GE BK698CPA15B0 Module | 200-240VAC Input CNC System Power Supply
Description
The GE BK698CPA15B0is a high-performance Switched-Mode Power Supply(SMPS)unit developed by GE Fanuc(now part of FANUC Corporation)for its CNC systems.It is the critical power conversion component within the control cabinet of machine tools,providing clean,stable,and isolated DC power to the CNC controller,servo drives,and I/O modules.This unit ensures the reliable”heartbeat”of the entire numerical control system,converting incoming mains voltage to the precise low-voltage DC required for sensitive digital electronics.
Application Scenarios
Inside the control cabinet of a high-speed 5-axis machining center,dozens of servo drives,a powerful CNC computer,and hundreds of sensors demand a flawless and steady power source.Any fluctuation,ripple,or interruption in this power can lead to servo drift,communication errors,data loss,or an immediate machine halt—costing thousands in scrap and downtime.The GE BK698CPA15B0is the foundational component that prevents this.It takes the often”dirty”200-240VAC shop floor power,filters out surges and noise,and converts it into the pristine+24VDC and other voltages needed by the Fanuc Series 0i control system.When this unit fails,the entire machine is paralyzed.By providing robust,regulated power with multiple protection features,the BK698CPA15B0directly addresses the core industrial need for maximum machine uptime and processing consistency,forming the non-negotiable foundation for precision manufacturing in automotive,aerospace,and mold-making.
Parameter
Main Parameters
Value/Description
Product Model
BK698CPA15B0(Often corresponds to FANUC part A06B-6110-H026#H550)
Manufacturer
GE Fanuc/FANUC
Product Category
Switched-Mode Power Supply Unit(PSU)
Input Voltage
200-240 VAC,1-Phase,50/60 Hz
Output Voltages
+24VDC(main logic/servo enable),+5VDC,±15VDC,+3.3VDC(for specific system needs)
Output Power
Typically 550W(confirm with specific label;e.g.,550W for H026#H550)
Protections
Overcurrent(OCP),Overvoltage(OVP),Over Temperature(OTP),Short Circuit(SCP)
Cooling
Forced air cooling via internal fan
Status Indicators
LED indicators for Power Good(PWR),Alarm(ALM)
Communication
May provide a system-ready(SRDY)signal to the CNC CPU
Mounting
Designed for chassis/cabinet mounting with screw terminals for I/O connections
Key Feature
Designed for 24/7 operation in industrial environments with high electrical noise.
Technical Principles and Innovative Values
The GE BK698CPA15B0is engineered to meet the brutal reliability standards of industrial machine tools,employing a robust switched-mode topology for high efficiency and power density.
Innovation Point 1:Multi-Rail,High-Current+24VDC Output:Unlike simple single-output PSUs,the BK698CPA15B0is tailored for CNC systems.Its primary+24VDC output is designed to deliver high inrush and steady-state current to simultaneously power the servo amplifier control circuits,I/O modules,relays,and fans.This dedicated,high-power rail ensures servo drives can enable and hold position without voltage sag,which is critical for safety and accuracy.
Innovation Point 2:Comprehensive Protection&Diagnostic Signaling:The unit incorporates a full suite of hardware protections(OVP,OCP,OTP,SCP)that act within microseconds to shut down the output safely,preventing a faulty power supply from damaging the far more expensive CNC controller or drives.Crucially,it provides clear diagnostic feedback via LED alarms and a System Ready(SRDY)signal,allowing the CNC to perform a controlled startup and log power-related faults,drastically reducing troubleshooting time.
Innovation Point 3:Industrial-Grade Noise Immunity and Stability:Machine shops are electrically hostile with welders,large motors,and inductive loads causing spikes and noise.The BK698CPA15B0features advanced input filtering,power factor correction(PFC),and tightly regulated feedback loops.This ensures the sensitive digital logic of the CNC(running on the+5V and+3.3V rails)and the analog reference circuits(using±15V)remain completely stable,preventing memory errors or erratic servo behavior caused by a”noisy”power source.
Innovation Point 4:The unit operates on a high-frequency switching principle for efficiency.It rectifies and filters the AC input,uses a high-frequency inverter(typically tens of kHz)to chop this DC,steps the voltage down via a compact transformer,and then rectifies and filters it again to produce the clean,isolated DC outputs.This method,combined with robust industrial components,allows for a compact,cool-running,and highly reliable design.
