UDL 2-4a

● Overpressure control panel with output for connection of 24 V drives

● Integrated power supply constructed and certified according to DIN EN 12101-10

● Control unit designed according to prEN 12101-9

● One RWA group, three reporting lines:

- Line T 1: automatic fire detectors
- Line t: Signal button RT 2 as
a) Main control panel with displays Operation o, Alarm r, Fault s and Reset button r. Also
Main control panel with mini buzzer S (alarm / fault) and position indicator A can be connected
b) Nebenbedienstelle with display alarm r
- Line T 2: Connection of a differential pressure switch (DDS)

● Resetting the alarm / detectors with push-buttons in the main control panel or in the control panel

● Selectable functions:

- "Auto-close" (automatic closing after resetting an alarm)
- "Fault = alarm" (alarm in case of fault of a signal line)
- "Thermal alarm" (alarm when exceeding a housing internal temperature of 70 ° C)
- "2-detector-dependency" (2-detector-dependency for automatic fire detectors in line T 1)
- "PK-r 1" (PK-r 1 switches to line T 1 when pre-alarm and alarm are activated when the 2-detector dependency is activated)

● Connection option for ventilation button, also with position indicator On A

● Adjustable ventilation position h and ventilation time D

● Connection possibility of an external wind and rain control, z. B. WRS (per control panel is a separate
Contact required). Internal wind and rain control optional

● possibility of connecting an external fault contact (eg the fire fan control)

● Potential-free contacts alarm r 1, alarm r 2 and fault s

● Display operation o, alarm r and malfunction s in the housing door

● Internal service display for detailed status display during maintenance and installation
● Plug-in connection terminals (except drive output)

● The use of K + G / Grasl drives is recommended. When controlling third-party drives is the compatibility
to consider. See also section 6 "Technical data"

● Connectable drives: 24 V drives, travel time for full stroke at nominal load (total travel time) <4 minutes

● Drives must be suitable for the restart function (see 3.7)

● If the direction of travel is changed directly, the drives are briefly stopped before changing direction

● Sheet steel housing, light gray (RAL 7035)

options:

● WTM: Outputs for controlling external warning devices in the event of an alarm or fault (eg multi-tone sounder MS and
Flashing light BL)

● WRM: Internal wind and rain control