Siemens PolyCool CPS 40, Инструкция по установке и эксплуатации

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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
0 V / 4 mA
≅
max. Q
0
(100 %)
When SD=1 (see page 36, picture 12)
Mode of
operation
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Building Technologies CPS40 CE1U3372XX / H 74 319 0555 0 a
HVAC Products 22.09.2006