3-42
Note 2. The External Regeneration Resistance Unit is for use with R88D-WT60H to R88D-WT150H
Servo Drivers only. It cannot be connected to other Servo Drivers.
Note 3. For external dimensions, refer to 2-9 External Regeneration Resistors/Resistance Units.
H External Regeneration Resistors and External Regeneration
Resistance Units
D Specifications
Model Resistance Nominal
capacity
Regeneration
absorption at
120°C
Heat radiation Thermal
switch output
R88D-RR22047S
External
Regeneration
Resistor
47 Ω ± 5% 220 W 70 W
t1.0 × j350
(SPCC)
Operating
temperature:
170°C
NC contact
R88D-RR88006
External
Regeneration
Unit
6.25 Ω ± 10% 880 W 180 W – –
Note The following external regeneration resistors are recommended products from another manufacturer, Iwa-
ki Musen Kenkyusho Co., Ltd. For details, refer to the manufacturer’s documentation.
RH120N50ΩJ 50 Ω ± 5% 30 W (Amount of regeneration at 120°C)
RH300N50ΩJ 50 Ω ± 5% 75 W (Amount of regeneration at 120°C)
RH500N50ΩJ 50 Ω ± 5% 100 W (Amount of regeneration at 120°C)
D Combining External Regeneration Resistors (R88D-RR22047S)
Note A combination cannot be used if the resistance is less than the minimum connection resistance
for any given Servo Driver. Refer to the following table for the minimum connection resistance
values for each Servo Driver, and select a suitable combination.
System Design and Installation
Chapter 3
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