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Installation and wiring
Connection of stand-alone option units
FR-F800
2 - 71
2.8
Connection of stand-alone option units
The inverter accepts a variety of stand-alone option units as required. Incorrect connection will cause
inverter damage or accident. Connect and operate the option unit carefully in accordance with the
corresponding option unit manual.
2.8.1
Connection of the brake unit (FR-BU2)
Connect the brake unit (FR-BU2(H)) as shown below to improve the braking capability during decel-
eration.
Connection example with the GRZG type discharging resistor
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.)
When the power supply is 400 V class, install a stepdown transformer.
The wiring distance between the inverter and brake unit (FR-BU2), and between the brake unit
(FR-BU2) and discharging resistor must be within 5 m each. Even when the wires are twisted, the
cable length must be within 10 m.
It is recommended to install an external thermal relay to prevent overheat of the discharging
resistor.
!
For the connection method of the discharging resistor, refer to the Instruction Manual of the
FR-BU2.
I002408E_B
Fig. 2-48:
Connection example with the GRZG type discharging resistor
Brake unit
Discharging resistor
Recommended
external thermal relay
FR-BU2-1.5K
GZG 300W-50Ω (one)
TH-N20CXHZ 1.3A
FR-BU2-3.7K
GRZG 200-10Ω (three in series)
TH-N20CXHZ 3.6A
FR-BU2-7.5K
GRZG 300-5Ω (four in series)
TH-N20CXHZ 6.6A
FR-BU2-15K
GRZG 400-2Ω (six in series)
TH-N20CXHZ 11A
FR-BU2-H7.5K
GRZG 200-10Ω (six in series)
TH-N20CXHZ 3.6A
FR-BU2-H15K
GRZG 300-5Ω (eight in series)
TH-N20CXHZ 6.6A
FR-BU2-H30K
GRZG 400-2Ω (twelve in series)
TH-N20CXHZ 11A
Tab. 2-34:
Recommended external thermal relay
U
V
W
P/+
N/-
R/L1
S/L2
T/L3
M
PR
N/-
BUE
SD
P/+
A
B
C
FR-BU2
R
R
MCCB
MC
MC
T
MC
OCR
Three-phase AC
power supply
≤
10 m
OFF
ON
OCR
contact
Inverter
External
thermal
relay
!
GRZG type
discharging
resistor
Motor
To the brake unit
terminal P/+
To a resistor
Содержание FR-F820-00046
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Страница 114: ...System configuration for Ethernet communication FR F800 E Installation and wiring 2 86 ...
Страница 172: ...Basic operation procedure JOG operation Basic operation 4 32 ...
Страница 812: ...Inverter to inverter link function FR F800 E Parameters 5 640 ...
Страница 874: ...Measurement of main circuit voltages currents and powers Precautions for maintenance and inspection 7 20 ...
Страница 900: ...Outline dimension drawings Specifications 8 26 ...
Страница 928: ...EC Declarations of Conformity Appendix A 28 A 6 EC Declarations of Conformity A 6 1 FR F820 FR F840 FR F842 series ...
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