Danfoss ECL Comfort 310 Installation Manual page 40

Installation Guide
2.5.7 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 A, ECL 485 communication bus
33 B, ECL 485 communication bus
* Only for ECA 30 / 31 and master / slave communication
40 DEN-SMT/DK
ECL Comfort 310, application A376
Type
(recomm.)
Cable 2 x
twisted pair
B
A
B
A
Settings related to master / slave communication:
See 'Several controllers in the same system' in 'Miscellaneous' .
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.GU.B1.02
B
A
B
A
Danfoss District Energy