Danfoss ECL Comfort 296 Service Manual

Also see for ECL Comfort 310: Installation guide Installation guide Installation guide Installation guide Mounting guide

Contents

Danfoss ECL Comfort 296 Service Manual Manual pdf 2 page image

2 | © Danfoss| 2017.06VI.LV.H1.02Service guide ECL 296 / ECL 310 Modbus2.0 IntroductionIn smaller district heating networks ligthning can be a challenge forthe connected devices like ECL Comfort 296 / ECL 310 controllers.If not protected, Modbus interfaces are subject for being burned incase of lightning.Based on several market inputs and analysis we identified a need forinformation.This has resulted in the present service guide which includesrecommendations for new installations.The document is prepared in compliance with www.modbus.org3.0 Conclusion1. Each nodes in the “Modbus network” (central heating station,repeater station or individual house) are highly recommendedto have “surge protector”. It must be selected as per section 6and installed as described in section 7.2. Phoenix “PT 1X2+F-BE” (or similar products from another manu-facturer, as per the surge protection requirement in section 6)must be used instead of “PT 1X2-BE” in individual house installa-tions. Refer section 8.3. Recommendation on Modbus reference common signal con-nection, shield connection, termination resistor connection maybe referred in section 5, 6, 7 and 8.