DE-STA-CO F5-B AC Inverter Drive - Manual (Page 23)

23
U
V
W
PB
L3
N/L2
X1A
T1
T2
--
L1
++
PA
PB
OH1
OH2
U
= 90°C
Braking resistor connection with high temp disconnect feature
• The resistor has a NC
mechanical switch type
temperature sensor.
• If the resistor becomes too
hot, the sensor switch
opens and disconnects the
COMBIVERT F5 from the
supply voltage.
• In the event of a complete
failure of the internal
braking transistor, this is
the only way to disconnect
the resistor from the power
source!
120 or 24 V AC/DC
Installation and Connection
U
V
W
PB
L3
N/L2
X1A
T1
T2
--
L1
++
= 90°C
(180°C)*
twisted wires
Braking resistors can develop very high surface
temperatures, therefore install away from other
devices, above the motor control and where people
can not inadvertently come in contact with it.
* The panel mount breaking resistors listed on page 22 have a NC thermal contact rated
at 180°C/356°F. Back mount resistors have a thermal contact rated at 90°C/194°F.
Braking resistor connection with high temperature drive fault
• The resistor has a PTC type sensor and is connected to the
T1, T2 ter minal on the COMBIVERT F5. If a motor
temperature sensor and braking resistor sensor is used they
should be placed in series. Note: if the braking transistor in
the unit fails, there is no guarantee the voltage to the resistor
will be shut off!
3.4.3 Connection