SIEB & MEYER 26.50.39BC Servo Power Module

Module Feature

SIEB & MEYER 26.50.39BC is a rack plug-in servo power module. It works with SIEB & MEYER axis control boards and rack DC bus power supply. It uses IGBT switching technology to convert DC bus into variable frequency three-phase AC power to drive servo motors. It integrates current sampling and multi-level fault detection. Built-in overvoltage, undervoltage, overcurrent, short-circuit and overtemperature protection. Compact rack plug-in design with good EMC performance. Widely used in CNC machine tools, semiconductor processing equipment and high-precision automation production lines.

Working principle

The module receives DC bus voltage from rack power supply unit. It accepts control reference signals from matched axis control board, and outputs variable amplitude & frequency three-phase AC to drive servo motor. It continuously monitors output current and internal temperature. When fault condition is detected, the module immediately turns off IGBT output and sends fault signal back to control board to trigger safety interlock.

Onboard components

IGBT power stack, DC bus capacitor bank, current sampling sensors, gate drive circuit, temperature detector, fault logic circuit, power terminal block, backplane gold finger connector, LED status array.

LED indicators

Front panel LED indicators for DC bus ready, module power, servo enable and fault code display.

Hardware self-diagnosis

Visual inspection of module housing, power terminals and backplane pins; DC bus voltage test; motor cable continuity & insulation test; read LED fault codes; inspect cooling fan and heat sink for dust accumulation.

Programming software

SIEB & MEYER commissioning software for drive parameter setup, status monitoring and fault log reading.

Electrical & Process Parameters

Model: 26.50.39BC Input voltage: DC bus from rack PSU Control mode: Position / Speed / Torque (controlled by matching axis board) Command interface: Backplane internal bus Cooling: Forced air cooling Protection: Overvoltage, undervoltage, overcurrent, short circuit, overload, overtemperature Mounting: Rack plug-in mounting

Mechanical & Structure

Mounting: Rack plug-in mounting Protection class: IP20

Environmental

Operating temperature: 0℃ ~ +50℃ Ambient humidity: 5~95% non-condensing Certification: CE compliant Status: SIEB & MEYER servo power stage module

System compatibility

Compatible with SIEB & MEYER series axis control boards and rack power supply units, forms complete single-axis servo drive system for CNC and semiconductor equipment.

Function

26.50.39BC power module manufactured by SIEB & MEYER. It converts DC bus to variable frequency three-phase power to drive servo motor according to control board commands. Faults such as phase short circuit, overcurrent and overheat will disable power output and trigger safety alarm. It is the power execution unit of SIEB & MEYER rack servo drive system.

Installation

Follow lockout/tagout safety procedure before installation. Cut off all rack power completely. Insert module into designated rack slot and lock handle, confirm reliable backplane contact. Wire three-phase motor power cable and ground terminal. Download parameters and test motor operation via SIEB & MEYER commissioning software before formal operation.

Interface

DC bus input terminal, three-phase motor power output terminal, backplane control bus connector, fault signal output terminal of 26.50.39BC.

Diagnostic

No power LED: Missing DC bus supply or blown internal fuse. Module not ready: Backplane poor contact, pre-charge failure or hardware defect. Overcurrent alarm: Motor winding short, damaged power cable or IGBT breakdown. Overheat alarm: Fan failure, clogged heat sink or continuous heavy load. Bus overvoltage: Excessive regenerative braking energy or faulty brake resistor.

Product Brief

26.50.39BC SIEB & MEYER rack plug-in servo power module,DC bus input,IGBT power stage,matching SIEB & MEYER axis control boards,for CNC and semiconductor high precision servo motion control.