Relay contacts and Interlock

Introducing the Isolated Contacts Interface for seamless integration and enhanced safety in your power supply setup. This interface card features four make-or-break relays along with additional interlock functionality, providing versatile control options for your applications.


Programmable via Ethernet, this interface is designed to meet your specific needs with ease. Isolated and floating to 1000 V DC, it ensures safety and reliability in operation, even in demanding environments.


Features include four relays with make-and-break contacts, along with an additional floating interlock or 24 V enable system. With its comprehensive features and robust design, our Isolated Contacts Interface offers flexibility and peace of mind for your power supply applications. See the data sheets below for more information.


  • 4 relays with make-and-break contacts
  • Additional (floating) interlock or 24 V enable system
  • Programmable via Ethernet
  • Isolated from the output voltage, working voltage 1000 VDC
  • Floating relative to earth


  • For SM3300 and SM15K series only, multiple INT MOD CON per unit allowed
  • Installation in all slots possible 
  • Combination with all other interfaces for SM3300 or SM15K series possible
  • Easy to plug in by user on site


  • Relay contact voltage and current: 60 V / 2 A
  • Floating interlock: 5 V (open circuit)
  • Nominal input voltage: 24 VDC
  • Insulation programming connector - internal circuits: 1000 VDC
  • Operating temperature: -20 to +50 ºC


  • Safety: EN 60950 / EN 61010

Dimensions and weight

  • Width: 25 mm
  • Height: 77 mm
  • Depth: 77 mm
  • Weight: 80 gr

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Data sheets Type/Format Size
Data sheet Interfaces SM3300 series pdf 371.39 KB
Data sheet Interfaces SM15K series pdf 353.74 KB
Manuals Type/Format Size
Manual Interfaces SM3300 series pdf 634.66 KB
Manual Interfaces SM15K series pdf 1.1 MB