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4 Configuration and Wiring
AC Servomotors/Servo Drives 1S-series with Built-in EtherCAT® Communications User’s Manual (I586)
4-4 R
egen
erative En
ergy Ab
sorp
tion
4
4-
4-3 R
egenera
tive Energy Absorption by an
External Reg
eneration Resist
a
nce D
evice
If the regenerative power exceeds the average regenerative power that the Internal Regeneration
Resistor of the Servo Drive can absorb, connect an External Regeneration Resistance Device.
Connect the External Regeneration Resistance Device between B1 and B2 terminals on the Servo
Drive.
Double-check the terminal names when you connect the resistor because the Servo Drive may be dam-
aged if the resistor is connected to the wrong terminals.
The surface of the External Regeneration Resistance Device will heat up to approximately 200°C. Do
not place it near equipment and wiring that is easily affected by heat.
3-5 Specifications of External Regeneration Resistors and External Regeneration Resistance
on page 3-93 for details on the specifications.
z
Characteristics
External Regeneration Resistor
R88A-RR120
and R88A-RR300
External Regeneration Resistance Unit
R88A-RR1K6
4-4-3
Regenerative Energy Absorption by an External Regeneration
Resistance Device
External Regeneration Resistor
Model
Resistance value
Power to be
absorbed for
120
°C
tempera-
ture rise
Heat radiation
specification
Heat radiation
condition
R88A-RR12015
15
Ω
24 W
Natural cooling
Aluminum
350 mm × 350 mm
Thickness: 3.0 mm
R88A-RR12025
25
Ω
R88A-RR30010
10
Ω
60 W
R88A-RR30012
12
Ω
R88A-RR30015
15
Ω
R88A-RR30017
17
Ω
R88A-RR30020
20
Ω
R88A-RR30025
25
Ω
R88A-RR30033
33
Ω
Model
Resistance value
Power to be
absorbed for
120
°
C tempera-
ture rise
Heat radiation
specification
R88A-RR1K610
10
Ω
640 W
Forced cooling by
the fan
R88A-RR1K617
17
Ω
R88A-RR1K620
20
Ω
R88A-RR1K640
40
Ω
R88A-RR1K666
66
Ω
Summary of Contents for R88D-1SN01H-ECT
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