24
ENG
“EVD evolution” +030222041 - rel. 1.0 - 01.06.2008
FUNCTIONS
6.
Inputs and outputs
6.1
Analogue inputs
The parameters in question concern the choice of the type of pressure
sensor S1 and S3 and the choice of the temperature sensor S2 and
S4, as well as the possibility to calibrate the pressure and temperature
signals. As regards the choice of pressure sensor S1, see the chapter on
“Commissioning”.
Inputs S2, S4
The options are standard NTC sensors, high temperature NTC, combined
temperature and pressure sensors and 0 to 10 Vdc input. For S4 the 0
to 10 Vdc input is not available. When choosing the type of sensor,
the minimum and maximum alarm values are automatically set. See
the chapter on “Alarms”. The auxiliary sensor S4 is associated with the
Modulating thermostat function or can be used as a backup sensor for
the main sensor S2.
Type
CAREL code
Range
CAREL NTC (10KΩ at 25°C)
NTC0**HP00
NTC0**WF00
NTC0**HF00
-50T105°C
CAREL NTC-HT HT (50KΩ at 25°C) NTC0**HT00
0T120°C
(150 °C per 3000 h)
Combined NTC
SPKP**T0
-40T120°C
Attention: in case of combined
NTC sensor, select also the
parameter relevant to the corresponding ratiometric pressure sensor.
Parameter/description
Def.
CONFIGURATION
Sensor S2:
CAREL NTC; CAREL NTC-HT high T; Combined NTC SPKP**T0;
0-10 V external signal
CAREL NTC
Sensor S4:
CAREL NTC; CAREL NTC-HT high T; Combined NTC SPKP**T0
CAREL NTC
Tab. 6.a
Input S3
The auxiliary sensor S3 is associated with the high condensing
temperature protection or can be used as a backup sensor for the main
sensor S1. If the sensor being used is not included in the list, select any
0 to 5 V ratiometric or electronic 4 to 20 mA sensor and then manually
modify the minimum and maximum measurement in the manufacturer
parameters corresponding to the sensors.
Important:
sensors S3 and S4 appear as NOT USED if the “auxiliary
control” parameter is set as “ disabled”.
If “auxiliary control” has any other setting, the manufacturer setting for the
sensor used will be shown, which can be selected according to the type.
Auxiliary control
Variable displayed
High condensing temperature protection
S3
Modulating thermostat
S4
Backup sensors
S3,S4
Tab. 6.b
Parameter/description
Def.
Configuration
Sensor S3:
Ratiom.: -1 to
9.3 barg
Ratiometric (OUT=0 to 5 V) Electronic (OUT=4 to 20 mA)
-1 to 4.2 barg
-0.4 to 9.2 barg
-1 to 9.3 barg
0 to 17.3 barg
-0.4 to 34.2 barg
0 to 34.5 barg
0 to 45 barg
-0.5 to 7 barg
0 to 10 barg
0 to 18.2 bar
0 to 25 barg
0 to 30 barg
0 to 44.8 barg
remote, -0.5 to 7 barg
remote, 0 to 10 barg
remote, 0 to 18.2 barg
remote, 0 to 25 barg
remote, 0 to 30 barg
remote, 0 to 44.8 barg
Tab. 6.c
Calibrating pressure sensors S1, S3 and temperature
sensors S2 and S4 (offset and gain parameters)
In case it is necessary to make a calibration:
of the pressure sensor, S1 and/or S3 it is possible to use the offeset
•
parameter, which represents a constant that is added to the signal
across the entire range of measurement, and can be expressed in
barg/psig. If the 4 to 20 mA signal coming from an external controller
on input S1 needs to be calibrated, both the offset and the gain
parameters can be used, the latter which modifies the gradient of the
line in the field from 4 to 20 mA.
of the temperature sensor, S2 and/or S4 it is possible to use the offset
•
parameter, which represents a constant that is added to the signal
across the entire range of measurement, and can be expressed in °C/°F.
If the 0 to 10 Vdc signal coming from an external controller on input
S2 needs to be calibrated, both the offset and the gain parameters can
be used, the latter which modifies the gradient of the line in the field
from 0 to 10 Vdc.
4
20
A
B
mA
0
10
A
B
Vdc
Fig. 6.a
Key:
A= offset,
B= gain
Parameter/description
Def.
Min.
Max.
UOM
Sonde
S1: calibration offset
0
-60 (-870),
-60
60 (870),
60
barg (psig),
mA
S1: calibration gain, 4 to 20 mA
1
-20
20
-
S2: calibration offset
0
-20 (-290),
20
20 (290),
20
°C (°F), volt
S2: calibration gain, 0 to 10 V
1
-20
20
-
S3: calibration offset
0
-60 (-870)
60 (870) barg (psig)
S4: calibration offset
0
-20 (-36)
20 (36)
°C (°F)
Tab. 6.d
Digital inputs
Digital input DI1 is used to activate the control:
digital input 1 closed: control activated;
•
digital input 1 open: driver in standby (see paragraph “Control status”).
•
As regards digital input 2, if configured, this is used to tell the driver the
active defrost status:
Defrost active= contact DI2 closed.
When entering Manufacturer programming mode, the start delay after
defrost can be set (see the following paragraphs).
Parameter/description
Def.
Min.
Max. UOM
Configuration
Configuration of DI2
Disabled; Optimise valve control after
defrost.
Disabled
-
-
-
Control
Start delay after defrost
10
0
60
min
Tab. 6.e
