VLT2840PT4B20SBR0DBF00A00C1 Danfoss VLT 2800 Variable Speed Drive

Product Overview

The 178B8583 (VLT2840PT4B20SBR0DBF00A00C1) is a versatile and compact frequency converter from the legacy Danfoss VLT 2800 series. Rated for 4.0 kW (5.5 HP) at 380-480V, this drive was specifically engineered to provide high-performance motor control in space-constrained industrial environments. Known for its side-by-side mounting capability and integrated cooling fans, the 178B8583 has been a cornerstone in automated production lines, packaging machinery, and material handling systems. Although this specific model has reached the end of its production lifecycle, it remains a critical component for maintaining existing infrastructure. Note that for new installations or complete system overhauls, Danfoss recommends the 134U3013 (VLT Midi Drive FC 280) as the official high-performance replacement.

Technical Configuration

The VLT 2840 architecture focuses on maximizing torque and precision while maintaining a small physical footprint.

• Power Capability: Designed for 4.0 kW three-phase motor loads, delivering robust speed control for a wide variety of asynchronous motors.

• Mains Voltage Range: Supports a broad input window of 380-480V (+/- 10 percent) at 50/60Hz, making it adaptable to global power grids and varying industrial supply conditions.

• Enclosure Design: Features an IP20 rated chassis (B20), intended for installation within protected electrical control cabinets.

• Dynamic Braking: Includes an integrated brake chopper, allowing for precise control during rapid deceleration and high-inertia stops.

• Legacy Reliability: Built with the classic VLT user interface, allowing for rapid parameter cloning and consistent performance in environments with significant electrical noise.

Technical Specifications

Technical FAQs

Is the 178B8583 still available for new projects?

No, production for this specific model has been stopped. It is primarily available as refurbished stock or for emergency replacement. For all new engineering projects, the 134U3013 (FC-280P4K0T4E20H2BXCXXXSXXXXAX) should be used, as it offers modern communication protocols and higher energy efficiency.

What are the primary differences between this legacy drive and the FC 280 replacement?

While the power ratings are identical, the FC 280 replacement features an upgraded processor, improved thermal management, and enhanced functional safety (STO). The physical dimensions may vary slightly, so verify mounting hole patterns before replacing a 178B8583 in an existing panel.

Does this drive require a separate RFI filter?

The VLT 2800 series was available in various configurations. This specific model should be checked against the model code for integrated filter options; however, in high-precision environments, external RFI filters are often recommended to ensure compliance with modern EMC standards.

Engineering & Installation Guide

• Cooling Requirements: The VLT 2840 generates heat during full-load operation. Even though the VLT 2800 series supports side-by-side mounting, ensure that the cabinet's internal air temperature does not exceed 45 deg C. Maintain clear vertical pathways for the bottom-to-top airflow generated by the internal cooling fan.

• Brake Resistor Sizing: For applications involving vertical loads or high-inertia flywheels, an external brake resistor must be connected to the R+ and R- terminals. Failure to install a correctly sized resistor when the brake chopper is active can result in DC-link overvoltage trips.

• Replacement Strategy: When migrating from the 178B8583 to the 134U3013 (FC 280), do not attempt to directly copy parameter numbers, as the menu structures differ. Use the Danfoss conversion guide to map old parameters to the new VLT Midi Drive settings to ensure identical motor performance.