Connection of stand-alone option units
58
Connection example with the FR-BR-(H) resistor unit
NOTE
• Do not remove the jumper across terminals P/+ and P1.
Connection example with the MT-BR5 type resistor unit
After wiring securely, set
Pr.30 Regenerative function selection
= "0".
Set
Pr.0 Brake mode selection
= "2" in the brake unit FR-BU2.
NOTE
• The stall prevention (overvoltage), oL, does not occur while
Pr.30 Regenerative function selection
= "0". (Refer to the FR-
F800 Instruction Manual (Detailed).)
When wiring, make sure to match the terminal symbol (P/+, N/-) at the inverter side and at the brake unit
(FR-BU2) side. (Incorrect connection will damage the inverter and brake unit.)
Install a stepdown transformer.
The wiring distance between the inverter and brake unit (FR-BU2), and between the brake unit (FR-BU2)
and resistor unit (FR-BR) must be within 5 m. Even when the wires are twisted, the cable length must be
within 10 m.
The contact between TH1 and TH2 is closed in the normal status and is open at a fault.
When wiring, make sure to match the terminal symbol (P/+, N/-) at the inverter side and at the brake unit
(FR-BU2) side. (Incorrect connection will damage the inverter and brake unit.)
Install a stepdown transformer.
The wiring distance between the inverter and brake unit (FR-BU2), and between the brake unit (FR-BU2)
and resistor unit (MT-BR5) must be within 5 m. Even when the wire is twisted, the cable length must be
within 10 m.
The contact between TH1 and TH2 is open in the normal status and is closed at a fault.
The CN8 connector used with the MT-BU5 type brake unit is not used.
U
V
W
P/+
N/-
R/L1
S/L2
T/L3
Motor
M
Inverter
PR
N/-
BUE
SD
P/+
P
A
B
C
FR-BU2
FR-BR
TH2
TH1
PR
Three phase AC
power supply
MCCB
MC
OFF
ON
MC
T
∗2
∗1
10 m or less
MC
∗3
∗3
∗4
MC
R/L1
Motor
M
Inverter
S/L2
T/L3
U
V
P/+
N/-
P
PR
10 m
or less
W
Three phase
AC power
supply
MCCB
TH1
TH2
MC
CR1
OFF
ON
MC
CR1
Τ
∗2
∗3
∗1
∗3
∗5
∗4
P
N
BUE
SD
P
PR
Brake unit
FR-BU2
Resistor unit
MT-BR5
A
B
C
