User's Manual - Minarik

18 OperationRegenerative deceleration (R51UA)Short terminals S0 and T0 to regeneratively decelerate themotor to a stop (Figure 12). Because there is no decelerationadjustment on this drive, the speed at which the decelerationof the motor takes place will be completely dependent uponload inertia, friction and the settings of the FWD TQ and REVTQ trimpots. This is the fastest stopping action available.Figure 12. RG51UA Regenerative DecelerationSwitch Connection WarningFor frequent starts and stops, use regenerative deceleration(shorting RB and S0 on RG25U, or shorting S0 and T0 onRG51UA). Do not use of this method for emergencystopping. They may not stop a drive that is malfunctioning.Removing AC line power (both L1 and L2) is the onlyacceptable method for emergency stopping.Frequent regenerative deceleration, regenerative braking,produces high torque. This may cause damage to motors,especially gearmotors that are not properly sized for theapplication.