3UF5051-3AN00-1 SIEMENS

3UF5051-3AN00-1 Siemens Basis unit

Brand：SIEMENS Model number：3UF5051-3AN00-1

Country of origin: Germany Product weight：0.55kg

HS code：8517623990

Product Details：

Product Dimensions：

The 3UF5051-3AN00-1 is a central unit of the SIMOCODE-DP system, designed to connect seamlessly to a PROFIBUS-DP fieldbus network. It sits between the automation system (PLC/DCS) and the motor starter components. Instead of using separate overload relays, control switches, and current transformers, this single intelligent device performs all these tasks. It continuously monitors the motor current and evaluates diagnostic data, executing control commands directly at the motor feeder level. This model represents a legacy standard in Siemens motor management, replaced in modern systems by the SIMOCODE pro (3UF7) series.

Product Parameters

Product Brand Name: Siemens SIRIUS / SIMOCODE-DP
Product Designation: Basic Central Unit with PROFIBUS-DP Interface
Current Setting Range: $50 \text{ A}$ to $205 \text{ A}$ (integrated current transformer version)
Control Supply Voltage: $115 \text{ VAC}$ to $230 \text{ VAC/DC}$ ( $50/60 \text{ Hz}$ )
Communication Interface: PROFIBUS-DP protocol up to $12 \text{ Mbps}$
Digital Inputs: 4 binary inputs (typically used for local control buttons like Start, Stop, and Remote)
Digital Outputs: 4 binary relay outputs (used for controlling contactors, fault lamps, or status signals)
Trip Class: Adjustable parameter setting (e.g., Class 5, 10, 15, 20, 30) for customized thermal overload protection curves
Protection Rating: IP20 (designed for installation within an enclosure or switchgear cabinet drawer)
Mounting Configuration: Can be mounted onto a standard $35 \text{ mm}$ DIN rail or surface-mounted with screws

Product Advantages

A primary advantage of the 3UF5051-3AN00-1 is its Comprehensive Motor Protection. It guards against overload, phase failure, current asymmetry, and locked rotor conditions, which drastically increases the operational lifespan of heavy industrial motors. The Integrated Architecture is another massive benefit; by combining an internal current transformer with control logic, it cuts down cabinet wiring time, eliminates intermediate relays, and reduces the physical footprint within the motor control center (MCC).

Furthermore, its PROFIBUS-DP Connectivity provides transparent diagnostics. Maintenance personnel can view actual motor current, operational hours, and fault histories remotely, allowing for predictive maintenance before a catastrophic failure happens. The device also supports flexible control functions, enabling configuration for direct-on-line (DOL) starters, reversing starters, or star-delta starters via internal software programming rather than physical wiring changes.

Important Considerations and Precautions

When handling or maintaining the 3UF5051-3AN00-1, you must note its Discontinued Status. Because the 3UF5 series is an older generation, sourcing direct replacements can be difficult, and long-term planning should involve a migration strategy to the SIMOCODE pro (3UF7) line. During initial installation or replacement, it is crucial to verify that the Control Supply Voltage matches the exact model profile ( $115/230 \text{ VAC/DC}$ ), as applying improper voltages will damage the control logic card.

The Current Range Adjustment must be precisely programmed to match the full-load current (FLA) listed on the motor nameplate to prevent false tripping or, conversely, a delayed trip that burns out the motor windings. Proper PROFIBUS Addressing via the hardware DIP switches or software parametrization must be set before connecting the unit to the network; duplicate addresses will disrupt communication across the entire bus segment. Lastly, ensure that the power cables passed through the internal current transformer windows are properly secured and insulated to prevent abrasion against the housing under high-vibration conditions.

Product Applications

The Siemens 3UF5051-3AN00-1 is widely used in continuous process industries where motor downtime equals significant financial loss.

Chemical and Petrochemical: Managing high-capacity pumps, agitators, and dosing systems where precise motor diagnostics are needed for explosion-proof environments.
Water and Wastewater: Controlling heavy-duty high-volume water pumps, blowers, and separation centrifuges.
Mining and Cement Processing: Protecting high-torque conveyor belts, crushers, and rotary kilns subjected to severe mechanical overloads.
Power Generation: Monitoring auxiliary motor drives, such as cooling tower fans and coal feeders, ensuring continuous grid-support reliability.
Pulp and Paper Mills: Driving large pulpers, refiners, and rollers that require precise motor behavior feedback to maintain product quality.

6ES7972-0CB20-0XA0 SIEMENS

We have the same series of models in stock. If you don't find the model you need, please contact us and we will provide you with an official quotation！

SIEMENS6SE6440-2UD13-7AA1

SIEMENS6SL3224-0BE37-5AA0

SIEMENS6DD1684-0BC0

SIEMENS6DD1684-0AH0

SIEMENS6AV6542-0CA10-0AX0

SIEMENS3RT1044-1AG20

SIEMENS6AV6647-0AH11-3AX0

SIEMENS3RT2017-1AF01

SIEMENS6ES7321-1CH20-0AA0

SIEMENS6ES7331-7HF01-0AB0

SIEMENS6ES7195-7HA00-0XA0

SIEMENS6SE70386GL841JA1