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MIW-ECH-8-DM-EN-000 - 22 / 08 / 2022
7 - 10
ECH-8-DM
CONTROLLER FOR WATER
HEATERS / COOLERS WITH EC FAN
Fig. 3 Wiring and connections
2 4
3
1
1
1 - Terminal
block
L
N PE PE N L1
TEMP Ao GND A /B
Supply v
oltage
(Us)
Unregulated
output
L
N PE PE N L1
TEMP Ao GND A /B
Temper
ature
sensor PT500
Analogue output
Modbus R
TU
communication
2 - Analogue
output range
selection
Jumper removed (default) - 0-6 VDC
Jumper installed - 0-10 VDC
3 - Temperature
mode
selection
Jumper removed (default) - heating
Jumper installed - cooling
4 - PROG header
1 2 3 4 5
Put a jumper onto pins 1 and 2 and wait
for at least 5 seconds to reset the Modbus
communication parameters
1 2 3 4 5
Put a jumper onto pins 3 and 4 and restart the
supply to enter bootloader mode
4.
Tighten the cable glands.
5.
Close the cover and secure it with the screws.
ATTENTION
A safety isolator / disconnect switch should be installed on the mains electricity
side of all motor drives.