Omron R88D-GT series, User Manual

Page: 284 / 510

4-49
4-4 Regenerative Energy Absorption
4
System Design
Absorbing Regenerative Energy with an External Regeneration
Resistor
If the regenerative energy exceeds the 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
Servo Drive may be damaged by burning if connected to the wrong terminals. The External
Regeneration Resistor will heat up to approximately 120
°
C. Do not place it near equipment and
wiring that is easily affected by heat. Attach radiator plates suitable for the heat radiation conditions.
 External Regeneration Resistor
Performance Specifications
Connecting an External Regeneration Resistor

R88D-GTA5L/-GT01L/-GT02L/-GT01H/-GT02H/-GT04H
If an External Regeneration Resistor is necessary, connect it between B1 and B2 as shown in the
diagram below.
Model Resistance
Nominal
capacity Regeneration ab-
sorption at 120
° C
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: 30 VDC,
50 mA 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: 30 VDC,
50 mA max.
(minimum current: 1 mA)
R88A-
RR22047S1
47
Ω
220 W 70 W
Aluminum,
350
×
350,
Thickness: 3.0
Operating temperature:
150
° C ± 5 ° C
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:
250 VAC, 0.2 A max.
24 VDC, 0.2 A max.
(minimum current: 1 mA)
Servo Drive
B1
B2
External
Regeneration
Resistor
θ>
Thermal Switch Output