Chapter 2
2-113
Standard Models and Specifications
2-9 External Regeneration Resistor Specifications
If the Servomotor’s regenerative energy is excessive, connect an External
Regeneration Resistor.
Note 1. External Regeneration Resistors cannot be connected to Servo Drivers of between 30 to
200 W.
Connection to a 400-W Servo Driver is usually not required. If the Servomotor’s regenerative
energy is excessive, connect an External Regeneration Resistor between B1 and B2.
For a 750-W Servo Driver, B2 and B3 are normally short-circuited. If the Servomotor’s re-
generative energy is excessive, remove the short bar between B2 and B3 and connect an
External Regeneration Resistor between B1 and B2.
Note 2. Refer to Surge Absorbers for External Regeneration Resistor selection details.
■ R88A-RR22047S External Regeneration Resistor
■ Specifications
■ External Dimensions
All dimensions are in millimeters.
● R88A-RR22047S External Regeneration Resistor
Model Resistance Nominal
capacity
Regeneration
absorption for 120
°C
temperature rise
Heat radiation
condition
Thermal switch
output
specifications
R88A-RR22047S 47
Ω ± 5% 220 W 70 W t1.0 × @350
(SPCC)
Operating tem-
perature:
170
°C±3%, NC
contact
Rated output: 3 A
Thermal switch output
20
t1.2 200
220
230
62
48
4.2
6
500
1.5 dia.
(0.3mm
2
)
3 dia.
(0.75mm
2
)
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