFd value for the relay in a particular application, with the knowledge given in BS EN 61810‑2-1 whenever the safety function of electromechanical elementary relays is concerned.
BS EN 61810‑2-1:2017 supersedes BS EN 61810‑2-1:2011, which is withdrawn. This edition includes the following significant technical changes with respect to the previous edition:
IEC 61810-2-1:2017
EN 61131-2:2007
EN 61810-2-1:2017
IEC 61131-2:2007