Danfoss ECL Comfort 210 Operating Manual page 31

Operating Guide
Connection of voltage signal (0–10 V) for external control of
desired flow temperature
Connection of flow meter
See the Mounting Guide (delivered with the application key).
Danfoss District Energy
ECL Comfort 210 / 310, application A247 / A347
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).
VI.LG.S3.02
ECL 310
DEN-SMT/DK 31