SIEMENS 6SL3210-1SE21-0UA0 Sinamics S120 PM340 4kW

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The SIEMENS SINAMICS S120 PM340 is a 4 kW power module designed for single-axis drive applications within the SINAMICS S120 family. It is used with a compatible CU310-2 DP or CU310-2 PN control unit to provide controlled speed and torque for AC motors installed on CNC machines and industrial equipment.

The module is designed for a 380–480 V AC three-phase supply and provides a 3-phase motor output of 10 A, corresponding to a 4.0 kW power rating. Its blocksize FSB construction with integrated air cooling allows compact installation inside industrial control cabinets.

The 6SL3210-1SE21-0UA0 is suitable for CNC auxiliary axes, conveyors, pumps, tool-handling systems and other industrial motion applications requiring reliable variable-speed motor control. It can be used as a replacement unit, spare part or CNC replacement component when the existing SINAMICS S120 configuration requires a like-for-like replacement.

Parameterization and commissioning are normally performed using Siemens engineering software such as STARTER or TIA Portal Startdrive, depending on the installed control architecture. Before replacement, technicians should verify the complete order number, supply voltage, motor power, control unit and existing parameter configuration.

The module is manufactured by SIEMENS and is suitable for maintenance, retrofit and repair operations on existing SINAMICS S120 installations. A tested unit can be supplied after verification of the power stage and basic operating functions.

Frequently asked questions about 6SL3210-1SE21-0UA0:

Which control units are typically used with this PM340?
It is commonly paired with a CU310-2 DP or CU310-2 PN. Select the version that matches your fieldbus and firmware strategy to maintain compatibility with the existing control environment.

Is the 4 kW rating suitable for 400 V class plants?
Yes, this PM340 variant is used for 4 kW class motors on standard three-phase 400 V class networks. Always confirm motor current, overload class and application duty in your sizing files before replacement.

Can it replace a failed PM340 with the same order number without rewiring?
When the order number matches, it is typically a drop-in replacement. Back up parameters from the existing CU310-2 and restore them to the replacement unit to reduce commissioning time.

Is PM340 intended for multi-axis common DC link systems?
PM340 is used for S120 single-axis AC/AC setups. For multi-axis common DC link applications, Siemens Motor Modules with a line module are generally used instead.