131L9871
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The 131L9871 is a robust drive unit with an 18.5 kW power rating and IP20 enclosure. Manufactured by Danfoss as part of the VLT FC 101 HVAC Basic Drives series, it operates on a 3-phase 380-480 V main power supply. This unit supports an output frequency range of 0-400 Hz, weighs 9.5 kg, and measures 150 x 334 x 255 mm.
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Product Description:
The 131L9871 Frequency Converter is a high-performance drive solution for applications requiring up to 18.5 kW of power. It is designed for 3 phase 200 – 240 V AC systems. It offers reliable control with advanced electrical features and protection. This model is perfect for a wide range of industrial processes.
The 131L9871 frequency converter from Danfoss offers a typical shaft output of 18.5 kW and 25.0 hp with an enclosure protection rating of IP20 which is suitable for indoor use. The unit supports a maximum cable size of 35 mm² (AWG 2) for both mains and motor terminals. The frequency converter can provide continuous output current ranging from 59.4 A at + 40 °C (+ 104 °F) for 3 x 200 - 240 V systems with an intermittent output current reaching up to 74.8 A. The maximum input current is 42.0 A for continuous operation and 52.7 A under intermittent load conditions that ensures high efficiency operation even under varying loads.
The control card of the 131L9871 frequency converter includes 10 V DC output with a maximum load of 25 mA. It also provides a 24 V DC output with a higher load capacity of 80 mA that allows for additional control and monitoring functions. The converter also supports digital outputs with terminals 27, 29, 42 and 45. The digital outputs from terminals 27 and 29 deliver up to 40 mA with a voltage range of 0 to 24 V. The terminals 42 and 45 are designed to provide a maximum output current of 20 mA at 17 V with a load capacity of 1 kΩ that further expanding the unit's flexibility for complex control systems.
Frequently Asked Questions about 131L9871:
Q: How does the 131L9871 frequency converter handle intermittent peak load conditions in low-voltage industrial systems?
A: It maintains output stability with short-term current spikes up to 74.8 A during heavy load transitions. This ensures reliable motor performance without thermal or electrical shutdowns under peak demand.
Q: Can the Danfoss 131L9871 converter integrate with monitoring systems that require low-power sensor feedback?
A: It provides isolated 10 V and 24 V DC outputs that support external control electronics. These allow safe powering of signal converters, sensors, or feedback modules without extra supply hardware.
Q: What output performance can be expected from the 131L9871 model under full-load at elevated ambient temperatures?
A: It delivers continuous output current while operating efficiently at 40 °C ambient. This supports long-duration industrial cycles even in thermally stressed panel environments.
Q: How flexible is the 131L9871 frequency converter in managing digital signal interfacing for complex automation?
A: It supports multiple digital outputs across terminals with distinct current and voltage thresholds. These enable seamless integration into PLCs, relays, or custom logic circuits.
Q: Is the 131L9871 frequency converter suited for industrial setups with limited wiring space or terminal clearance?
A: It accommodates cable sizes up to 35 mm² for both motor and mains terminals. This enables secure, high-current connections without exceeding space constraints in compact panels.
