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11.6.3 Terminal wiring for the various
modes of operation
Standard operating mode of the high-pres-
sure nozzle system is „supply air humidifica-
tion“. Optionally, a „combined unit“ that
supports both modes of operation in a switch-
able form may be ordered (for further infor-
mation concerning the various modes of
operation, see section 4). Each of the opera-
tional modes requires a particular terminal
wiring that is shown in the figs. below. Any
switching contacts (to be supplied by the cus-
tomer) need only be low-voltage proof. If the
system is modified on the customer site, the
digital inputs on the main board and possibly
on the extension board must be parametrized
accordingly (s. section 13).
The parameters
in question are indicated in context of the
respective terminal wiring depicted hereun-
der. Depending on the particular implementa-
tion, the connections in question may also be
made via the central terminal block X1.
11.6.3.1 Terminal wiring for supply
air humidification (standard
delivery)
1-step operation
Operation with active humidity sensor or
external controller
When driving the high-pressure nozzle sys-
tem with an active humidity sensor or through
an external controller ( e.g. a PLC), physical
control signals in the range of 0...10 V, 0...20
mA or 0...140
Ω
can be used. For each of
the signal variants a particulat terminal is pro-
vided on the mainboard. In all cases, refer-
ence potential is terminal 4, „GND“.
If an external control signal 0...10 V is used,
wiring is to be made to terminal 4 (GND) and
5 (signal) . Wiring for a resitive signal 0...140
Ω
is across terminals 4 and 7. A humidity
sensor with current output 0...20 mA is to be
wired across terminals 4 (GND) and 6.
Wiring variants (exemplary):
20 VDC
Terminal strip on ST08
Terminal 3/5 wiring on the mainboard (terminal
strip on ST08) for 1-step operation
3
45
6
7
8
S1
S1: NO contacts
3
45
6
7
+20 VDC
Humidity sensor
GND
0...10V
8
Terminal 3/4/5 wiring on the mainboard (terminal
strip on ST08) for connection of a humidity sensor
0...10 V
Terminal strip on ST08
