Sigma II User’s Manual Chapter 5: Parameter Settings and Functions5-1275.8.7 DB UnitLarge capacity amplifiers (22-55kW) do not have internal DB resistors. An externalDB unit is needed if dynamic braking function is required for the application.Externally attach a DB unit to the amplifier.This DB unit is used for dissipating motor EMF energy.The DB unit does not need to be installed if the dynamic brake function is notrequired. SpecificationsUse one of the following DB units according to the Amplifier model.SDGH- 2BDE 3ZDE 3GDE 4EDE 5EDERegenerative DB Unit JUSP- DB03 DB04 DB05 DB06DB contactor and surgeabsorbtion unitBuilt into Amplifier Built into DB unitResistance 0.8ΩResistance Capacity 180W 300WAllowable Load Moment ofInertia5 times the load moment of inertia at motor shaft.Allowable Duty Less than 1 time/H at maximum speed DB operation.
