Application; External Capacity Control (Ext.) - Siemens PolyCool CPS 40 Manual De Instalación

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6.3 Application

PolyCool Superheat supports four different types of application
(configuration modes).
Application 1 represents pure superheat control (default). It has
been described in the previous chapter. The other three
applications are the following:

6.3.1 External capacity control (EXT.)

Input X4 can be used to directly change the setpoint of superheat
within the limits specified in the parameter mode (SMX) by
applying a DC 0...10 V / 4...20 mA signal based on the
configuration of external signal direction (SD). Usually, this signal
is delivered by an external controller (i.e. Synco, Saphir and other
third-party.) whose task it is to maintain the medium temperature
at a constant level. The controller measures the medium
temperature, calculates the manipulated variable and converts it
to a DC 0...10 V / 4...20 mA signal.
10 V / 20 mA min. Q
0 V / 4 mA max. Q
When SD=-1 (see page 36, picture 12)
CPS40
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2013-10-01