KEB 12.F4.087-D489 COMBIVERT F4 Power Board

Technical Specifications

Model:12.F4.087-D489

Brand:KEB

Product type:COMBIVERT F4 inverter T/L power drive board

Power supply:3-phase 380~400Vac,50/60Hz

Control function:Power conversion,IGBT drive,brake chopper circuit,overvoltage/overcurrent/short-circuit protection,power signal sampling,hardware self-diagnosis,fault feedback

Communication:Internal parallel bus with control board

Mounting:Built-in installation inside F4 inverter housing

Operating temperature:-10~50℃（>1000m altitude derating required）

Storage temperature:-20~70℃

Relative humidity:5~95% non-condensing

Max working altitude:2000m

Cooling:Forced air cooling

Weight:1.4kg

Dimension:235mm130mm42mm

Certification:CE

Protection class:IP00 (PCB bare board)

System compatibility

12.F4.087-D489 belongs to KEB COMBIVERT F4 drive system family,matched with F4 series control board and inverter housing.Widely used in woodworking,textile and injection molding high-speed spindle inverter maintenance.This is a discontinued legacy power board for drive equipment maintenance spare replacement.

Function

12.F4.087-D489 serves as KEB COMBIVERT F4 power board.It is the main power conversion unit of F4 spindle inverter.It converts DC bus voltage into 3-phase PWM output to drive high frequency spindle motor.It integrates IGBT driving circuit,current and voltage sampling circuit and brake chopper circuit.It sends power status and fault signal to the control board for protection and alarm.It is the core power component of KEB COMBIVERT F4 high frequency inverter.

Installation

Install 12.F4.087-D489 into COMBIVERT F4 inverter cabinet.Finish bus bar,control signal and terminal wiring according to wiring drawing.Discharge DC bus capacitor for at least 5 minutes before replacement.Check wiring tightness and ventilation before power-on.

Interface

‑DC bus input terminal

‑3-phase motor output terminal(U,V,W)

‑Braking resistor terminal(BR+,BR-)

‑Signal pin header connected to control board

‑Current sampling port

‑Power and fault indicator

Circuit feature

IGBT PWM power conversion circuit,built-in surge suppression and EMC filter design.High frequency stable output,strong anti-interference performance for industrial cabinet environment.

Feature

12.F4.087-D489 is obsolete KEB series spare part.Typical failures include IGBT breakdown,capacitor aging,sampling circuit damage,brake circuit failure.Check PCB circuit and pin connectors before replacement.This board must match corresponding F4 control board and housing,direct substitution without inspection is not recommended.

Diagnostic

When IGBT damage,overcurrent,overvoltage or capacitor fault occurs,the board feeds fault signal to control board,inverter will shut down output and display fault code.

Built‑in function:DC-AC power conversion,IGBT drive,power signal sampling,brake control and hardware protection,used as KEB COMBIVERT F4 series inverter power board spare replacement.

Product Brief

12.F4.087-D489 is KEB old industrial series F4 power board for high-speed spindle inverter repair.Confirm F4 control board model matching before ordering.ESD protection required during handling and installation.