IVEPR 12/2 RS-R3

IVEPR 12/2 RS-R3
IVEPR 12/2 RS-R3
Designed for 12V DC uninterruptable power supply to security and fire alarm system RUBEZH address system devices.
Line input voltage 130…265 V
Rated load current 0...2 А
Output DC voltage
- mains operation
- battery operation

13,3…13,8 V
9,4…13,5 V
Battery turn-off voltage with protection against deep discharge 10,4 V ± 0,3 V
Unit own consumption from battery in stand-by mode at most 30 mA
Unit consumption in battery deep discharge protection mode no more than 10 mA
AC voltage consumption no more than 60 W
Operating temperature range from -25 to +50 ºС
Average service life 10 years


The unit has the address in the system and state data generation and transmission to receiving and control device Rubezh-2OP prot. R3. via address communication line. IVEPR 12/2 RSR PROT. R3 has two power outputs with separate short circuit protection. The unit meets GOST R 53325 requirements.
The unit provides stable twenty-four-hour 12V DC power supply to security and fire alarm systems equipment with nominal current 2A. To increase back-up time, any required number of external back-up power boxes BR 12 (produced by Rubezh) may be connected to the unit. The unit is certified as per GOST 53325-2009.
The following messages may be generated and transmitted to receiving and control devices of fire alarm and security system via address communication line using RS-R3 protocol:


  • Battery discharge 
  • Battery discharge is rectified 
  • No Battery available 
  • Battery is connected 
  • Power supply interruption 
  • Battery discharge 
  • Battery discharge is rectified 
  • Battery available 
  • Battery is connected 
  • Power supply available


  • No output voltage, voltage is  < 9V (output 1)
  • No output voltage, voltage is  < 9V (output 2) 
  • Deep discharge of Battery 
  • Deep discharge of Battery

Besides, the unit may transmit to PPKOPU current mains voltage, each output voltage, and voltage of each of two Battery.


  • optimal Battery charge due to constant testing circuit;
  • batteries protection against deep discharge and overcharge.
  • electronic protection against reverse polarity and Battery terminals short circuit. During mains operation, reverse polarity or Battery terminals short circuit does not affect output voltage;
  • unit electronic protection against short circuit and current overload, both in mains operation and battery operation mode. When short circuit or overload state is cleared, output voltage of the unit restores automatically.


  • possibility of address communication line connection to transmit data on power supply unit state; 
  • automatic Battery charging when AC main is available;
  • automatic switching to battery operation mode when voltage is below min operating value and mains operation mode restoration when mains voltage is available; 
  • low level of high frequency noise due to optimal topology of the PCB; 
  • output voltage is electrically isolated from the housing.


  • when 230V is available, LED is green;
  • when 230V is not available, LED is off.


  • when voltage is on at least one output (no short circuit condition), LED is green;
  • when no output voltage is available, LED is off.

Battery  LED:

  • if at least one Battery is charged and properly functioning, LED is green;
  • when Battery charging level is 80%, LED is orange ("precharging" mode);
  • when both Batterys are not available / malfunction / wrong connection (reverse polarity), LED is red.

To transmit information on malfunction available to external circuits, signal "Emergency" is provided in the form of magnetoelectric relay. "Emergency" alarm output is insulated from the source circuits and housing. When both mains power, at least one functioning and charged Battery, and output voltage are available, relay is closed.  Otherwise, relay is opened.

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