
4 Configuration and Wiring
4 - 76
AC Servomotors/Servo Drives 1S-series with Built-in EtherCAT® Communications User’s Manual (I586)
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 3-127 for details on the specifications.
Characteristics
External Regeneration Resistor
R88A-RR120
, R88A-RR300
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-RR30002R5
2.5
Ω
60 W
R88A-RR30004
4
Ω
R88A-RR30005R4
5.4
Ω
R88A-RR30010
10
Ω
R88A-RR30015
15
Ω
R88A-RR30016
16
Ω
R88A-RR30017
17
Ω
R88A-RR30020
20
Ω
R88A-RR30025
25
Ω
R88A-RR30033
33
Ω
Summary of Contents for R88D-1SN ECT Series
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