Rev. 1 - 05/10/2021
OPERATING MANUAL
OPERATING MANUAL
EN
EN
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The motor is protected through one or more Thermal Protectors. If the motor temperature is too high, the
thermal protector opens one phase and the driver recognizes the error and stops the fan (see chapter 18).
14.2 Motor overheating: THERMAL PROTECTOR
The Motor Winding temperature and the driver derating are dependent on the fan size and on the fan
working point. Therefore, it is possible that the fan could work at 50°C without a performance limitation.
The Driver and motor areas are rated for operating in a temperature range between -20°C and +40°C. The derating
is tested and guaranteed from +40°C to +50°C.
Higher temperatures could damage the motor winding or the performance could be significantly reduced.
WARNING
WARNING
15. MASTER & SLAVE MODE
This single-phase driver has a tachometric output ranging from 0 to 5V and a special configuration must be
set on the slave fan for a Master&Slave connection. It is possible to drive two fans in a master and slave con-
figuration by setting the MASTER in any preferred mode and the SLAVE in Master&Slave mode only.
The SLAVE operating mode must be changed (
INPUT TYPE = 3).
The MASTER must have the
Holding Register 46 set at 0 = TACHO.
15.1 Master and Slave 0-5V PWM out (for 1.05 kW 1-phase only)
A Master & Slave connection is necessary when the fans have to operate in parallel and in any Constant-Airflow mode, or under
control of the internal PID regulator. Having two or more fans self-controlling independently, while operating in parallel, can make
the system unstable. A Master & Slave connection is neither needed nor recommended when the fans in parallel are runnig in any
speed-control mode, even if under control of a common external PID regulator.
GND
GND
IN
IN
+10
+10
GND
GND
B
B
A
A
OUT
OUT
MASTER
SLAVE
TACHO /
A
LARM / FIL
TER
TACHO /
A
LARM / FIL
TER
GN
D
GN
D
MODBUS -B
MODBUS -B
MODBUS -A
MODBUS -A
GN
D
GN
D
TRANSUCER INPU
T
TRANSUCER INPU
T
ANALOG INPU
T
ANALOG INPU
T
ENABL
E
ENABL
E
+10V
+10V
+24V
+24V
MASTER
SLAVE
The 2.1 kW drivers and the 3-phase ones can be connected in master & slave mode more easily. These drivers
have a tachometric output ranging from 0 to 10 V.
The master can have any possible configuration, while the slave must be configured in Analog Speed Control only.
The MASTER must have the
Holding Register 46 set at 0 = TACHO.
15.2 Master and Slave 0-10V PWM out (for other drivers)