Danfoss ECL Comfort 296 Service Manual

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

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Danfoss ECL Comfort 296 Service Manual Manual pdf 5 page image

© Danfoss | 2017.06 | 5VI.LV.H1.02Service guide ECL 296 / ECL 310 Modbus5. Grounding arrangements (to improve “general electrical safety”and “communication quality”) - the common signal (ref. GND)must be connected directly to the protective ground (PE=Earth), at the master device (ONE POINT ONLY).6. Cables shield arrangements (to improve “general electricalsafety”) - One end of each cable’s shield must be connected toprotective ground (PE= Earth). Do not connect both ends of theshield to PE as it forms an unwanted “group loop”.6.0 Installation class and surge / lightning protection“To secure the Modbus electronics (ECL 296 / 310, repeater…) fromsurge / lightning in the network, “external protection devices” mustbe selected based on the installation class of the network” and rightlyinstalled in “each site”.Installation class 4 definitions:Electrical environment where the interconnections are running asoutdoor cables along with power cables, and cables are used forboth electronic and electrical circuits.“Surge protector requirements” for “installation class 4” (Modbusnetwork with ECLs):Parameter Surge protection requirement PT 3-PB-ST and PT 1X2+F-BEClass 4 - surge voltage: network:1,2uS/50uS4KV 10KV (8uS/20uSec)Short circuit current (42 ohm impedance) Much higher than 95,2A 10KA. (Seems to be 2 ohm impedancetester)Maximum continious voltage - core tocore (A, B and ref. GND in ECL)> 3,5V and ≤ 7V 5,2VdcOutput voltage limitation at 1 kV/μs(core-core) spikeOutput voltage limitation at 1 kV/μs(core-earth) spikeMuch less than 1KV ≤ 700V.Note: “common signal” MUST NOT beshorted with “PE (protective earth)” insurge protector base part≤ 55V≤ 700VOutput voltage limitation at 1 kV/μs(core-core) staticMuch less than 1KV ≤ 15VOutput voltage limitation at 1 kV/μs(core-earth) staticMuch less than 1KV ≤ 30VAs per the above details, “PT 3-PB-ST and PT 1X2+F-BE” fromPhoenix meet the requirements. Similar products from other sup-pliers can also be used.Installation guide:• Outer field cables (both IN and OUT field cable wires) mustbe connected to the “unprotected side” of the “external surgeprotection device)• Indoor local cables (both IN and OUT cable wires - which arewell separated from mains supply wires) used to connect com-mination part of electronics (repeater / ECLs) to the network,must be connected to the “protected side” of the “externalsurge protection device)