Service documentation series KB/KBF
BB / JTU 25.06.2000
Description Binder Humidity board Art. No. 9505-0036
for climatic chambers type KBF and KBWF
Identification printed on the board H1.001/03-03-212
Functions:
A) Measuring voltage 230V AC on the filling level detector electrode of the steam cylinder.
B) Measuring of current between the electrodes for steam production
C) Measuring of the low-level DC voltage which is the humidity demand coming from the process
controller DICON 1000/1001
As well forward transfer o this states as binary messages to the PLC humidity control as signals
0 or +24V DC.
Description A)
A pair of electrodes in a plastic container is set under voltage 230V AC to generate steam for
controlled humidification.
This container is filled with tap water via a solenoid valve until the current between the two electrodes
reaches about 2A.. In case this maximum current is not reached until maximum filling of the container
the filling limitation electrode gets 230V AC (plug connectors L1/B1 against N)
+24V are given out via plug connector “SPS I 0.1” to the PLC as message that maximum filling level is
reached.
Caution !
High Voltage about plug connectors L1/B1 and N
Do not touch!
Description B)
The alternating current trough the steam electrodes is brought via a short induction path to the
BINDER humidity board. Loop between plug connectors L1 and L2.
The exact setting of the maximum permissible current between the steam electrodes becomes
adjusted via potentiometer R4 or R5 to set the switching point to 2A as limit for the current through the
steam electrodes.
With smaller current than 2A the red LED illuminates and plug connector SPS I 0.5 gives +24V DC to
the PLC as message that the 2A not reached yet..
With higher current through the electrodes the red LED extinguishes and the voltages at plug
connectors SPS I 0.5 gets reduced to 0V as message that the 2A is reached.
Caution !
High Voltage about plug connectors L1 and L2
Do not touch!
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