Danfoss ECL Comfort 210 Installation Manual page 21

Installation Guide
2.5.6 Electrical connections, master / slave systems
The controller can be used as master or slave in master / slave
systems via the internal ECL 485 communication bus (2 x twisted
pair cable).
The ECL 485 communication bus is not compatible with the ECL
bus in ECL Comfort 110, 200, 300 and 301!
Terminal Description
30
Common terminal
31*
+12 V*, ECL 485 communication bus
32 B, ECL 485 communication bus
33 A, ECL 485 communication bus
* Only for ECA 30 / 31 and master / slave communication
2.5.7 Electrical connections, communication
Electrical connections, Modbus
ECL Comfort 210: Non-galvanic isolated Modbus connections
ECL Comfort 310: Galvanic isolated Modbus connections
Danfoss District Energy
ECL Comfort 210 / 310, application A260
Type
(recomm.)
Cable 2 x
twisted pair
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.F2.02 DEN-SMT/DK 21