Danfoss ECL Comfort 210 Operating Manual page 24

Operating Guide ECL Comfort 210 / 310, application A231 / A331
Connection of a pressure transmitter with 4-20 mA output
The 4-20 mA signal is converted to a 2-10 V signal by means of the
500 ohm resistor.
Connection of a pressure switch
A331.1 / A331.2:
Sensor Description
S1 Outdoor temperature
sensor*
S2
Supply flow temperature
sensor**
S3 Flow temperature sensor*** ESM-11 / ESMB /
S5 Return temperature sensor
S7
Differential pressure switch
S8 Pressure transmitter
(0–10 V or 4–20 mA)
or pressure switch
S9
Alarm switch
S10 Pressure transmitter
(0–10 V or 4–20 mA)
or pressure switch
* If the outdoor temperature sensor is not connected or the
cable is short-circuited, the controller assumes that the
outdoor temperature is 0 (zero) °C.
** Only for application A331.2.
*** The flow temperature sensor must always be connected
in order to have the desired functionality. If the sensor is
not connected or the cable is short-circuited, the motorized
control valve closes (safety function).
24 | © Danfoss | 2017.11
Recommended type
ESMT
ESM-11 / ESMB /
ESMC / ESMU
ESMC / ESMU
ESM-11 / ESMB /
ESMC / ESMU
VI.LG.P2.02