The Siemens 6SL3211-0KB11-2BB0 is a SINAMICS G110 CPM110 AC drive rated for 0.12 kW in both constant-torque (CT) and variable-torque (VT) duty, fed from a single-phase 200–240 VAC supply at 47–63 Hz. It includes a built-in Class B EMC filter, so it meets conducted-emission limits for residential and light-industrial environments without an external filter — one less part to panel-mount and wire. The RS485 interface uses the USS protocol, which is the native serial bus for Siemens micromaster-family drives; a standard RJ45 or screw-terminal connection ties it to a PLC or a Siemens BOP (Basic Operator Panel) for parameter access.
What the ratings mean for fit
The 0.12 kW rating at 150% overload for 60 seconds means this drive can handle short-duration load spikes — a small conveyor starting under load or a pump clearing a blockage — without tripping. The CT rating (constant torque) applies to conveyors, positive-displacement pumps, and other loads that demand full torque across the speed range; the VT rating (variable torque) covers centrifugal fans and pumps where torque rises with speed. Both ratings are the same 0.12 kW here, so the drive is sized for the smallest motor in the SINAMICS G110 family. Ambient temperature range is -10 to +50 °C without the BOP (Basic Operator Panel) fitted. If you add the BOP for local control or parameter readout, the maximum ambient may derate — check the mounting orientation and enclosure ventilation. The IP20 rating means it is protected against solid objects larger than 12 mm (fingers, tools) but not against moisture; install it inside a dry control cabinet, not in a washdown area. Physical dimensions are 150 mm high × 90 mm wide × 101 mm deep (H×W×D). The drive is supplied without a heatsink — the aluminium backplate of the housing serves as the heat-dissipation surface. For panel integration, ensure the backplate is mounted against a clean metal surface or has at least 50 mm of free air above and below for natural convection. The 90 mm width fits standard DIN-rail spacing, but the drive clips onto the rail via its integral latch; no adapter plate is needed.
Where it is used
This drive class — a compact, single-phase-input micro drive — is used for small motor loads in industrial and commercial machinery: conveyor sections, agitators, small pumps, fans, packaging equipment, and machine-tool auxiliaries. The 0.12 kW rating suits motors around 0.16 HP, typical for small belt conveyors, dosing pumps, or ventilation fans in panel enclosures. The built-in Class B filter makes it suitable for European CE-marked installations without an external EMC filter, saving panel space and wiring time.