24 V power supplies and DC UPS now also with OPC UA

OPC UA (Open Platform Communications – Unified Architecture) is a multi-vendor standard for horizontal and vertical communication. It is based on the client-server principle, is platform-independent, and supports extensive security mechanisms.

OPC UA – an important standard on the path to digitalization

With the implementation of the OPC UA server in the firmware of the SITOP PSU8600 and SITOP UPS1600 devices, these can be used in automation applications with OPC UA clients of various manufacturers (e.g. controllers or PCs). The OPC UA data model gives users access to all parameterization functions, diagnostics and operating information of PSU8600 and UPS1600. For example, faults such as overload or power failure are signaled and the energy information of the DC outputs is communicated.

SITOP PSU8600 and UPS1600 with OPC UA and PROFINET the open communication concept standards for Industry 4.0.

PSU8600 power supply system with network capability

Used as central DC power supply with selective load monitoring (extendible to up to 20 outputs) and mains buffering (into the minute range) of large plants or machines with networked automation systems of various manufacturers

UPS 1600 uninterruptible power supply with network capability

Used in PLC-based and PC-based automation solutions from other manufacturers whose 24 Volt supply is to be protected against power failure (buffering up into the hour range)

Setting options:

  • Switching on and off of individual outputs for direct control of consumers or for energy saving

  • Program-controlled voltage change of individual outputs for consumers such as DC motors

  • Freely configurable messages on status of outputs for preventative maintenance


  • Early detection of dynamic, continuous or growing number of overload states using actual current values

  • Status message of outputs (On, Off, Overload)

  • Detection and logging of short-term power and phase failures for analyzing the mains quality

  • Pre-warning regarding system overload and overtemperature

  • Recording of energy information (current, voltage) for each output to determine possible energy-savings

Setting options:

  • Program-controlled setting
    of the voltage threshold from which the buffering should start

  • Buffer time and reactions to status and alarm messages of the UPS


  • Information on device data and parameters

  • Information on state of power supply:
    - Pending alarms
    - Alarm history
    - Load current
    - Input voltage
    - Remaining buffer time
    - Battery temperature
    - Battery charge
    - Measured charging current
    - Battery capacity