SIEMENS 6SL3120-2TE21-0AA4
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SIEMENS | Drive Technology | Inverter
- EICHLER-art.no.: K0375195
- EAN: 887621204112
- UPC: 887621204112
Product description
SINAMICS S120 DOUBLE MOTOR MODULE INPUT: DC 600V OUTPUT: 3-PH 400V, 9A/9A FRAME SIZE: BOOKSIZE INTERNAL AIR COOLING OPTIMIZED PULSE SAMPLE AND SUPPORT OF THE EXTENDED SAFETY INTEGRATED FUNCTIONS INCL. DRIVE-CLIQ CABLE
Services for SIEMENS 6SL3120-2TE21-0AA4
SIEMENS |
6SL3120-2TE21-0AA4 –
additional product information
| Delivery information | |||
|---|---|---|---|
| Export identifier | AL: 9I999IR ECCN: N | ||
| Net weight | 5.8 | ||
| Quantity | 1 Stück | ||
| Packaging quantity | 1 | ||
| Additional product information | |||
|---|---|---|---|
| Product status | EOP: 2018-10-01 | ||
| EAN | 887621204112 | ||
| UPC | 887621204112 | ||
| Static lot number | 85044085 | ||
| List indicator | D21MC | ||
| Product group | 9485 | ||
| Country of origin | DE | ||
| Compliance with the substance restrictions according to RoHS directive | Since: 20130221 | ||
| Product classifications | Version | Classification | |
|---|---|---|---|
| eClass | 4 | / | |
| eClass | 5.1 | 27-02-32-01 | |
| eClass | 6.0 | 27-02-32-01 | |
| ETIM | 3 | / | |
| ETIM | 4 | / | |
| ETIM | 5 | / | |
What is 6SL3120-2TE21-0AA4 and where is it used?
The 6SL3120-2TE21-0AA4 is a SIEMENS SINAMICS S120 Double Motor Module in Booksize format. The module is part of the modular SINAMICS S120 drive system and is designed for precise motion-control applications in industrial machinery and plant engineering. As a Double Motor Module, it supplies two motor outputs within a common drive system. Typical application areas for SINAMICS S120 include packaging machines, machine tools, handling systems, presses, and printing, paper, plastics and textile machinery, wherever multiple axes must be controlled compactly, dynamically and with high repeatability. For maintenance and purchasing departments, the part number is particularly important when an existing S120 system must be repaired quickly, identified correctly or secured with a suitable replacement strategy.
Overview of the most important technical data and what it means
The module operates with a 600 V DC input and provides 3 AC 400 V output with 9 A / 9 A rated current. The designation Double Motor Module means that two motor channels are integrated into a single device. The Booksize design is intended for compact, modular control cabinet concepts and supports space-saving axis integration. Internal air cooling means that heat dissipation relies on the intended cooling-air concept, making a clean and unobstructed airflow essential for reliable operation. The specification including DRIVE-CLiQ cable is important for replacement and recommissioning because SINAMICS S120 components are identified and integrated via DRIVE-CLiQ. Siemens also specifies optimised pulse patterns and support for Extended Safety Integrated functions. EICHLER lists a net weight of 5.8 kg.
Product status, life-cycle status and obsolescence
For this part number, obsolescence is clearly a relevant topic. EICHLER lists an EOP (End of Product) date of 01 October 2018 for 6SL3120-2TE21-0AA4. Siemens has also published official phase-out and discontinuation information for SINAMICS S120 Booksize Motor Modules and states that these modules should no longer be used in new machine designs. Siemens identifies 6SL3120-2TE21-0AD0 as the verified successor. In the sales and release documentation for the newer Booksize C-Type and D-Type Motor Modules, Siemens describes these successor units as having the same technical data as the previous Booksize modules. For operators of existing systems, the module therefore remains serviceable and procurable, while new projects should be evaluated using the successor generation.
Available EICHLER services and when they are relevant
EICHLER offers several practical support options for this part number: repair, exchange, used and new on request. For repairs, EICHLER specifies a turnaround time of 7–10 days and includes technical cleaning, preventive maintenance, comprehensive functional testing and a minimum 24-month warranty. This is particularly useful when the existing module should remain in the original system and a planned shutdown is possible. Exchange units and used modules are listed with 1–3 day availability, making them the preferred choice when unplanned downtime is the primary concern. For purchasing managers and decision-makers, this combination provides flexibility, reduces downtime risk, supports continued operation despite product discontinuation and enables a balanced decision between rapid availability and long-term repairability.
