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2.5.4 Electrical connections, Pt 1000 temperature sensors and signals
See also the Installation Guide (delivered with the application key)
for application specific connections.
Sensor
Description
Recommended type
S1
Outdoor temperature sensor* ESMT
S2
Room temperature sensor **
Alternative: ECA 30 / 31
ESM-10
S3
Flow temperature sensor***
ESM-11 / ESMB /
ESMC / ESMU
S4
A230.1, A230.2: Supply
temperature sensor, for
monitoring
A230.4: DHW temperature
sensor, for monitoring
ESM-11 / ESMB /
ESMC / ESMU
S5
Return temperature sensor
ESM-11 / ESMB /
ESMC / ESMU
S6
A230.2: Return temperature
sensor, for monitoring
A230.4: DHW circulation
return temperature sensor, for
monitoring
ESM-11 / ESMB /
ESMC / ESMU
S7
Flow / energy meter (pulse
signal)
S8
A230.2: Desired cooling
temperature, 0 - 10 V
A230.4: Pressure transmitter,
0 - 10 V. Alternatively, desired
heating temperature, 0 - 10 V
*
A230.1, A230.4: 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 room temperature sensor connection. The room
temperature signal can also be available from a Remote
Control Unit (ECA 30 / 31). See the Installation Guide
(delivered with the application key) for specific connections.
***
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).
Wire cross section for sensor connections: Min. 0.4 mm².
Total cable length: Max. 200 m (all sensors incl. internal ECL 485
communication bus).
Cable lengths of more than 200 m may cause noise sensibility (EMC).
Connection of flow / energy meter with pulse signal
See the Installation Guide (delivered with the application key).
The output of the flow / energy meter can be equipped with an
external pull-up resistor if an internal pull-up resistor is not present.
VI.LG.H4.02
© Danfoss | 2017.05 | 21
Operating Guide ECL Comfort 210/296/310, application A230