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MDU-1 prot. R3, MDU-1S prot. R3

MDU-1 prot. R3, MDU-1S prot. R3
Control modules of smoke exhaust valves MDU-1 prot.R3, MDU-1S prot.R3 are designed to control valve gate in manual mode via remote control buttons or in automatic mode using receiving and control device. It is designed to operate as a part of address system controlled by receive-control alarm device Rubezh-2OP prot.R3.
Number of controlled valves 1
Power supply from DCL (24 - 36 V)
Current consumption from DCL, no more than 0,3 mА
MDU-1 prot.R3 and MDU-1S prot.R3 power supply at:
24 VDC drive control
230 VAC drive control

и24±4V power supply source
mains 220V, 50 Hz
Length of connecting lines to control buttons, at most 30 m
Overall dimensions of the module, no more than 108х170х42 mm
Weight, no more than 220 g
Operating temperature range from -25 to +60°С
Average service life, at least 10 years

Module is designed to control the following types of valve actuators:

  • double-acting electromechanical actuator;
  • electromechanical return-spring actuator;
  • electromagnetic actuator with manual gate return.

By built-in relay, control module of smoke exhaust valve supplies voltage to the electromechanical actuator. Switching voltage is 24VDC or 230VAC. Switching voltage is selected by jumper Jp1 at module's board.  Difference of MDU-1 prot.R3 with respect to MDU-1S prot.R3 is in relay capacity, which switches voltage to the actuator. Parameters may be found in the Table of technical characteristics. Other parameters and functions are similar.

MDU-1 prot.R3 is used to control actuators designed for 24 or 220V voltage. Valve gate position is controlled by limit switches either incorporated into electromechanical actuator or installed at the gate.

Control module of smoke exhaust valve is used to:
  • connect all the main types of actuators used with smoke exhaust valves; 
  • connect the device of valve manual return to safety or normal position (buttons); 
  • transmit to the unit receiving and control information about the state of the module itself and connected actuator; control valve gate via receiving and control device in automatic and manual mode; 
  • check for circuit integrity to the limit switches of valve gate position control and motor winding circuits; 
  • check for discontinuity and short circuit of manual control button external circuits; 
  • provide light indication of module operation states, gate position, and communication with the device.

The module has a possibility of valve gate transfer into the normal and safety (protective) position during system configuration with "OPEN" and "CLOSE" buttons installed on the board.

MDU-1 control module may be installed in DIN rail using special securing bar (not in the scope of supply; may be provided by separate order).

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