SITOP add-on modules – all-round protection à la carte
The quality of power supply units alone can’t guarantee a fault-free, 24-V supply. Critical processes & plants require protection measures against power failures, extreme variations in the mains voltage, or a faulty load. SITOP add-on modules protect your production from hazards on the primary and secondary side and allow SITOP power supply units to be flexibly expanded up to all-round protection.
![Product line picture of the SITOP add-on modules SITOP add-on modules: expansion modules for higher system availability up to total all-round protection](https://assets.new.siemens.com/siemens/assets/api/uuid:ff71ea6b-663f-4f53-a911-30147942a950/width:100/quality:low/crop:0,1008991008991009:0,10142348754448399:0,7982017982017982:0,800711743772242/SITOP-add-on-modules-expansion-modules-for-higher-system-availability-up-to-total-all-round-protection.jpg)
The quality of power supply units alone can’t guarantee a fault-free, 24-V supply. Critical processes & plants require protection measures against power failures, extreme variations in the mains voltage, or a faulty load. SITOP add-on modules protect your production from hazards on the primary and secondary side and allow SITOP power supply units to be flexibly expanded up to all-round protection.