Siemens 5ST3020 - 1NO + 1NC FAULT SIGNALBLOCK ACCESO. FOR 5SJ4/5SJ/5SP4

The Siemens 5ST3020 is a fault signal block designed for use with Siemens 5SJ4, 5SJ, and 5SP4 series devices. It features 1 normally open (NO) and 1 normally closed (NC) contact for signaling fault conditions, ensuring quick detection and response to electrical system issues. This accessory enhances the safety and monitoring of your installation, providing clear indication of faults and helping maintain system reliability in industrial and commercial applications.