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2
-20
Connecting an optional Braking Resistor Unit (3G3IV-PLKB) and Braking Unit (3G3IV-
PCDBR)
Connect the Braking Resistor Unit and Braking Unit to the Inverter as shown in the Fig 2.13.
To prevent the Unit from overheating, design the sequence to turn OFF the power supply for the thermal over-
load relay trip contacts of the Unit as shown in Fig 2.13.
200 V and 400 V Class Inverters with 0.4 to 18.5 kW Output
200 V and 400 V Class Inverters with 22 kW or higher Output
Fig 2.13 Connecting the Braking Resistor Unit and Braking Unit
IMPORTANT
When using an optional Braking Unit and Braking Resistor Unit, the parameter L3-04 (Stall prevention
selection during deceleration) has to be set to 0. Otherwise stall prevention is enabled and the Braking Unit
will not work.
Inverter
3G3IV-PLKB
Braking Resis-
tor Unit
Thermal overload
relay trip contact
3G3IV-PCD-
BR
Braking
Unit
Thermal protector
trip contact
1
Inverter
3G3IV-PLKB
Braking Resistor
Unit
Thermal overload
relay trip contact
3G3IV-PCD-
BR
Braking
Unit
Thermal protector
trip contact