Siemens PolyCool Superheat CPS40 Manual De Instalación Y Servicio página 44

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6.3 Application
PolyCoolä 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 ex-
ternal 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)
Superheat - CPS40
Controlling the cooling capacity
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CE1U3372xx
2018-11-09