Siemens 6SL3210-1KE21-3AF1 SINAMICS G120C Compact Converter
A networked compact converter for medium-power motor control with integrated filtering and safety.
Technical Summary
6SL3210-1KE21-3AF1 is a SINAMICS G120C converter whose PROFINET interface, control I/O and power electronics are integrated in one cabinet device. The construction is intended for straightforward automation integration while preserving the drive functions needed for common industrial motor duties.
The complete article code is important when replacing a neighboring G120C model because power, filter, communication and frame options are not interchangeable by appearance alone.
Specifications
| Manufacturer | Siemens |
|---|---|
| Article Number | 6SL3210-1KE21-3AF1 |
| Product Family | SINAMICS G120C |
| Line Supply | Three-phase 380–480 V AC, +10% / −20% |
| Line Frequency | 47–63 Hz |
| Low-Overload Power | 5.5 kW |
| High-Overload Power | 4.0 kW |
| Integrated Filter | Class A |
| Communication | PROFINET and EtherNet/IP |
| Control I/O | 6 DI, 2 DO, 1 AI, 1 AO and motor-temperature input |
| Safety Function | Safe Torque Off |
| Protection | IP20 / UL open type |
| Frame Size | FSB |
| Typical Power Loss | 173 W |
| Product Status | Active |
Features
- Compact all-in-one design supports cabinet installations that do not require a separate Control Unit.
- Sensorless vector regulation and configurable V/f characteristics cover a broad range of motor-control tasks.
- Integrated network diagnostics support controller-based operation and maintenance.
- The control supply may be maintained independently where the machine architecture requires it.
Compatibility
- Engineer the converter with a motor and load profile suitable for the selected overload duty.
- Retain the PROFINET or EtherNet/IP controller mapping and safety-circuit design used by the existing machine.
- Verify the specified line-side protective device, EMC installation, motor cable and any braking accessory.
Replacement
- Export the commissioning data and document parameter changes before removal.
- Check the exact suffix when comparing spares because G120C units with similar power ratings may use a different bus or filter.
- Run a controlled motor identification or parameter validation as required, then repeat the machine functional and safety tests.
FAQ
Can 6SL3210-1KE21-3AF1 replace the USS/Modbus version of the same power class?
No direct exchange should be assumed because the fieldbus, controller project and wiring differ.
Which communication protocol should be confirmed for 6SL3210-1KE21-3AF1?
Confirm whether the installed controller uses PROFINET or EtherNet/IP and preserve its drive telegram, addressing and diagnostics.
What motor information is needed before ordering 6SL3210-1KE21-3AF1?
Provide rated voltage, current, frequency, speed, duty, load type, cable length and any braking requirement.
Can the safety circuit be left untested after a 6SL3210-1KE21-3AF1 exchange?
No. The safe-torque-off path and machine safety reaction require documented validation after hardware replacement.
Why must the filter option be checked on 6SL3210-1KE21-3AF1?
It affects the EMC installation and distinguishes this article from otherwise similar unfiltered variants.
What backup is useful for commissioning 6SL3210-1KE21-3AF1?
Retain the parameter file, controller project, network identity, motor dataset, terminal assignment and latest acceptance record.
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