Danfoss ECL Comfort 210 Operating Manual page 25

Operating Guide ECL Comfort 210/296/310, application A237/A337
Connection of voltage signal (0–10 V) for external control of
desired flow temperature
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.
Connection of switch for external override
VI.LG.R3.02
Pulse based signal for flow / power, applied to input S7
For monitoring:
Frequency range is 0.01 - 200 Hz
For limitation:
Minimum frequency is recommended to be 1 Hz in order to have a
stable control. Furthermore, the pulses must appear regularly.
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).
© Danfoss | 2017.05 | 25