EVCO EVB1256N9 User Manual
Page 85
EVCO S.p.A.
EVBOX1 | Installation guide ver. 1.2 | Code 144BOX1E124
page 85 of 88
Analogue inputs
according to model, up to 5 inputs:
-
3 configurable via configuration parameter for OTC
or NTC probes (room temperature, evaporator
temperature and evaporation temperature)
-
1 configurable via configuration parameter for PTC
or NTC probes (configurable via configuration
parameter for condenser temperature, critical
temperature, evaporator 2 temperature or CPT
temperature)
-
1 for 4-20 mA transducers (vapour pressure).
4-20 mA transducers power supply: 12 DC (+50 %, -25 %),
120 mA max.
Analogue inputs PTC (990 @ 25 °C, 77 °F)
Type of sensor:
KTY 81-121.
Measurement field:
from -50 to 150 °C (from -58 to 302
°F).
Precision:
±0,5 % of scale end.
Resolution :
0,1 °C (1 °F).
Conversion time:
100 ms.
Protection:
none.
Analogue inputs NTC (10 K @ 25 °C, 77 °F)
Type of sensor:
ß3435.
Measurement field:
from -50 to 120 °C (from -58 to 248
°F).
Precision:
±0,5 % of scale end.
Resolution :
0,1 °C (1 °F).
Conversion time:
100 ms.
Protection:
none.
Analogue inputs 4-20 mA
Input resistance:
≤ 200 .
Precision:
±0,5 % of scale end.
Resolution :
0.01 mA.
Conversion time:
100 ms.
Protection:
none; maximum allowable current
at each input is 25 mA.
Digital inputs:
3 inputs, configurable via configuration parameter for NA or NC
contact (micro port, multifunction 1 and multifunction 2)
Digital inputs at 5 VDC mA (clean contact)
Power:
none.
Protection:
none.
Displays:
custom 3 digit display with decimal point and function icon.