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Siemens MICROMASTER 6SE6440-2UD31-5DA1

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6SE6440-2UD31-5DA1

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Siemens' 6SE6440-2UD31-5DA1 is a precise AC variable frequency drive designed to control motors effectively. It operates under a supply voltage range of 380 to 480 V AC across three phases, providing constant torque output power of 15 kW and variable torque output power reaching 18.5 kW.

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Technical specifications for 6SE6440-2UD31-5DA1

ManufacturerSiemens
Product TypeAC Variable Frequency Drive (without integrated EMC filter)
Product LineMICROMASTER
Part Number6SE6440-2UD31-5DA1
UPC783087635777
Weight7.25 lbs (3.29 kg)
Rated Supply Voltage380–480 V AC, 3-phase ±10%, 47–63 Hz
Constant Torque Output Power15 kW (20 HP)
Variable Torque Output Power18.5 kW (25 HP)
Overload Capacity (Constant Torque)150% for 60 seconds, 200% for 3 seconds
Overload Capacity (Variable Torque)110% for 60 seconds, 140% for 3 seconds
Ingress Protection RatingIP20 (dust-protected, no water resistance)
Operating Temperature Range-10°C to +50°C
Control MethodologiesV/f mode, Sensorless flux vector control
Frequency Adjustment Range0–650 Hz
Dynamic Braking SupportExternal resistor required (minimum 28 Ω)
I/O Interfaces6 digital inputs, 2 analog inputs, 3 relay outputs, 2 analog outputs
Input Current Ratings33.8 A (constant torque), 37 A (variable torque)
Mounting & Cooling RequirementsWall/cabinet mounting with M8 bolts; 300 mm vertical clearance, 0 mm lateral spacing
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The Siemens 6SE6440-2UD31-5DA1 functions as an AC variable frequency drive designed for driving motors with variable frequency and speed control. This device is rated for supply voltages between 380 V and 480 V AC with a tolerance of ±10%, making it suitable for a variety of industrial applications. It supports a frequency range of 47 to 63 Hz for operational flexibility.

This drive offers a constant torque output capability of 15 kW (20 HP) and can handle variable torque applications with a power rating of 18.5 kW (25 HP). The overload capacities are robust, with constant torque rated at 150% for durations of 60 seconds and 200% for up to 3 seconds. Variable torque ratings allow for 110% capacity for 60 seconds and up to 140% for 3 seconds. This operational flexibility ensures that it can handle demanding situations while maintaining reliability.

The drive's dimensions of 520 mm height, 275 mm width, and 245 mm depth ensure it can be fitted into standard mounting setups, particularly through wall or cabinet mounting using M8 bolts. A vertical clearance of 300 mm is required, although there are no lateral spacing requirements to facilitate mounting in confined spaces.

Regarding control methodologies, it utilizes V/f mode and sensorless flux vector control to enhance motor performance dynamically. The external dynamic braking support requires a minimum resistor value of 28 Ω. Moreover, it features various I/O interfaces that include 6 digital inputs, 2 analog inputs, 3 relay outputs, and 2 analog outputs, allowing for extensive integration within automation systems. The device operates under strict operating temperature conditions of -10°C to +50°C, making it versatile within a range of environments. This drive is ideal for various applications requiring precise motor control combined with robust performance.