Omron VARISPEED L7 Manual page 47

Connecting Braking Units in Parallel
When two or more Braking Units are connected in parallel the wiring and jumper settings must be done like
shown in
ter" must be set for the first Braking Unit only, "Slave" must be set for all other Braking Units (i.e. from the
second Unit onwards).
2
Inverter
Control Power Supply Connection
The controller of the Varispeed L7 can be supplied by an external voltage source during rescue operation using
the twisted wires marked with P0 and N0. Upon shipment the wires are connected to the main circuit terminal
B1 (units up to 18.5 kW) or terminal +3 (units from 22 kW and above) and terminal -.
Please refer to
16
2-
Fig 2.8. There is a jumper for selecting whether each Braking Unit is to be a master or slave. "Mas-
Thermal overload relay contact
Braking Unit #1
Thermal overload relay
contact
Fig 2.8 Connecting Braking Units in Parallel
B2
B1 / + 3
R/L1
L1
S/L2
L2
T/L3
L3
-
P0
N0
Fig 2.9 Control Power Supply Connection
page 6-77, Rescue System
Thermal overload relay contact
Braking
Resistor
Braking Unit #2
Thermal overload relay
contact
Control
Power Supply
circuit
for details about rescue operation.
Thermal overload
relay contact
Braking
Braking
Resistor
Resistor
Braking Unit #3
Thermal overload relay
contact
U/T1
V/T2
W/T3