Yokogawa Pneumatic Retractables RF20H - Manual (Page 4)

IM 12B06K07-E-E
2. Product description
2.1 Control unit RF20C (EXmatic 460)
Figure 1: Control unit outside
View from outside
1 Operating panel
2 Function keys
3 Return button
4 ESC button
5 Main switch
Figure 2: Control unit inside
View from inside
6 Terminal board
7 Indicator/pressure switch
8 Pilot valve
9 Input multi hose
Function The control unit RF20C (EXmatic
460) can fully automatically control
and monitor the measuring and
cleaning cycles of a pneumatic
retractable fitting. For doing this,
the cleaning times, measuring
intervals and the starting times can
be parameterized and adjusted to
the respective specification.
Input The control monitors the respective
position indication of the retractable
fitting via integrated inputs.
Automatic cleaning can be started
via an external input.
Output The respective condition of the
retractable fitting and of the control
can be transmitted to a higher
process control system via three
contact outputs.
Retractable fitting
The retractable fitting and the
cleaning valves for controlling the
cleaning solutions are connected
to the control unit by means of
pneumatic hoses. This should be
done with the adjusted multi hose.
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