4 System Design
4 - 50
G5-series Linear Motors/Servo Drives With Built-in EtherCAT Communications
If the regenerative energy exceeds the regeneration absorption capacity of the Servo Drive, connect an
External Regeneration Resistor.
Connect the External Regeneration Resistor between B1 and B2 terminals on the Servo Drive.
Double-check the terminal names when connecting the resistor because the drive may be damaged if
connected to the wrong terminals.
The surface of the External Regeneration Resistor will heat up to approximately 200°C. Do not place it
near equipment and wiring that is easily affected by heat. Attach radiator plates suitable for the heat
radiation conditions.
4-5-3
Regenerative Energy Absorption with an External Regeneration
Resistor
Model
Resistance
value
Nominal
capacity
The amount of
regeneration
absorption for
120°C
temperature rise
Heat
radiation
condition
Thermal switch output
specifications
R88A-RR08050S
50
Ω
80 W
20 W
Aluminum
350 × 350,
Thickness:
3.0
Operating temperature: 150°C ±5%
NC contact
Rated output (resistive load)
125 VAC, 0.1 A max.
30 VDC, 0.1 A max.
(minimum current: 1 mA)
R88A-RR080100S
100
Ω
80 W
20 W
Aluminum
350 × 350,
Thickness:
3.0
Operating temperature: 150°C ±5%
NC contact
Rated output (resistive load)
125 VAC, 0.1 A max.
30 VDC, 0.1 A max.
(minimum current: 1 mA)
R88A-RR22047S1
47
Ω
220 W
70 W
Aluminum
350 × 350,
Thickness:
3.0
Operating temperature: 150°C ±5%
NC contact
Rated output (resistive load)
250 VAC, 0.2 A max.
42 VDC, 0.2 A max.
(minimum current: 1 mA)
R88A-RR50020S
20
Ω
500 W
180 W
Aluminum
600 × 600,
Thickness:
3.0
Operating temperature: 200°C ±7°C
NC contact
Rated output (resistive load)
250 VAC, 0.2 A max.
42 VDC, 0.2 A max.
(minimum current: 1 mA)
