
6SL3544-0FB21-1FA0 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $83.94 | Condition is New – Open box, SIEMENS 6SL3544-0FB21-1FA0 SINAMICS G120D CONTROL UNIT 04250290186, shipping cost = $39.34 | 99.8% |
![]() | $693.60 | Condition is New – Open box, Siemens 6SL3544-0FB21-1FA0 Control Unit FNOB, shipping cost = $18.30 | 99.8% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $550.00 | Condition is New, SIEMENS 6SL3544-0FB21-1FA0, INTEGRATED CONTROL UNIT, NEW #256214, shipping cost = $21.96 | 99.9% |
![]() | $625.00 | Condition is New, SIEMENS 6SL3525-0PE17-5AA1 W/ ATTACHED 6SL3544-0FB21-1FA0 POWER MODULE, #350645, shipping cost = $27.73 | 99.9% |
![]() | $850.00 | Condition is New, NEW - SIEMENS 6SL3544-0FB21-1FA0 SINAMICS CONTROL UNIT CONVERTER MOTOR (V-12), shipping cost = $16.40 | 100.0% |
![]() | $817.00 | Condition is New, New Siemens 6SL3544-0FB21-1FA0 24 Months Warranty , shipping cost = $175.53 | 99.8% |
![]() | $1042.00 | Condition is New, high quality Siemens 6SL3544-0FB21-1FA0 Brand New Free Ship 6SL3 544-0FB21-1FA0, FREE SHIPPING | 99.8% |
![]() | $1000.00 | Top Pick! Condition is New, Siemens SINAMICS PM250D 6SL3525-0PE17-5AA1 + 6SL3544-0FB21-1FA0, shipping cost = $43.07 | 100.0% |
![]() | $1082.50 | Condition is New, 6SL3544-0FB21-1FA0 SIEMENS Frequency Converter Brand New in Box Spot Goods, FREE SHIPPING | 100.0% |
![]() | $1143.65 | Condition is New, ONE NEW SIEMENS Control unit 6SL3544-0FB21-1FA0 6SL35440FB211FA0 DHL/FedEx, FREE SHIPPING | 100.0% |
![]() | $1202.60 | Top Pick! Condition is New, ONE NEW SIEMENS Control unit 6SL3544-0FB21-1FA0 6SL35440FB211FA0, FREE SHIPPING | 100.0% |
![]() | $1182.90 | Condition is New, 1PCS SIEMENS Control unit 6SL3544-0FB21-1FA0 6SL35440FB211FA0 NEW#YC#, shipping cost = $30.00 | 96.6% |
![]() | $1198.60 | Top Pick! Condition is New, 1PCS NEW SIEMENS Control unit 6SL3544-0FB21-1FA0 6SL35440FB211FA0, shipping cost = $120.00 | 100.0% |
![]() | $1407.15 | Top Pick! Condition is New, ONE NEW SIEMENS Control unit 6SL3544-0FB21-1FA0 6SL35440FB211FA0, FREE SHIPPING | 100.0% |
![]() | $1436.15 | Condition is New, ONE NEW SIEMENS Control unit 6SL3544-0FB21-1FA0 6SL35440FB211FA0, FREE SHIPPING | 100.0% |
![]() | $1456.69 | Condition is New, SIEMENS 6SL3544-0FB21-1FA0 SINAMICS G120D CONTROL UNIT CU240D PN-F PROFINET GQ2, FREE SHIPPING | 100.0% |
![]() | $1461.97 | Condition is New, ONE NEW SIEMENS Control unit 6SL3544-0FB21-1FA0 6SL35440FB211FA0, FREE SHIPPING | 100.0% |
![]() | $1440.00 | Condition is New, 1PC NEW SIEMENS 6SL3544-0FB21-1FA0 frequency converter Via DHL or FedEx, shipping cost = $40.00 | 100.0% |
![]() | $1455.44 | Top Pick! Condition is New, Siemens G120D control unit CU240D-2 inverter control unit 6SL3544-0FB21-1FA0, shipping cost = $60.00 | 100.0% |
![]() | $1565.14 | Condition is New, 1PCS SIEMENS Control unit 6SL3544-0FB21-1FA0 6SL35440FB211FA0 NEW, FREE SHIPPING | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $323.75 | Condition is Used, SIEMENS 6SL3544-0FB21-1FA0, INTEGRATED CONTROL UNIT #305976, shipping cost = $21.96 | 99.9% |
![]() | $540.00 | Condition is Used, 6SL3544-0FB21-1FA0 siemens Brand fast shipping, FREE SHIPPING | 100.0% |
![]() | $525.38 | Top Pick! Condition is Used, Used Siemens 6SL3544-0FB21-1FA0 24 Months Warranty , shipping cost = $176.50 | 99.8% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $570.40 | Condition is Seller refurbished, Siemens 6SL3544-0FB21-1FA0 Refurbished SINAMICS G120D Control Unit CU240D-2, shipping cost = $130.00 | 100.0% |
![]() | $688.00 | Condition is Seller refurbished, Siemens 6SL3544-0FB21-1FA0 Used/Refurbished, shipping cost = $17.41 | 99.9% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $759.08 | Condition is Neu: Sonstige (siehe Artikelbeschreibung), SINAMICS G120D CONTROL UNIT CU240D-2 PN-F - 6SL3544-0FB21-1FA0 (NO), shipping cost = $35.36 | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $631.19 | Condition is Gebraucht, Siemens SINAMICS G120D Power Module 6SL3525-0PE21-5AA1 with Control Unit, shipping cost = $111.98 | 100.0% |

The Siemens 6SL3544-0FB21-1FA0 is a versatile and advanced control unit designed for use in various industrial applications. This control unit is part of Siemens' SIMATIC S7-1200 series, which is known for its high performance, reliability, and ease of use.
