Přejít na: navigace, hledání

If you are in a need of a small, fully integrated, DC uninterruptible power supply, for any device that needs 12V to 24V, with low current demand, this following device is exactly what you need.

Basic backup voltage output is the voltage of the battery.

Česká verze je k dispozici zde.

One of the possible usage of the SDS-UPS device.

The SDS UPS device

  • complete electronics of the DC uninterruptible power supply
  • you connect only the accumulator (12V), transformer AC output (12V~ to 17V~) and of course the DC load
  • everything is online realtime monitored via ethernet (=> anywhere at internet)
  • there is also one user available relay (NO/NC) output there, could be controlled manually or by IP watchdog
  • total power consumption of SDS-UPS is 1.6W (when everything is working, and ethernet is communicating)
The primary input voltage (PRI) (after rectification) must be a few Volts higher then the accumulator's voltage, otherwise
the device is not able to recharge the accu.
Recommended minimal voltage at input PRI clamps is 17V DC (or more than 12V AC).
You can of course use 24V DC, but then expect 24V DC at output.
The device is targeting the small Acces Points, Routerboards, camera systems, alarm systems, small TRX devices, etc.
  • Be carefull when projecting the total power draw (amperage and power). The rule of the thumb is to use only about half

of the maximal available power rating of the device, and to derate according to ambiend temperature (or to cool it properly).

Top recommended output current draw (at output clams) is 2.5 A.
  • The device has its internals dimensioned to continuosly withstand 6 to 8 Amps, but this is mainly from the reliability point of view - you have to provide correct cooling to use this amperage continously. Anyway we do not support this officialy.
  • The device is mostly perfcet for ISP - the information of PRI power failure, online monitoring (all voltages, all currents, kWh consumption) via web and SNMP, and also the IP watchdog and SDS-C


SDS UPS ONEDPS is the ONLY product sold by now. It consists of ONE single PCB in DIN enclosure.

FORMER, now not sold, VARIANTS:

SDS UPS rev3 is build from a pair of SDS MICRO with a special firmware, and a UPS PCB. Could be installed together to EU/DIN typized housing.

SDS UPS rev1,rev2 - not to be found anywhere anymore.

For a PoE function realization, you need an external module, f.ex. SDS-SWPOE.

Note: the default primary power source is mains (e.g. transformer, with secondary winding connected to SDS-UPS). But, you can connect the solar panels (in a proper voltage/current configuration) as a primary power, and let it power the load and recharge the batteries.

The picture of the SDS-UPS ONE DPS device: Soubor:An_d_cz_SDS_UPS_full_2.jpg


Basic functions of SDS-UPS
DC uninterruptible power supply - always DC at output, can have AC (or DC of course) at PRI input
"PRI" input is connected directly to mains transformer secondary winding, the fuse is on PCB
module directly connects to an accumulator, allows for hot-swaping, the fuse and charger is all integrated on PCB
PoE is available externally, using the SDS-SWPOE modules
there is no power loss in the moment of primary power supply failure (we use diode matrix, no slow relay switches)
module provides a smart power balancing, it tries to draw more power from primary input than from an accumulator, thus saving it
PCB dimension enclosed in the EU/DIN box
accumulator charging controlled by processor (internal algorithm or used supplied one), accumulator is protected against deep discharge
everything is user customizable - even the charging voltage and currents (for CC and CV modes), all via web or SDS-C
online monitoring (Ethernet 100Mbit), live web interface (fully graphical, repaints each 1 second)
online visualisation of PRI and ACCU inputs (U & I), all is also available via SNMP
continuous power consumption metering (Wh, kWh)
IP watchdog, can control the onboard relay
history log, accesible from web interface, and also logging of all user IP
ethernet: web interface, web-snippet (temperature), SNMP, XML, proprietary UDP, NTP client, etc.
SNMP: custom MIB (download the MIB file for free)
module can read up to eight of 1-Wire® thermometers
three optocoupled binary inputs, available also on SNMP, useable as BIN inputs or as S0 counters
device is fully user controllable by utilising the user provided SDS-C program

Other details and pricing

For international orders, pricing, etc., please use our eshop.

For online demo, please contact us as well.

Osobní nástroje