20
[MBA_NKBD_EN] Rev.: 10/2015
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11.3 Control and regulation
If a hygrostat and continuous controller are connected at the same time, the hu-
midifier always runs first the larger request.
11.3.1 Hygrostat control
HYG 1:
50 % of nominal humidifying capacity
-
connection 3 and 4
HYG 2:
100 % of nominal humidifying capacity
-
connection 5 and 6
When connecting several NKBD humidifiers to one hygrostat, they must
be connected in parallel; see circuit diagram (see chapter 18).
11.3.2 Continuous control
The NKBD is capable of processing 10 different external controlled variables (Tab. 11.1).
Coding is shown on the circuit diagrams, including load.
The control cable must be connected at
9(+)
and
10(-)
paying attention to correct phase
sequence (+/-).
From the factory, the control variable 0-10 VDC is always coded.
The connection of the continuous control is shown in the circuit diagrams in Chapter 18.
11.3.3 Control signal encoding
The encoding of the input variables below
usually carried out by the 6-pin DIP-switch
S1 on the control board.
DIP-
switch
fig. 21 - control board
Tab. 11.1 Coding table for DIP-switch
Control
1
2
3
4
5
6
Load
input resistance
0 - 20 mA
on
on
-
on
-
-
110.0 mW
275 Ω
4 - 20 mA
on
-
on
on
-
-
110.0 mW
275 Ω
0 - 5 VDC
-
on
-
on
-
-
7.3 mW
3425 Ω
1 - 5 VDC
-
-
on
on
-
-
8.0 mW
3125 Ω
0 - 10 VDC
-
on
-
on
on
-
30.0 mW
3333 Ω
2 - 10 VDC
-
-
-
-
on
-
30.0 mW
3333 Ω
0 - 16 VDC
-
on
-
-
-
on
77.0 mW
3325 Ω
3 - 16 VDC
-
-
on
on
-
on
77.0 mW
3325 Ω
0 - 20 VDC
-
on
-
-
on
on
140.0 mW
2857 Ω
4 - 20 VDC
-
-
on
on
on
on
130.0 mW
3077 Ω
Hyg 1/2
-
-
-
-
-
-
