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3.6.5 Connecting the digital input (DI)
The digital input on the mainboard can be
used for switching functions.
The digital input must be wired on-site in
accordance with its use, e.g. with as push-
button or a switch (also see chapter 5.8.8
„Function parameters“ ).
Digital input (DI) wiring examples
3.6.6 Wiring for control signal and
safety (interlock) system for
multiple units
In the case of multiple units, separate humid-
ifiers work together. The control signal and
the safety (interlock) system are connected
to the master unit as described above. In
addition, connecting cables are established
between the guiding unit and the successing
unit(s) (provided on-site). These provide the
successing unit with a control signal from the
guiding unit and the transmitted (potential
free) safety (interlock) system.
The wiring for the control signal and the
safety (interlock) system must be imple-
mented as follows for multiple units:
1)
„ST0x“ designates connector plugs on the mainboard
2)
„K20“ is the relay used for the connection of the suc-
cessing unit with the installed option (CN-07-10012) or
the enclosed option (CN-07-10002)
3
45
6
7
8
Terminals 3/8 provided for connecting the digital
input
- mainboard (terminal strip ST08)
- extension board/relay board (terminal strip ST05
DI
3
45
6
7
8
Terminal strip ST08/ST05
DI
push button
switch
20VDC
20VDC
12
13
11
14
5
4
1
2
ST07
K20
ST08
ST01
Guiding unit
Successing unit
1)
1)
1)
2)
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