YASKAWA Varispeed E7 Instruction Manual And Parameter Description page 55

To prevent the braking unit/braking resistor unit from overheating, design the control circuit to turn OFF the
inverter output using the thermal overload relay contacts of the Unit as shown in
200 V and 400 V Class Inverters with 0.4 to 18.5 kW Output Capacity
Inverter
200 V and 400 V Class Inverters with 22 kW or higher Output
Connecting Braking Units in Parallel
When connecting two or more Braking Units in parallel, use the wiring and jumper settings like shown in
2.8. There is a jumper for selecting whether each Braking Unit is to be a master or slave. Select "Master" for
the first Braking Unit only, and select "Slave" for all other Braking Units (i.e., from the second Unit onwards).
Inverter
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CDBR Braking
Unit
1
Thermal overload
relay trip contact
CDBR Braking
Unit
Inverter
Thermal overload
relay trip contact
Fig 2.7 Connecting the Braking Resistor Unit and Braking Unit
Thermal overload relay contact
Braking Unit #1
Thermal overload relay
contact
Fig 2.8 Connecting Braking Units in Parallel
LKEB Braking
Resistor Unit
LKEB
Resistor Unit
Thermal overload relay contact
Braking
Resistor
Unit
Braking Unit #2
Thermal overload relay
contact
Fig 2.7.
Thermal protector
trip contact
Braking
Thermal protector
trip contact
Thermal overload relay contact
Braking
Resistor
Unit
Braking Unit #3
Thermal overload relay
contact
Fig
Braking
Resistor
Unit