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Operation and Technical Specification

Device Assignment

The galvanic isolation unit BR15 allows simultaneous connection of:

  • GPS/GPRS terminals;
  • Up to four Omnicomm BIS power protection units;
  • Up to four Omnicomm LLS fuel level sensors;
  • Up to four contactless sensors (ultrasonic sensors) or pulse converters;
  • BR15 allows the connection of other devices whose common power consumption does not exceed the maximal BR15 output power.

The galvanic isolation unit BR15 is used on vehicles with a nominal board voltage of 12 or 24 V.

Technical Specification

Table 1:

No. Specification Value
1 Input voltage, V 10 … 32
2 Output voltage, V 14.5 ± 0.5
3 Maximal output power, W 15
4 Maximal output current, A 1.0
5 Energy conversion efficiency, % Not less than 80
6 Maximal constant voltage that does not damage the unit, V 90, any polarity
7 Isolation voltage, V 1000
8 Dimensions, mm 111 × 84.5 × 31
9 Operating temperature, ˚С -40 … +60
10 Ingress protection rating IP40

Operation Principle

Figure 1

Figure 1. Block diagram of BR15

BR15 has protection against overvoltages of more than 33 V, protection against polarity reversal, and protection against short-circuits on the output.

BR15 provides stabilized output voltage and galvanic isolation between input and output. The unit operates in “step up” and “step down” modes, depending on the input voltage supply, and provides a stabilized 14.5 ± 0.5 VDC output.


The label on the box provides the following information:

  • manufacturer’s logo or name;
  • input and output voltages;
  • device name;
  • wiring description;
  • manufacturing date;
  • serial number.


The set is supplied in an individual pack.