© Danfoss |2017.06
VI.LV.H1.02 | 1
ECL Comfort 296 / 310 controllers
Modbus networking guide
Service Guide
1.0 Contents
1.0 Contents... . ................................................................................................................................................................................................................................................1
2.0 Introduction .............................................................................................................................................................................................................................................2
3.0 Conclusion ... .............................................................................................................................................................................................................................................2
4.0 Modbus network definitions .............................................................................................................................................................................................................3
4.1 Multipoint serial bus infrastructure .......................................................................................................................................................................................3
5.0 ECL 296 / 310 Modbus network specification .............................................................................................................................................................................4
6.0 Installation class and surge / lightning protection ....................................................................................................................................................................5
7.0 Annexure A: Modbus network wiring guidelines ......................................................................................................................................................................6
7.1 Central heating station ................................................................................................................................................................................................................7
7.2 Repeater stations (individual houses with repeater) .......................................................................................................................................................8
7.3 Individual houses (without repeater) ....................................................................................................................................................................................9
8.0 Annexure B ............................................................................................................................................................................................................................................ 10
8.1 Selection of parts ........................................................................................................................................................................................................................10
8.2 Surge protector wiring..............................................................................................................................................................................................................11
8.3 “Modbus” to “mains” separation ...........................................................................................................................................................................................12
