RZ25 / RZ50 / RZ75 compact control units

for stairwells and smaller projects

  • Compact, robust steel housing
  • Regulated output voltage
  • Connection of up to 5 central control units, with real cable monitoring
    • up to five physically separate ventilation groups
    • Central ventilation push-button function for all connected central control systems
  • Comfortable and clear status, error and fault signalling via LED indicators
  • Wide range of adjustment and application functions:
    • Automatic ventilation <CLOSE>: with programmable time selection
    • Dead man's switch function in <OPEN> and <CLOSE> direction
    • Runtime limitation for ventilation, adjustable
    • Integrated, acoustic alarm signalling device with switch-off function
    • Automatic closing of windows in case of power failure
    • Selection of the drive running direction in the event of an alarm
  • Relay outputs for alarm and faults
  • RZ50/RZ75: connection of wind/rain detector without auxiliary module, with integrated evaluation and wind measurement (adjustable wind speed)
  • Easy to install, commission and maintain
  • Maintenance interval: signal for yearly maintenance/inspection
  • Connection to BKS-NET bus

Technical data

TypeRZ25RZ 50RZ75
Operating voltage
Nominal voltage
Output current3.2A6.5A8.4A
Connection cross-section for mains / drive line
Emergency power supply (backup batteries)

RWA and ventilation groups
Max. number of RWA groups111
Max. number of ventilation groups111
Linking of multiple control centresup to 5 central control units = 1 RWA and up to 5 ventilation groups possible
Alarm triggering and ventilation control
Alarm line 1: manual triggeringMax. number of RWA push-buttons 'HSE'101010
Alarm line 2: automatic triggeringMax. number of smoke/heat detectors101010
Triggered via FASoptionaloptionaloptional
Ventilation controlVentilation push-buttonany (without LED), 10 (with LED)any (without LED), 10 (with LED)any (without LED), 10 (with LED)
Connection of wind/rain detectoryesyesyes
General information
Protection type
Dimensions (WxHxD)
Dimensions (WxHxD) with IP 54 installation kit
Surface-mounted housingsheet-steel, RAL 9010sheet-steel, RAL 9010sheet-steel, RAL 9010
Ambient temperature range-5 °C up to +40 °C-5 °C up to +40 °C-5 °C up to +40 °C


  • Area of application: Smoke and heat exhaust ventilation systems (RWA)
  • Product type: Electrical controller
  • Operating voltage: 230V
  • Application: Staircase (smoke ventilation acc. to MBO/LBO)
  • Feuer-/Rauchschutz: yes
  • Anzahl Antriebe pro Zentrale_prodmerk: 1 - 4

Smoke and heat exhaust ventilation systems (RWA)

Do you have any questions? Contact us via email, we are happy to help:

[email protected]