Electrical Interfaces
AGD155 Product Manual Rev.2.2
Page 26
3.4.6 Interface X9: Regeneration
The REGEN port is used to connect an external power resistor to dissipate energy generated by the
motor, typically during deceleration. The motor-generated energy will charge up the internal
capacitor. When the internal capacitor is fully charged, the bus voltage will increase. When bus
voltage is higher than the operating limit of the product, it will trigger over-voltage protection and
disable the motor. To prevent this from happening, users can connect an external power resistor to
dissipate the unwanted energy.
Figure 15. Regeneration Connector
Connector X9: REGEN
Pin # Name
Description
1
VB+
The internal DC bus power.
(Warning: This is typically more than 300 VDC)
2
RGN (Regeneration)
Regeneration pin to be connected to an external regeneration
resistor. Designed for 16A (not protected). When Regeneration is
triggered, this pin is connected internally to PGND.
The other end of the external regeneration resistor should be
connected to VB+, the Internal DC Bus power (pin 1).
Connector manufacturer
Phoenix Contact
Mating connector part number
1942484
(Wurth Electronics equivalent: 691340500002)
(Degson equivalent: 2EDGKDM-5.08-2P-14)
Connector pitch
5.08 mm
Wiring
14-16 AWG, insulation rated for 600 V
The regeneration feature, once enabled, is always active, regardless of the motor status
(enabled/disabled).
Current will flow in the regeneration resistor depending on the values of RegenOn and RegenOff,
and the power supply voltage.
There are no current or power protections to protect the regeneration resistor or the internal
MOSFET.
Be sure to set the suitable regeneration parameters for the supply voltage and the external
regeneration resistor.
