Danfoss ECL Comfort A260 Service Guide

© Danfoss | 2017.06 | 3
VI.LV.H1.02
Service guide ECL 296 / ECL 310 Modbus
4.0 Modbus network denitions
4.1 Multipoint serial bus infrastructure
The below drawing gives a general overview of the serial bus
infrastructure in a Modbus multipoint serial line system.
1) = surge protector 2) = repeater
The following conventions are adopted in the gure above:
1. The interface with the trunk is named ITr (Trunk Interface)
2. The interface between the device (ECL 296 / 310) and the
Passive Tap ( surge protector) is named IDv (Derivation
Interface)
3. The interface between the device (ECL 296 / 310) and the
Active Tap (repeater) is named AUI (Attachment Unit Interface)
4. LT = line termination. Resistor: 120 ohm , 0,5 W or 150 ohm,
0,5 W
A multipoint Modbus serial line bus is made of a principal cable
(the trunk) and possibly some derivation cables.
Line terminations are necessary at each extremity of the trunk
cable for impedance adaptation.

Danfoss ECL Comfort A260 Specifications

General

Brand	Danfoss
Model	ECL Comfort A260
Category	Controller
Language	English