SMTBD1/1A-220/30 - Speed amplifier Module - INFRANOR

Variable speed drive INFRANOR SMTBD1/1A-220/30, SMT digital servo drive

The reference SMTBD1/1A-220/30 is part of the INFRANOR SMT digital servo drive series, engineered for precise velocity and torque control of AC brushless sinusoidal servo motors in industrial automation. The SMT series addresses maintenance and retrofit needs where stable speed control, fast dynamics, and deterministic feedback are required. It is relevant for OEMs and maintenance teams dealing with installed bases that must remain operational despite component obsolescence. The module combines an IGBT power stage with a DSP-based control board and supports encoder feedback, analog setpoints, and serial communication. Its design enables consistent servo performance, simplified integration with PLC or CNC controllers, and predictable commissioning thanks to auto-tuning and structured regulation loops.

Technical specifications

• Manufacturer reference: SMTBD1/1A-220/30
• Series: SMT digital servo drive
• Manufacturer: INFRANOR
• Type: Digital servo variable speed drive for AC brushless motors
• Input supply: 220 VAC nominal
• DC bus: 310 VDC nominal, operating range 270 to 340 VDC
• Maximum output current: 30 A
• Motor terminal voltage: 200 Vrms (phase to phase)
• Control loops: Digital speed loop, 500 µs sampling, P, PI, and PI2 regulators
• Switching frequency: 10 kHz PWM
• Setpoint interfaces: ±10 V analog speed and current reference, 12-bit standard, 16-bit optional
• Monitoring outputs: Analog outputs for drive and process variables
• Digital I/O: Logic inputs for enable or disable, limit switches, speed selection and control
• Feedback: Incremental encoder supported, approximately 1,000 to 1,000,000 ppr
• Communication: RS-232 standard, RS-422 or RS-485 optional
• Control board: DSP-based regulation and processing
• Power stage: IGBT transistors
• Auto-tuning: Three tuning bands and three filters, offset compensation available
• Motion functions: Interpolated position mode, homing mode, profile velocity mode, safe low-speed mode
• Form factor: 6U double Eurocard
• Power rating: Application dependent, select by motor and up to 30 A current envelope

SMT range overview

The INFRANOR SMT family is intended for high-performance servo control where deterministic speed regulation and feedback integrity are critical. Built around digital regulation blocks and a PWM IGBT stage, SMT drives remain a robust choice for modernizations and service interventions on legacy machines. Their configuration flexibility and encoder compatibility help preserve machine capability while minimizing reengineering during replacement or repair.

• SMT speed control profile: Velocity loop with encoder feedback, analog setpoint via ±10 V, suitable for precise speed holding, torque limiting, and coordinated line control under a PLC or CNC supervisor.
• SMT motion profile: When the application requires positioning, the drive supports interpolated position, homing, and profile velocity modes, enabling axis control in synchronization with an upper-level motion controller.

The SMTBD1/1A-220/30 can be deployed in either profile depending on parameterization. In many retrofits it is used as a speed drive with encoder feedback and analog setpoint, delivering stable dynamics and reproducible tuning across a wide motor speed range.

Industrial applications

This variable speed drive integrates into numerous industrial contexts requiring controlled acceleration, stable velocity, and coordinated multi-axis behavior. The following examples illustrate typical use cases where encoder-based speed regulation and analog command interfaces simplify integration while maintaining deterministic control quality.

• Machine tool and CNC auxiliaries: Feed or auxiliary axes needing tight speed tolerance and predictable torque response under CNC supervision.
• Packaging and converting lines: Conveyor sections, infeed and outfeed rollers, web tension control with smooth ramping and stable steady-state speed.
• Material handling: Hoists, shuttles and transfer units where enable and limit signals, together with safe low-speed, contribute to controlled motion phases.
• Textile and winding processes: Reels and winders leveraging speed loop accuracy and encoder feedback for consistent linear velocity and repeatable winding quality.
• Test benches and lab automation: Controlled speed sweeps and steady-state runs for characterizing mechanical systems or components.

Integration and communication

The SMTBD1/1A-220/30 interfaces efficiently with PLCs and industrial controllers using ±10 V analog commands for speed or current reference, logic I/O for enable, limits and speed selection, and a serial RS-232 link for parameter access. Optional RS-422 or RS-485 extends distance or noise immunity where required. Encoder support, combined with auto-tuning and selectable P, PI, or PI2 regulation, reduces commissioning time and helps achieve stable control across a wide operating range. The 10 kHz PWM and 500 µs sampling provide a predictable regulation bandwidth suited to coordinated lines and servo applications.

For system design, observe motor compatibility in terms of voltage and current, ensure proper shielding and grounding of encoder and power cables, and consider EMC filtering in accordance with the installation environment. Thermal management and enclosure selection should follow the drive's dissipation profile and ambient conditions. Power dimensioning is selected by motor ratings within the 30 A current envelope. Parameter backup and structured documentation facilitate maintenance operations over the equipment life cycle.

Availability and warranty

Standard Exchange Industry supplies the INFRANOR SMTBD1/1A-220/30 as reconditioned supply or via standard exchange, and performs industrial repair with functional testing on dedicated benches. Shipment is organized within 24 to 72 hours to more than 120 countries, aligning with maintenance schedules and unplanned downtime constraints. Depending on the chosen service, products are covered by a warranty window defined by SEI policies. Our technical team can assist in identifying the correct SMT configuration for your motor and feedback, evaluate retrofit risks, and propose a form-fit functional replacement strategy to restore production under controlled conditions.