Installation Guide
ECL Comfort 310, application A376
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
Type
(recomm.)
30
Common terminal
31*
+12 V*, ECL 485 communication bus
32
A, ECL 485 communication bus
33
B, ECL 485 communication bus
Cable 2 x
twisted pair
* Only for ECA 30 / 31 and master / slave communication
D
a
n
fo
s
s
8
7
H
2
0
5
2
.1
0
A
A
B
B
A
A
B
B
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).
40
DEN-SMT/DK
VI.GU.B1.02
Danfoss District Energy