The 6SL3544-0FB21-1FA0 control unit features a compact design with a width of only 35 millimeters, making it an excellent choice for space-constrained installations. Despite its small size, it offers a large capacity of up to 16 input and 16 output modules, allowing it to handle a wide range of I/O requirements.
This control unit comes with a built-in PROFIBUS DP and Ethernet interface, enabling seamless communication with other automation devices and systems. It also supports various communication protocols, including Modbus TCP/IP, EtherNet/IP, and SERCOS III, making it highly adaptable to diverse industrial environments.
The Siemens 6SL3544-0FB21-1FA0 control unit offers excellent diagnostic capabilities, allowing users to quickly identify and resolve any issues that may arise. It features a large, clear TFT color display with a resolution of 240 x 320 pixels, which provides easy access to important information and settings. Additionally, it supports various programming languages, including TIA Portal, STEP 7, and TwinCAT, providing flexibility for different programming requirements.
The control unit is designed to operate in harsh industrial environments, with a temperature range of -25 to 60 degrees Celsius and a high protection rating of IP65/67. It also features a robust design with a metal housing, ensuring durability and long-term reliability.
In summary, the Siemens 6SL3544-0FB21-1FA0 control unit is a compact, versatile, and advanced solution for industrial automation applications. Its built-in communication interfaces, large capacity, and excellent diagnostic capabilities make it an ideal choice for a wide range of applications, while its robust design ensures long-term reliability and durability.
The Siemens 6SL3544-0FB21-1FA0 control unit is a popular choice for those seeking advanced functionality and reliability in their industrial automation applications. Below are some potential pros and cons to consider before making a purchase.
Pros:1. Advanced Functionality: This control unit comes equipped with a wide range of advanced functions and capabilities, including PID control, sequencing, timer functions, and more. It also supports various communication protocols, making it a versatile choice for different industrial applications.
2. High-performance I/O: The control unit offers a high-performance I/O system, allowing it to handle large amounts of data and respond quickly to inputs. This is particularly important in industrial applications where quick response times are essential.
3. Durable Construction: Siemens is known for its high-quality and durable products, and the 6SL3544-0FB21-1FA0 control unit is no exception. It is designed to withstand harsh industrial environments, ensuring long-term reliability and minimal downtime.
4. Easy-to-use Software: The control unit comes with Siemens' TIA Portal software, which is known for its user-friendly interface and intuitive programming language. This makes it easier for operators and engineers to configure and troubleshoot the system, reducing the learning curve and improving overall efficiency.
Cons:1. Cost: The Siemens 6SL3544-0FB21-1FA0 control unit is a premium product, and its price point reflects its advanced features and capabilities. This may be a barrier for smaller organizations or those with limited budgets.
2. Complexity: With its advanced functionality and features, the control unit can be complex to set up and program, particularly for those without extensive automation experience. This may require additional training or consulting fees.
3. Compatibility: While the control unit supports various communication protocols, it may not be compatible with all existing systems and devices. This could require additional hardware or software investments to ensure seamless integration.
Conclusion:The Siemens 6SL3544-0FB21-1FA0 control unit offers advanced functionality, high-performance I/O, and durable construction, making it an excellent choice for organizations seeking reliable and efficient industrial automation solutions. However, its cost and complexity may be a barrier for some, and compatibility with existing systems should be carefully considered before making a purchase.
Recommendation:For organizations with the budget and need for advanced functionality and high-performance I/O, the Siemens 6SL3544-0FB21-1FA0 control unit is an excellent investment. Its user-friendly software and durable construction make it a worthwhile addition to any industrial automation system. However, for those with limited budgets or simpler automation needs, alternative options may be more cost-effective. It's important to carefully evaluate the specific requirements of your organization before making a purchasing decision.
Details:
The product must be the original item shipped, with matching serial numbers if applicable. Special instructions. Manufacturer part number: 6SL3544-0FB21-1FA0. 2-year MRI shield protection plan included.
Most items are in stock when they listed. A new, unused item with no signs of wear. Siemens 6SL3544-0FB21-1FA0 control unit. Siemens 6SL3544-0FB21-1FA0 control unit manufactured by Siemens.
The item has its original packaging but it is not sealed.
specifications faclighting:
- brand: Siemens
- mpn: 6sl3544-0fb21-1fa0
- part type: Control
shipping faclighting:
- service: usps ground advantage, usps priority mail, ups ground, ups next day air
- transit: 5-11 days
- class: standard, expedited, one-day
- carrier: usps, ups
- type: calculated
returns faclighting:
- method: money back
- paid by: buyer
- policy: returns accepted
- time: 30 days
seller faclighting:
- city: mount sterling, kentucky
- rating: 98.9%
- # reviews: 15394
general faclighting:
- category: Business & Industrial > Maintenance Safety > Facility > Lights Lighting
offer faclighting:
- started: october 10, 2025
- availability: in stock
- best offers: true
- prices: $323.75–$1565.14
- item condition:
- New – Open box
- New
- Used
- Seller refurbished
- Neu: Sonstige (siehe Artikelbeschreibung)
- Gebraucht
- in stock #: 5
- options: ship-to-home
- sold #: 24
payments faclighting:
- wallet: google-pay
- other
- credit card: visa
Grouped With:
- 66-1031-055-00: , Siemens
- 3560012: BULB THERMOSTAT, Siemens
- 545-731: MEMORY CONTROLLER, Siemens
- 8WD5320-0CD: LAMP, Siemens





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