MP/DR-100A - Power Supply Module - INFRANOR

INFRANOR MP/DR-100A power supply module - SMT-100 series

The MP/DR-100A is the dedicated power supply module for INFRANOR’s SMT-100 / SMT-100D servo amplifier series. Designed for multi-axis motion systems, it centralizes AC to DC conversion, provides a stable DC bus to up to six axes, and generates the auxiliary logic voltages required by the rack and drives. This unit addresses a recurrent maintenance challenge in legacy and active installations, namely ensuring a clean and well-regulated DC bus during dynamic machine cycles, including motor braking. By integrating a shunt regulation function and voltage supervision, the MP/DR-100A protects the downstream servo amplifiers from bus overvoltage and undervoltage conditions. Its compatibility with 1, 4 or 6-axis racks allows straightforward replacement in existing cabinets and simplifies expansions or retrofits. For maintenance engineers and system integrators, it offers a technically sound, time-efficient path to restore axis power, minimize downtime and standardize spares across SMT-100 platforms.

Technical specifications

• Manufacturer: INFRANOR
• Reference: MP/DR-100A
• Series compatibility: SMT-100 and SMT-100D servo amplifier racks, up to 6 axes
• Type: Power supply module for multi-axis racks
• AC input: 220 VAC single-phase
• DC bus output: Rectified and filtered bus, 40 VDC < Ubus < 130 VDC
• Bus energy storage: 1000 µF bus capacitance
• Logic supplies: +15 V up to 800 mA, −15 V up to 350 mA, floating +15 V up to 600 mA
• Braking energy control: Integrated shunt regulator for motor deceleration cycles
• Protections: DC bus supervision with overvoltage and undervoltage thresholds, 30 V < Up < 170 V
• Rack options: Compatible with 1-axis, 4-axis and 6-axis distributions for power and logic
• Intended function: Centralized supply of DC bus and logic rails to SMT-100/SMT-100D amplifiers

Overview of the SMT-100 series

The SMT-100 family from INFRANOR is a modular multi-axis servo platform deployed in numerous motion systems where compact architecture and coordinated axes are required. In this architecture, the MP/DR-100A assumes the role of shared power front-end, stabilizing the DC link that feeds each amplifier card while providing the auxiliary logic rails for control electronics. This separation between power conversion and axis control simplifies thermal management, improves serviceability and reduces duplicated components across multiple drives. It also supports predictable braking behavior by absorbing regenerative energy through its shunt regulation, which is essential during rapid decelerations, emergency stops or load reversals. For operators maintaining established motion lines, the SMT-100 concept enables incremental upgrade paths and straightforward replacement of modules with minimal wiring changes, ensuring process continuity and reduced commissioning time after maintenance.

• Centralized DC bus: One power supply module provides a common, monitored DC link to all axes in the rack.
• Integrated logic rails: On-board generation of symmetric ±15 V and floating +15 V for drive electronics and rack distribution.
• Modular scalability: Racks available for 1, 4 or 6 axes, facilitating phased machine expansions and standardized spares.

Within this framework, the MP/DR-100A ensures that the servo amplifiers operate inside a controlled electrical envelope, limiting stress on components and supporting consistent axis performance across the life of the installation.

Industrial applications

This power topology is used across a wide range of motion-centric applications where multiple axes share a common DC bus. By providing a clean, supervised bus and the necessary logic supplies, the MP/DR-100A supports stable operation of SMT-100/SMT-100D amplifiers in processes requiring frequent acceleration and deceleration. Typical environments include factory automation and machinery where reliability under cyclic loads is a priority.

• Machine tools and CNC auxiliaries: Feed axes, tool changers and positioning units requiring synchronized motion.
• Packaging and converting: Register control, infeed and outfeed axes, web handling with controlled tension.
• Material handling: Pick-and-place gantries, indexing tables and multi-axis conveyors.
• Assembly and robotics: Cartesian stages and coordinated motion cells where regenerative braking is frequent.
• Textile and printing: Multi-roll sections with shared DC bus dynamics during speed ramps.

Integration and communication

As a power supply module, the MP/DR-100A focuses on electrical distribution rather than fieldbus communication. Integration is therefore centered on correct AC input wiring, protective earthing, and DC bus and logic distribution to the rack backplane. Commissioning best practices include verifying mains conformity to 220 VAC single-phase specifications, checking polarity and insulation of DC bus connections, and validating the integrity of the rack distribution for the ±15 V and floating +15 V rails. The shunt regulation circuitry should be sized and thermally managed according to the application’s braking profile, ensuring proper dissipation of regenerative energy during fast stops. Where external braking resistors or additional protective devices are used, they must be selected in line with the expected kinetic energy and duty cycle of the machine. The protection thresholds on the DC bus provide early detection of abnormal conditions, supporting predictive maintenance and limiting stress on SMT-100/SMT-100D amplifiers.

For replacements in existing cabinets, mechanical and connector compatibility with 1, 4 or 6-axis racks streamlines the swap procedure. A methodical start-up sequence, including bus pre-charge checks, verification of logic rail loads and observation of bus voltage stability through acceleration and braking cycles, helps validate proper system behavior before returning the machine to production.

Availability and warranty

The INFRANOR MP/DR-100A is available from Standard Exchange Industry in multiple service modes adapted to industrial maintenance constraints: supply of reconditioned units tested on load bench, standard exchange to minimize machine downtime, and repair service when conservation of the installed base is preferred. Shipments are organized within 24 to 72 hours to more than 120 countries, enabling rapid restoration of critical production assets. Each service option is covered by a warranty window aligned with our testing protocols. Our technical team supports identification of the correct rack configuration and validates compatibility with SMT-100 or SMT-100D amplifier cards. If your line is stopped due to a DC bus fault, voltage instability or braking overvoltage trips, our engineers can assist with root-cause guidance and propose a replacement or repair pathway consistent with your maintenance strategy.