Chapter 3
3-40
System Design and Installation
Note External Regeneration Resistors cannot be connected to 30- to 200-W Servo Drivers.
Note These are the values at 100 V AC for 100-V AC models, and at 200 V AC for 200-V AC models.
3-3-3 Regenerative Energy Absorption by External
Regeneration Resistance
For 400- to 750-W Servo Drivers, if the regenerative energy exceeds the absorption
capacity of the Servo Driver by itself, then external regeneration resistance can be
connected.
A Resistor or Unit can be used alone or in combination with other Resistors/Units to
provide the required regeneration processing capacity.
!Caution Connect the External Regeneration Resistor or External Regeneration Resistance
Unit between the Servo Driver’s B1 and B2 terminals. Check the terminal names
carefully when connecting to the terminals. If the Resistor or Unit is connected to
the wrong terminals it will damage the Servomotor.
Note 1. The External Regeneration Resistor can reach a temperature of approximately 120
°C, so
install it at a distance from heat-sensitive devices and wiring. In addition, a radiation shield
must be installed according to the radiation conditions.
Note 2. For external dimensions, refer to 2-9 External Regeneration Resistor Specifications.
Servo Driver Regenerative energy (J)
that can be absorbed by
internal capacitor (See
note 1.)
Internal regeneration resistance
Average amount of
regeneration that can
be absorbed (W)
Resistance (
Ω)
R7D-APA3L 57.1 – –
R7D-APA5L 57.1 – –
R7D-AP01L 57.1 – –
R7D-AP02L 57.1 – –
R7D-AP04L 57.1 – –
R7D-APA3H 18.5 – –
R7D-APA5H 18.5 – –
R7D-AP01H 37.1 – –
R7D-AP02H 37.1 – –
R7D-AP04H 37.1 – –
R7D-AP08H – 12 50
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