Technical documentation
Rev. 02
Reactive Factor Controller CX plus
64
12.2 Fan activation
The controller shall take over the fan activation depending on the temperature in the switch cabinet.
Solution:
The CX plus is equipped with a temperature sensor (NTC) integrated under the housing. The limit
value, at which the switching output for the fan shall be activated, can be set in the alarm system.
Procedure:
Deactivate
the function “
Use the switching output FAN as step switching output
”
(SETUP/406).
Set the setting to “
NO
” in the SETUP menu 406 (DEFAULT).
!
CAUTION
When you switch between functions, all active steps must always be switched off one by one first,
before the control may restart. FON steps are not switched off.
Set the temperature limit 1 in the SETUP/512.
Set the temperature limit 1 in the SETUP menu 512. The temperature limit 2 (SETUP/513) may
have to be increased, because the maximum setting range of the temperature limit 1 depends on
the set temperature limit 2:
TEMP1
max
= TEMP2
– 5K
Function:
Upon exceeding the temperature limit 1, the switching output fan is switched on. The status message
“
FAN
” is flashing on the display in the bottom line in the main menu. If the temperature in the switch
cabinet falls and if the value falls below the temperature limit 1 by 5 K, the switching output fan is
switched off again after 10 s. The status message “
FAN
” is no longer shown on the display. A flapping
of the fan switching output is prevented by the temperature hysteresis of 5 K.
NOTE:
If the submenus
“INFO”, “MANUAL”, “SETUP” or “ALARM” are active, the status message
“FAN” is not displayed.
NOTE:
An active error message
/
suppresses the status message “FAN”. Reset the
error message
/
by pressing the
(ESC) key for 3 s.
