4.4
Auxiliary circuit
transformer
The multi-voltage auxiliary circuit transformer has a primary winding for 230 V (protected by fuses,
10.3x38 mm) and a secondary winding (24 V). The transformer is connected and checked in the factory,
according to the rated voltage.
4.5
Main control
board
The auxiliary connections must be made by running the cables from the outside into the electrical panel
compartment through the cable gland located on the side of the humidifier until reaching the plug-in
screw terminal block located on the bottom of the electrical panel (as shown in the figure). It is
recommended to secure the probe, remote ON/OFF contact connection cables etc. with appropriate
cable ties, in order to prevent disconnection.
Fig.4.d
Note: terminal Z only available on UG180.
c.pHC control board
300090_020_R01
M2M9
1 2 1 1 2 3 1 2 34 52 1 2 1 12 21 2 3 4 5 6
J17C
G
2 1
J17L J23 J24 J19J20J3 J16 M3 J18
2 1
J21
M8 M1 M5 M6M12
1 1 2 3 4 5 6 7 82 1 13 2 31 22 1 2 1 2
main probe
ext. regulator
GND
GND
Remote
ON/OFF
limit probe
12Vdc
Control signal
Ethernet
GND
RS485 Serial
L+
L-
Alarm
r
elay
NO
NC
C
NO
C
Unit
status
relay
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