Application Cases and Industry Value
Case Study:Eliminating Random Faults in a High-Production Automotive Component Line
A major automotive supplier’s transmission component line,utilizing 15 identical CNC lathes with Fanuc 0i-TD controls,began experiencing unexplained”SV0040″(servo disconnect)and”SRVO-062″(encoder checksum error)alarms on several machines.These random faults caused unplanned stops,scrapped high-value parts,and were impossible to replicate consistently.After exhausting checks on servo motors,cables,and parameters,the maintenance team,with external support,focused on the power supply.Voltage checks revealed slight,intermittent sag on the+24VDC rail from the aging GE BK698CPA15B0units during simultaneous tool changes and axis moves.
The Process&Improvement:The team proactively replaced the GE BK698CPA15B0power supplies on the three most problematic machines with new,certified units.The random servo alarms disappeared completely.Monitoring confirmed the new PSUs maintained rock-solid voltage even under peak load.This led to a planned preventative replacement program for the remaining units.The result was a dramatic increase in Overall Equipment Effectiveness(OEE)for the line.Scrap due to control faults dropped to zero,and maintenance hours spent on”ghost”troubleshooting were redirected.The plant engineer reported,”We learned the hard way that the power supply isn’t just a commodity part.A failing BK698CPA15B0doesn’t always die completely;it can degrade and cause the most confusing,expensive intermittent faults.Replacing it is now a key part of our predictive maintenance schedule.”
Related Product Combination Solutions
The GE BK698CPA15B0is the core power hub for a Fanuc 0i system.Its reliable operation is essential for the functionality of all connected components:
A06B-6114-H030:The associated Power Supply Regeneration Unit for the Axis Control block.While the BK698CPA15B0powers the control logic,this unit manages the high-power bus for the servo and spindle drives.
A06B-6117-H030:The Servo Amplifier(e.g.,βi series).It receives control power and enable signals from the BK698CPA15B0’s+24VDC rail.A weak PSU will directly impact amplifier performance and fault reporting.
A20B-8100-0770:The main CPU board of the Fanuc Series 0i-Model D.It is powered by the+5V,+3.3V,and±15V outputs from the BK698CPA15B0.Any noise or drift here can cause CPU resets or memory corruption.
A20B-3300-0270:I/O Module.All digital and analog I/O cards are powered by the+24VDC from the PSU,making it essential for reliable sensor reading and actuator control.
BK698CHA10A:A different specification power supply unit(e.g.,for 3-phase 400VAC input).Understanding the correct input voltage variant(BK698CPA15B0for 1-phase 200V)is crucial for replacement.
Fanuc Servo Motors(e.g.,β8/β12):While the motor power comes from the main amplifier,the motor’s absolute encoder receives its power(typically+5V)derived from the system’s clean power,ultimately sourced from the PSU.
CRT/LCD Unit:The display and operator panel are also powered by the main system PSU,making its stability important for the HMI.
Installation,Maintenance,and Full-Cycle Support
Installation of the GE BK698CPA15B0is a critical task that must be performed with the machine completely powered down and locked out(LOTO).The unit is mounted securely in the control cabinet,and all input(AC mains)and output(DC to various boards)connections must be made precisely according to the machine’s electrical diagram.Particular attention must be paid to the tightness of terminals and the correct routing/connection of the System Ready(SRDY)signal cable,as a missing signal will prevent the CNC from booting.Ensuring adequate clearance for the unit’s cooling fan is essential for long-term reliability.
Routine maintenance involves keeping the air intake and exhaust vents clean and free of dust,which is the primary cause of overheating and premature failure.Periodically checking the output voltages under load with a true-RMS multimeter can reveal early signs of capacitor wear.The most definitive maintenance action is proactive replacement based on service hours or as part of a rebuild,as electrolytic capacitors degrade over time.
We provide full-cycle support for the GE BK698CPA15B0.Every unit we supply is tested under load to verify all output voltages are within specification,protections are functional,and the SRDY signal operates correctly.We offer technical guidance on compatibility and installation.Our commitment is to deliver a power supply that restores your CNC system to its factory-grade reliability,backed by a warranty and expert support.Don’t let a failing power supply be the hidden cause of your production losses.Contact us for a reliable replacement solution and keep your machine tools running at peak performance.
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