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4.6 Electrical connection
Danger of electric shock!
Dangerous electric voltage!
All work relating to the electrical installation
may only be carried out by designated spe-
cialist personnel (electrician or qualified per-
son with equivalent training).
The customer / operator is responsible for
monitoring the qualifications of the specialist
personnel.
Potential component damage due to elec-
trostatic discharge!
To protect the sensitive electronic compo-
nents, measures to prevent damage due to
electrostatic discharge must be taken before
the start of the installation work.
4.6.1 Connection of control voltage
The control voltage of 230 VAC is to be
applied to the board which is closet to the
cable gland on the underside of the housing.
The plug designation differs depending on
the level of expansion:
The pin assignment is identical for all plugs. L
and N are labelled on the plugs.
4.6.2 Connection of interlock (safety)
system
Danger of electric shock!
Dangerous electric voltage!
After the initial operation of the unit, a
230 VAC voltage is present at terminal 1
when standard wiring is used.
The so-called interlock (safety) system is
located between terminals 1 and 2. Safety
equipment can be wired into the interlock
(safety) system. If the interlock (safety) sys-
tem is open, the humidifier is not operational
or the operation is interrupted.
The interlock (safety) system is not closed
when delivered ex-factory!
The contacts, which are connected to termi-
nals 1 and 2 must be potential free and suit-
able for switching of 230 VAC.
Type of board
Plug designation
Mainboard
ST1
Extension board
ST1.1
Relay board
ST11
:$51,1*
3OHDVHQRWH
127,&(
127,&(
:$51,1*
Terminals 1/2 on the mainboard (socket ST1)
for connection of the interlock (safety)
Safety equipment
system
2 1 L N socket ST1
3OHDVHQRWH
3OHDVHQRWH
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