Danfoss ECL Comfort 310 Operating Manual page 22

Operating Guide
2.3.3 Mounting the internal I/O module ECA 32 or ECA 35
The ECA 32 module (order code no. 087H3202) or ECA 35 module
(order code no. 087H3205) can be inserted into the ECL Comfort
310 / 310B base part for additional input and output signals in
relevant applications.
22 DEN-SMT/DK
ECL Comfort 310, application P318
ECA 32
ECA 35
VI.JM.Q3.02
Danfoss District Energy