Connection of stand-alone option units
Installation and wiring
2 - 92
2.10.2
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.
Be sure to remove the jumper across terminals PR and PX when using the FR-BU2 with the inverter
of FR-A820-00490(7.5K) or lower, FR-A840-00250(7.5K) or lower.
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
Fig. 2-63:
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. 2-47:
Recommended external thermal relay
NOTES
Set "1" in Pr. 0 "Brake mode selection" of the FR-BU2 to use a GRZG type discharging resistor.
Do not remove the jumper across terminals P/+ and P1 except when connecting a DC reactor
(FR-HEL).
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
PR
PX
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
Summary of Contents for FR-A820-00046 (0.4K)
Page 2: ......
Page 4: ......
Page 144: ...System configuration for Ethernet communication FR A800 E Installation and wiring 2 114 ...
Page 202: ...Basic operation procedure JOG operation Basic operation 4 32 ...
Page 1090: ...Check first when you have a trouble Protective functions 6 50 ...
Page 1189: ...Appendix EC Declarations of Conformity FR A800 A 49 ...
Page 1190: ...EC Declarations of Conformity Appendix A 50 ...
Page 1191: ...Appendix EC Declarations of Conformity FR A800 A 51 ...
Page 1192: ...EC Declarations of Conformity Appendix A 52 ...
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Page 1194: ...EC Declarations of Conformity Appendix A 54 ...
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Page 1203: ...Appendix EC Declarations of Conformity FR A800 A 63 ...
Page 1204: ...EC Declarations of Conformity Appendix A 64 ...
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Page 1206: ...EC Declarations of Conformity Appendix A 66 ...
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Page 1208: ...EC Declarations of Conformity Appendix A 68 ...
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Page 1210: ...EC Declarations of Conformity Appendix A 70 ...
Page 1211: ...Appendix EC Declarations of Conformity FR A800 A 71 ...
Page 1212: ...EC Declarations of Conformity Appendix A 72 A 7 2 FR A846 series ...
Page 1213: ...Appendix EC Declarations of Conformity FR A800 A 73 ...
Page 1214: ...EC Declarations of Conformity Appendix A 74 ...
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