BECKER MB340 Inverter Modules MB340 816-0028-102

Technical Dossier

Product Details And Specifications

BECKER MB340 Series Technical Notes

The BECKER MB340 series is a line of compact frequency inverters engineered for demanding industrial drive applications. Deployed across heavy-process industries including chemical plants, oil refineries, and continuous manufacturing facilities, the MB340 platform occupies a well-established position in the European and global industrial automation market. These units are designed to control three-phase asynchronous motors with precision, offering integrated protection functions, configurable ramp profiles, and fieldbus-ready communication interfaces. The series is particularly prevalent in legacy installations where long equipment lifecycles demand sustained spare parts availability and technical support beyond the original product's active production window.

The Evolution of MB340 Architecture

The MB340 platform was developed as part of BECKER's broader drive technology portfolio, targeting the low-to-medium power range for variable speed control. Early variants in the MB340 family used analog reference signal inputs (0–10 V, 4–20 mA) with basic V/f control topology. As the series matured, successive hardware revisions introduced enhanced EMC filtering, improved IGBT switching stages, and expanded digital I/O configurations to meet evolving EN/IEC standards for industrial drive systems.

The internal architecture is built around a rectifier-DC bus-inverter topology standard to the VSD (Variable Speed Drive) class. Control boards across the MB340 range share a common parameter structure, which simplifies cross-variant commissioning in multi-drive installations. Later production runs incorporated optional fieldbus adapter slots compatible with PROFIBUS-DP and CANopen protocols, extending the series' integration capability into PLC-controlled process lines.

Compatibility considerations are critical for maintenance engineers: control board assemblies and power modules are not universally interchangeable across all MB340 sub-variants. The part number suffix (e.g., 816-0028-102) encodes hardware revision and power rating data. Substitution must be validated against the original unit's nameplate and parameter backup before installation.

As of current market status, the MB340 series is in its mature-to-end-of-life phase. BECKER has transitioned its active drive portfolio to successor platforms. This makes long-term maintenance support — including access to tested, verified spare units — the primary operational concern for facilities still running MB340-based systems.

MB340 Full Catalog & Functionalities (SKU List)

The following SKUs represent documented variants within the BECKER MB340 inverter series, organized by functional category. Each entry reflects a distinct hardware configuration or power rating within the platform.

Inverter Drive Modules (Core VSDs)

• MB340 816-0028-102: Compact frequency inverter module, standard V/f control, integrated EMC filter, digital/analog I/O
• MB340 816-0028-101: Earlier hardware revision of the 816-0028 base unit, pre-EMC filter revision
• MB340 816-0028-103: Revised output stage variant with updated IGBT driver board
• MB340 816-0030-100: Higher power rating variant, extended current output range for larger motor loads
• MB340 816-0030-101: Revision 101 of the 816-0030 power class, updated thermal management
• MB340 816-0032-100: Extended power class module, suitable for 7.5 kW motor applications
• MB340 816-0032-101: Revision 101 with modified control board firmware compatibility
• MB340 816-0024-100: Lower power class entry, 1.5 kW range, single-phase input compatible variant
• MB340 816-0024-101: Revision 101 of the 816-0024 class, updated parameter set structure
• MB340 816-0026-100: Mid-range 2.2 kW class inverter, standard three-phase input configuration
• MB340 816-0026-101: Revision 101, modified braking chopper threshold settings

Communication & Interface Modules

• MB340 816-0050-100: PROFIBUS-DP fieldbus adapter module for MB340 series integration
• MB340 816-0051-100: CANopen communication interface adapter, plug-in format
• MB340 816-0052-100: RS-485 / Modbus RTU serial communication option board

Ancillary & Accessory Modules

• MB340 816-0060-100: External braking resistor assembly, matched impedance for MB340 power classes
• MB340 816-0061-100: Line choke / input reactor, 3% impedance, for harmonic mitigation on MB340 installations

Sourcing Hard-to-Find & Obsolete MB340 Parts

For facilities evaluating migration away from the MB340 platform, DriveKNMS can provide cross-reference data to identify compatible successor drive models that match the original motor and control wiring specifications, reducing retrofit engineering time.

Quality Control for the MB340 Range

The MB340 series presents specific verification challenges due to its age and the prevalence of field-repaired units in the secondary market. DriveKNMS applies a structured test protocol to all MB340 units prior to dispatch:

• Power stage verification: DC bus capacitance measurement, IGBT gate drive signal integrity check, and output phase balance test under resistive load.
• Control board functional test: Parameter upload/download cycle, digital input response verification, analog reference signal linearity check across the full 0–10 V and 4–20 mA input ranges.
• Communication interface test: Where fieldbus adapters are present, protocol handshake and data exchange verification is performed using a reference PLC test bench.
• Thermal cycling: Units are operated through a defined load cycle to confirm thermal management components (heatsink, fan, thermistor) are within specification.
• Visual and mechanical inspection: PCB inspection for corrosion, dry joints, and capacitor condition. Enclosure and connector integrity check.