7SR5421-6BA16-0AA0Brand: SiemensMPN: 7SR5421-6BA16-0AA0Transformer protection (2 wdg.) 8 curr. trans., 4 volt. trans., 37 BI (standard), 18 BO (incl. 4 HDBO (Heavy Duty)), Standard interface: 1 x USB (front), RS 485Request a quote