Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz. Part 2-2. Immunity requirements for mains communications equipment and systems operating in the range of frequencies 95 kHz to 148,5 kHz and intended for use in industrial environments
Functional safety of electrical, electronic, programmable electronic safety-related systems. Part 5. Guidelines for methods of the determination of safety integrity levels
