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3. Description of control
3.1 General description
The control is integrated into the steam
humidifier and is operated via a 3.5" graphic
display on the front of the unit.
The only other operating element, which is
also located on the front of the unit, is a con-
trol switch whose positions are assigned as
follows:
Pos. "0": The unit is switched off
Pos. "I": The unit is switched on and the con-
trol is active
Pos. "II": The cylinder water is pumped off
manually without the participation of the con-
trol. The control is not active, the display
remains dark.
By changing the parameters, the user/opera-
tor can adapt the control to the system speci-
fications and the special characteristics
relating to the use of the unit.
Details of the operation of the unit are pro-
vided in the Glossary (see Section 6).
3.2 Layout of control
The control consists of the 3.5" screen and
the mainboard. The mainboard can be
expanded for additional functions with one or
2 relay boards (with 3 relays each) and addi-
tional optional relays in DIN rail format.
The relay boards are connected to the main-
board via a plug system.
The DIN rail relays are connected via cables
with plug. 2 additional relay modules can be
used, with 2 relays each.
For use with double cylinder units, an expan-
sion board is added to the mainboard.
The fuse protection of the control voltage for
all boards with 2 x 2.5 A fast (F1, F2) takes
place on the mainboard.
The external circuitry for the control voltage
and the interlock (safety) system are con-
nected directly to the mainboard on plug ST1.
If additional boards are connected, the con-
nection moves from the mainboard to the out-
ermost board (see sketch).
Control switch
ST1
N
L
1
2
Relay
board
Main
board
ST1.1
ST1.2
ST1
Connections:
L, N: 230 VAC control voltage
1,2: Interlock (safety) system
ST1.1
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