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SINUMERIK 840D sl TCU 30.3, FOR SINUMERIK/SIMOTION
| Part Number | 6FC5312-0DA00-1AA1 |
| Manufacturer | Siemens |
| Type | Accessories |
| Model # | 6FC53120DA001AA1 |
| Warranty | 2 Year |
MRO Electric repairs CNCs, PLCs, Servo/Spindle Drives, Motors, Amplifiers, VFDs, HMIs, and more, most of which can be repaired in only 3-5 days.
MRO can restore your failed 6FC5312-0DA00-1AA1 to remanufactured condition and save you up to 75% compared to buying new. We offer standard repair pricing to ensure you the best value for your repair.
Our certified technicians use rigorous testing procedures to ensure your parts are restored to fully functioning condition. Our team proudly stands behind all repairs by providing a minimum 2-year warranty.
Our technicians have vast experience with most manufacturers and models. In addition to this 6FC5312-0DA00-1AA1 we also repair a wide range of other Siemens products, so if you don’t see the model you need, please contact us.
If you are interested in getting credit for your faulty 6FC5312-0DA00-1AA1, just let us know, and we can issue you an RMA to send it in as an exchange. Our exchange program provides you with savings and keeps us stocked for the next time you need anything.
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The Siemens 6FC5312-0DA00-1AA1 is the TCU 30.3 model, a vital component of the SINUMERIK 840D sl (Solution Line) system, designed to deliver cutting-edge performance for CNC and SIMOTION automation platforms. TCU, short for Terminal Control Unit, is the intelligent control hub that manages communication and processing between the numerical control (NC), programmable logic control (PLC), and drive systems. This high-end unit represents Siemens' commitment to providing modular, scalable, and highly integrated solutions for machine tool builders and automation engineers who require peak control precision, speed, and reliability in their production systems.
The 6FC5312-0DA00-1AA1 TCU 30.3 is specifically engineered to serve the needs of high-performance motion control and CNC applications. It is compatible with both the SINUMERIK and SIMOTION platforms, allowing for versatile implementation across a wide range of complex machinery—from multi-axis CNC lathes and milling machines to advanced robotics and motion-centric systems. As part of the SINUMERIK 840D sl solution line, this unit provides a fully digital interface between operator panels, control units, and drive components, enabling coordinated motion and real-time process management.
One of the standout features of the TCU 30.3 is its capacity for high-speed internal communication and data exchange. Its built-in interfaces and integration with Siemens' system buses ensure seamless coordination across all automation layers. It is a centralized node where PLC logic, CNC sequences, HMI signals, and drive instructions converge, guaranteeing the machine operates with minimal latency and maximum accuracy. With this level of real-time data handling, the 6FC5312-0DA00-1AA1 enables higher spindle speeds, faster tool changes, and improved surface finishes in CNC applications.
Like all SINUMERIK components, the TCU 30.3 is designed to meet the rigorous demands of industrial environments. It offers long-term durability, thermal stability, and protection against electromagnetic interference (EMI). Its housing and internal electronics are optimized for performance in control cabinets subjected to temperature extremes, vibration, and electrical noise. Furthermore, it supports hot-swappable connections and easy configuration, allowing for fast commissioning and reduced maintenance time.
The Siemens 6FC5312-0DA00-1AA1 supports scalable architecture, allowing machine builders to design systems that can grow in complexity without compromising performance. Whether building a two-axis lathe or a ten-axis machining center with integrated robotics, the TCU 30.3 provides the flexibility to scale operations through modular expansion and seamless integration with other SINAMICS and SIMOTION modules. Its compatibility with Siemens engineering tools, such as SinuTrain and TIA Portal, simplifies programming and diagnostics.
What is the primary function of the TCU 30.3?
It is the terminal control unit for SINUMERIK 840D sl and SIMOTION systems, managing communication and control processes.
Which systems is this TCU compatible with?
It works with SINUMERIK 840D sl CNC platforms and SIMOTION motion control systems.
Does the TCU 30.3 handle real-time motion control?
It is designed for real-time coordination between CNC, PLC, and drive components.
Is this model suitable for complex multi-axis machines?
Absolutely—it is ideal for high-performance, multi-axis CNC and automation applications.
What kind of connectivity does it offer?
It includes system interfaces for internal Siemens buses and peripheral integration.
Can it be configured using Siemens software tools?
It supports engineering through SinuTrain, TIA Portal, and other Siemens platforms.
How is it installed in a system?
It is typically mounted within a control cabinet as part of a modular SINUMERIK setup.
Is it hot-swappable for maintenance?
Yes, it supports easy replacement and system updates with minimal downtime.
What voltage does the TCU operate at?
It operates within the standard low-voltage control system range (typically 24V DC).
Check out the rest of our Siemens product line. Whether it's using our online instant quote feature, giving us a call at (800) 691-8511, or emailing us at sales@mroelectric.com, we strive for customer satisfaction first. This means lower prices and better service for you. For more products like 6FC5312-0DA00-1AA1, take a look at more from our Accessories line. If your current unit has gone bad, take advantage of our Core Exchange program for the most inexpensive route. You can learn more about this program on our FAQ page here. We offer a repair service on all of our 6FC5312-0DA00-1AA1 products that keep your downtime to a minimum. To stay up to date on manufacturer news, as well as access any of our datasheets, manuals, or other documentation, we suggest you take a look at our blog.
Very happy with the overall service, delivery, communication and delivery,
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