GE DS3820EMMA ELECTRIC MODULE

Regenerative Discharge Resistor Selection and Wiring

Regenerative energy is normally created in applications with a high load inertia, high speed,

vertical axes and/or frequent acceleration and deceleration.

When decelerating a load, the  stored kinetic energy of the load creates generator action in the

motor causing energy to be  returned to the servo controller.

For light loads and low acceleration rates, the controller may  be able to absorb and store this energy

in the DC link filter capacitors or dissipate it in an  internal regenerative resistor.

Otherwise, an optional external regenerative discharge unit  must be installed.

The S2K Series controllers include an internal regenerative discharge resistor that will  control the regenerative energy in most applications.

When an Over Voltage fault (LED  Status Code OV) or an Excessive Clamp Duty Cycle fault (LED Status Code EC) occurs  during motor deceleration,

the cause is usually excessive regeneration and requires an  optional external regenerative resistor kit.

The SSI104 controller has no provisions for  connecting an external resistor.

As an alternative to adding an external resistor you can try a  combination of the following actions: 

• Reduce the deceleration rate and/or increase deceleration time

• Lower the top speed of the motor

• Reduce machine cycle rate

• Reduce load inertia connected to the motor

• Increase vertical axis counterbalance

GE Fanuc offers several different resistor kits (all kits include resistor mounting brackets) as

shown in Table 3-25. Wiring between the resistor and the controller’s power terminals is not

included in the kit and is the user’s responsibility. Connections to the resistor can be made

by soldering, using a fast-on type terminal of appropriate size, or using a ring terminal bolted

through the hole in the resistor terminal tab.

Cables and Connector Mates

Cables in several lengths are available from GE Fanuc for motor to controller connections and various other controller functions.

It is strongly recommended that you use the cables  available from GE Fanuc as shown in Table 3-15.

GE Fanuc does not provide mating  connectors for the MTR-Series motors or S-Series motors along with the motor; 

you can,  however, purchase the S-Series and MTR-3T Series motor connector kits, 

shown in table 3- 16, from GE Fanuc.

Note: GE Fanuc cables and connectors shown are not rated for IP67 environments, 

or  washdown applications. GE Fanuc cables are not designed for high flex or cable  track applications.

We have the same series of models in stock. 

If you don't find the model you need, please contact us and we will provide you with an official quotation！