Modbus" To "Mains" Separation - Danfoss ECL Comfort 296 Service Manual

Service guide

8.3 "Modbus" to "mains" separation

The surge / lightning protected Modbus cables "must be separated from
mains / switched mains signal" even for a short run. Other signals in
ECL 296 / 310 (M Bus, sensor signals, RS485 signals), which are meant
for indoor wiring, "must be separated from mains / switched mains
signal" even for a short run. Modbus signals may be taken along with
MBus, sensor signal and other RS485 signals.
Recommended:
1) = surge protector
1. Even for a short distance well separated (≥ 7mm) from mains
signal.
2. Mains signal must be grouped separately and clear distance is
maintained throughout the cable routing (from surge protected
signal to ECL 296 / 310 wiring)
12 | © Danfoss| 2017.06
ECL 296 / ECL 310 Modbus
VI.LV.H1.02