Carel plug-in PJ32C, User Manual

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The various models are differentiated according to the following functions and performance:
•
operating mode and number of inputs and outputs for versions S, Y, X and C;
•
complete versions (hereafter:
7RS) with serial connection, status LED, fastening from front panel, removable terminals;
•
compact versions (hereafter:
(FR) with fixed terminals and fastening only using rear bracket, and without serial connection;
•
the power supply can be one of the following: 230Vac, 115Vac or 12Vac/Vdc;
•
the field of measurement for all models is from -50 to +90
°
C (-50
÷
127
°
F), with resistive NTC probe;
•
a PTC probe is available with the same field of measurement, for one model only (PJ32S
(FR);
•
digital input from free contact: in models where featured it is an alternative to the second probe;
•
relay outputs: available with three different current ratings, 5A, 8A and 12A (for resistive load);
3-6
This represents the ideal solution for the management of static refrigeration units (that is, without fan on the evaporator), operating
at normal temperature (above 0ºC). This instrument, in fact, performs the functions of thermometer, displaying the temperature of
the unit, and electronic thermostat, activating the compressor (or the electrovalve in the case of multiplexed units) so as to maintain
the required temperature. Furthermore, it handles automatic defrost using the forced shut-down of the compressor, and safety
functions through management of the time settings.
•
All the S models use just one probe for the control functions (AMB. T.), and feature a changeover relay contact for the control
of the actuator (COMPRESSOR).
•
In some models (PJ32S00 or S0P) a second probe can be connected to display the product storage temperature; this probe does
not affect control.
•
There is a model (PJ32S20) with a digital input and two relay outputs: actuator control and output alarm with changeover
contact.
•
The models (PJ32S0P and S1P) use a 12A resistive relay with changeover contact. In all the other models the relay is 8A
resistive;
•
There are a significant number of versions, both
7RS and (FR, with 230V, 115V and also 12V power supply.
3-<3-;
These are designed for the management of static units operating at low temperature (that is, below 0ºC), which require 'active'
defrost using electrical heating elements or the injection of hot gas. The PJ32Y or X, in fact, as well as working as a thermometer
and a thermostat like the S model, also manages the defrost actuator. The frequency and duration of the defrost can be set. The end
defrost can occur according to the temperature reached (connecting a probe to the evaporator) or by time.
•
The Y models feature two probe inputs, for control (AMB. T.) and for defrost (DEF. T.).
•
The X models, on the other hand, feature just one probe and a digital input; for these models, timed defrost is compulsory.
•
There are two relay outputs for the control of the actuator (COMPRESSOR) and for DEFROST control, with changeover
contacts, the relays used are 8A resistive.
•
Almost all models feature removable terminals (
7RS), with 230 or 115V power supply. There is just one Y model ((FR) with
12V power supply.
3-&
These represent the most complete solution for ventilated units operating at low temperature. In these models, there are three
relays, providing complete control of the compressor, fan and defrost management functions. The three 8, 5 and 5A resistive relays
have been built into a very compact case in the versions which also feature the 230V or 115V power transformer, and without
compromising the performance or the reliability of the product.
•
There are two probe inputs for control (AMB. T.) and for defrost (DEF. T.).
•
There are three outputs: the 8A resistive compressor relay, defrost, and 5A resistive for the fans.
•
All versions have removable terminals (
7RS) and 115Vac and 230Vac power supply.