| Fault description | Possible solution |
|---|---|
| Why does my SINAMICS S120 report F30005 Power Unit: I²t overload? | This fault indicates a thermally relevant overload of the power section. Siemens describes F30005 as an I²t overload that is triggered when the permissible current level or load duration is exceeded for too long. Therefore, check the load profile, axis mechanics, mechanical stiffness, switching frequency, oversized motion profiles and the cooling performance of the module. It is also advisable to review the diagnostic values, particularly whether the overload indicator has reached the fault threshold. If F30005 reappears immediately even with the motor disconnected, the power unit itself should be examined more closely. |
| Why does my SINAMICS S120 report F30021 Power Unit: Earth fault immediately at start-up? | Siemens assigns F30021 to the power unit earth-fault monitoring function. The decisive factor is the sum of the phase currents, which is monitored diagnostically. Therefore, first check the motor cable, connectors, terminals, shielding, motor insulation and any signs of moisture ingress. If the fault only occurs under load, the cable between the motor and the module should also be tested under real operating conditions. In addition, the monitoring threshold must be parameterised above the residual summation current present during normal operation. If the fault occurs together with other Power Unit messages after cable or cooling-fan issues, a more detailed inspection of the module is recommended. |
| Why does SINAMICS S120 display F31118 Encoder 1: Speed difference outside tolerance? | Siemens describes F31118 as a deviation between the actual measured speed and the expected speed that exceeds the permissible tolerance range. Typical starting points are the encoder supply, encoder cable, shielding, connectors, electrical interference and signal processing via a Sensor Module such as the SMC30. Siemens forum discussions repeatedly identify the encoder, wiring and the SMC30 version as common causes of this fault. Therefore, first check the entire signal path from the encoder to the evaluation electronics, then review the tolerance parameter settings, and only afterwards investigate the Motor Module itself. If F31118 occurs sporadically or cannot be acknowledged, the firmware and hardware versions of the involved components should also be checked. |
| Why does my SINAMICS S120 trigger F30002 DC-link overvoltage during braking or deceleration? | F30002 means that the DC-link voltage has exceeded the shutdown threshold. This typically occurs with highly regenerative axes, excessively short deceleration ramps or when regenerated energy cannot be dissipated correctly. Therefore, check the braking ramp, DC-link concept, any braking components and the parameterisation of the supply voltage. Siemens recommends evaluating the fault values and verifying the mains voltage parameters. If the fault mainly occurs during braking phases, the focus should be on energy regeneration, braking resistors or braking choppers rather than on the encoder system. |
| Why does my SINAMICS S120 report F30027 DC-link precharge monitoring time exceeded? | This fault indicates that the power unit DC link was not precharged within the permitted time. Check the mains supply, enable signal, contactors, precharge circuit and the readiness status of the power unit. Siemens also identifies monitoring time parameter p0857 as a relevant point of investigation. If the device remains stuck in the precharge phase or if the supply voltage fluctuates during start-up, F30027 is a typical result. If the supply voltage is stable and the fault persists, the power electronics of the module should be examined in more detail. |
Is 6SL3120-2TE21-0AA4 a standard inverter or a SINAMICS S120 Motor Module?
6SL3120-2TE21-0AA4 is listed in the shop under the inverter category, but technically it is a SINAMICS S120 Double Motor Module in Booksize design. For procurement, this distinction is important because in S120 systems not only the electrical rating matters, but also the component's role within the modular drive system. When looking for a replacement, it is therefore advisable to search specifically for a Double Motor Module, Booksize design and the exact article number rather than simply for an "inverter". This significantly reduces the risk of ordering the wrong part and speeds up identification during service work.
Is 6SL3120-2TE21-0AA4 discontinued?
Yes. This article number is clearly associated with life-cycle management and obsolescence. EICHLER lists the product status as EOP: 2018-10-01. Siemens has also published official phase-out and discontinuation information for the affected S120 Booksize product family and recommends that this generation should no longer be used in new machine designs. For existing installations, this does not automatically mean the end of support, but it does increase the importance of repairability, replacement options and spare-parts strategies.
Is there a compatible Siemens successor for 6SL3120-2TE21-0AA4?
Yes. Siemens identifies 6SL3120-2TE21-0AD0 as the successor to 6SL3120-2TE21-0AA4. Particularly important is the official Siemens sales and delivery release, which describes the spare-part successors as variants with exactly the same specifications as the previous Booksize modules. For purchasing and engineering departments, this is a strong indication when evaluating replacement options. Nevertheless, the actual machine configuration, topology and parameter settings should always be verified before installing the successor in an existing system.
What do the specifications 600 V DC, 3AC 400 V and 9 A/9 A mean for this module?
These values describe the module's function within the drive system. 600 V DC refers to the DC-link input voltage, 3AC 400 V to the three-phase motor output voltage, and 9 A/9 A indicates that the Double Motor Module provides two motor outputs, each rated at 9 A. For maintenance personnel, this information is important for correctly identifying the module's position within the axis group. For purchasing departments, it helps eliminate similar S120 variants with different current ratings or form factors. In SINAMICS S120 systems, interchangeability depends heavily on the exact combination of article number, current rating and design type.
Does 6SL3120-2TE21-0AA4 support DRIVE-CLiQ and Safety functions?
Yes. Siemens specifies this module as being supplied with a DRIVE-CLiQ cable and supporting Extended Safety Integrated functions. This is important during commissioning because S120 components are identified and integrated into the system topology via DRIVE-CLiQ. For operators, this means that a replacement must match not only the power section but also the communication and safety integration of the existing system. For this reason, the exact MLFB is usually more important than selecting a drive with a similar general description.
When is repair more appropriate than replacement?
Replacement is generally the better option when downtime costs are high and the machine must be returned to operation as quickly as possible; EICHLER specifies a delivery time of 1–3 days. Repair is often preferable when the existing module should be retained and a planned downtime window is available; EICHLER specifies 7–10 days and includes technical cleaning, preventive maintenance, comprehensive functional testing and a minimum 24-month warranty. From a strategic perspective, repair is often attractive when the goal is to reduce obsolescence risks and extend the useful life of existing spare-part inventories. For purchasing departments, considering repair, replacement, used units and new units on request provides the highest level of supply security.
