Mitsubishi FR-BU2-H30K - Multiple FR-BR(H) Brake Units Connection

22
WIRING
3.5.2 When connecting several brake units to one inverter
*1 Connect the inverter terminals (P/+, N/-) and brake unit (FR-BU2) terminals so that their
terminal names match with each other. (Incorrect connection will damage the inverter and
brake unit.)
Do not remove a jumper across terminal P/+ and P1 except when connecting a DC reactor.
*2 When the power supply is 400V class, install a step-down transformer.
*3 When using the FR-BU2 with the FR-A500, A700 series inverter 7.5K or less or FR-V500
series inverter 5.5K or less, be sure to remove a jumper across terminal PR and PX.
*4 The wiring distance between the inverter, brake unit (FR-BU) and resistor unit (FR-BR)
should be within 5m. Even when the wiring is twisted, the cable length must not exceed
10m.
*5 Normal: across TH1-TH2...close, Alarm: across TH1-TH2...open
*6 When connecting several brake units to one inverter, always connect the master/slave
operation wiring on page 23 in addition to the above connection.
*7 When connecting several FR-BU2 to one inverter, connect P/+ of each FR-BU2 and of the
inverter and N/- respectively. Do not pass wires from terminal P/+ and N/- of the FR-BU2 to
terminals of other FR-BU2.
FR-BR
U
V
W
P/+
N/-
R/L1
S/L2
T/L3
Motor
IM
Inverter
P
FR-BR
TH2
TH1
PR
Three
phase
A
C
power
supply
MCCB MC
MC
OFFON
MC
T
PR
PX
*1
*7
*5
5m or less
*4
*4
P
FR-BR
TH2
TH1
PR
*5
*4
*1
*4
*3
PR
N/-
BUE
SD
P/+
A
B
C
MSG
SD
MSG
SD
FR-BU2
*6
PR
N/-
BUE
SD
P/+
A
B
C
MSG
SD
MSG
SD
FR-BU2
*6
*2