The certificate shows, that a component/subsystem can be used in a specific application according to a requirement class (RC) or a integrity level (SIL).  The system integrator and end user must always be aware of how to use certified  components/subsystems in safety-related function, respectively  a safety  instrumented system. Because of the many different possibilities, how to configure a safety system, the end user must get the related information from the manufacturer of the certified component/subsystem.

Working in partnership with the policy lead at BERR (The Department for Business, Enterprise & Regulatory Reform), NWML is the UK Enforcement Authority for the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulations 2008 (the “RoHS Regulations”).  These Regulations implement EU Directive 2002/95 which bans the placing on the EU market of  new electrical and electronic equipment containing more than agreed levels of lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyl (PBB) and polybrominated diphenyl ether (PBDE) flame retardants. Manufacturers need to understand the requirements of the RoHS Directive to ensure that their products, and their components, comply.