User`s guide

173
CHAPTER 8 - CFW-08 OPTIONS AND ACCESSORIES
Figure 8.31
- Braking resistor connection
(only for models 7.3-10-16 A/200-240 V and 2.7-4.3-6.5-10-13-16 A/380-480 V)
8.24
SERIAL
COMMUNICATION
8.24.1
Introduction
MOTOR
POWER
SUPPLY
CONTACTOR
CONTROL
POWER
SUPPLY
OVERLOAD
RELAY
THERMOSTAT
BRAKING
RESISTOR
U
V
W
R
S
T
BR
+UD
Thebasic objectiveof theserial communication is thephysical
connection ofthe inverters inanequipmentnetworkconfigured
as follows:
DANGER!
The internal inverter braking circuit and the braking resistor
can be damaged when not correctly sized or when the line
voltage exceeds the maximum allowed value.
In this case, the onlyguaranteed method to avoid burning the
braking resistor and eliminate risk of fire is the installation of a
thermal overload relay in series connected with the resistor
and/or the installation of a thermostat on the resistor body,
wiring it in such a way that it disconnects the inverter power
supply in case of overheating, as shown in figure 8.31:
Master
PC, PLC,
etc.
Slave 1
(Inverter)
Slave 2
(Inverter)
Slave n
(Inverter)
n

30