17
9. WIRING DIAGRAM
•
Make sure that the mains supply to the unit is disconnected before performing any installation, service, maintance or electrical work!
•
The installation and service of the unit and complete ventilation system must be performed by an authorized installer and in
accordance with local rules and regulations.
•
Fan must be earthed.
POTENTIOMETER
L3
L2
L1
400 Vac
3 ph.
50/60 Hz
COIL
230V
SWITCH
230V
+
U
-
CTRL - A
EXTERNAL CONTACTOR
(NOT SUPPLIED)
9.1 CTRL-A (accessory on request)
GND
+10Vout
GND
Vin 2
Vin 1
COMMON
IN 4A
IN 3A
IN 2A
IN 1A
NO
NC
COM
L3
L2
L1
PT01
PT02
MODBUS A
MODBUS B
GND-iso
485 +
485 -
WARNING: regardless of the control system in place (potentiometer or ModBus), it’s strongly recommended to wire
the ModBus communication line and make it accessible from ground level, in order to ease troubleshooting via
ModBus anytime after the installation.
Summary of Contents for MHS
Page 1: ...Manuale Specifico 2 Specific Manual 12 IT EN MHS ...
Page 22: ...22 ...
Page 23: ...23 ...
