With powerful integrated features, the Automatic Transfer Switch (ATS) MX250 microprocessor, standard with the entire ZTS product family, offers expanded programmability and field adaptability. This premium product is designed for use in specification-grade applications. As an embedded digital controller, the MX250 series offers high reliability and ease of unattended operation across a range of applications.UL, CSA and IEC listedRinging wave immunity per IEEE 472 (ANSI C37.90A) Condusted and Radiated Emissions per EN55022 Class B (CISPR 11) (Exceeds EN55011 & MILSTD 461 Class 3) ESD Immunity test per EN61000-4-2 (Level 4) Radiated RF, electromagnetic field immunity test per EN61000-4-3 (ENV50140) 10v/m Electrical fast transient/burst immunity test for EN61000-4-4 Surge immunity test per EN61000-4-5 IEEE C62.41 (1.2 x 50 micro-seconds, 0.5 to 4 kV) Conducted immunity test per EN61000-4-6 (ENV50141) Voltage dips and interruption immunity EN61000-4-11