OTC DAIHEN Robot Control Cabinet and Drive System Core Spare Parts Overview
The high dynamic response and stable operation of industrial welding robots highly depend on the massive and complex electrical control system inside the control cabinet. Whether it is the AX series, FD11, or the mainstream FD19 control cabinet, its internal power supply unit, IPM inverter drive module, main control logic CPU board, and teach pendant human-machine interaction components are all core parts that determine the utilization rate of the entire station. After being subjected to high temperatures, dust, and high-load operations in the workshop for a long time, electrical components often experience electrical faults due to thermal fatigue or metal spatter dust accumulation.
To assist factory maintenance engineers and procurement departments in realizing rapid retrieval of components, we have sorted out the internal general spare parts list of the OTC welding robot control system. The model range on this page covers L21720A00 to L6300E00. This range mainly integrates the core control cabinet’s Power and Filter Units (e.g., L21720A00, L21721C00), IPM Servo Drive Components (e.g., L21730A00, L23430A00), high-fidelity Shielded Main Control Cables (L22091D / L22203D series), and the new generation FD19 teach pendant’s LCD Screen and Touch Membrane Components (e.g., L23700T00, L23712G00) and other precision control spare parts.
Inspection and Fault Prevention Suggestions for Control Cabinet Core Electrical Spare Parts
- IPM Inverter Drive Modules and Capacitor Boards (e.g., L21730A00, L23430N00): The IPM (Intelligent Power Module) is responsible for directly driving the servo motors of each axis. The cooling fans (e.g., L23423F00) below the drive unit should be cleaned regularly to prevent control cabinet overheating or axis overload alarms caused by poor heat dissipation.
- Main Control CPU Boards and System Data Holding Cards (e.g., L22660C00, L23400C00): The control board is the core control center of the robot. When doing workshop dust cleaning, never plug or unplug the motherboard or CFAST/CF data cards while the power is on. Strict data backups must be made before replacing any system boards.
- Teach Pendant Human-Machine Interaction Consumables (e.g., L23700T00, L23712G00): The teach pendant (TP) is a high-frequency contact device. Its membrane keys, touch panel, and liquid crystal display components are highly susceptible to failure due to bumps, heavy pressure, or oil erosion. It is recommended to replace the screen protector regularly and keep standard hooks and membrane components ready to cope with sudden damage.
| Part Model | Part Name | Technical Notes |
|---|---|---|
| L21720A00 | Power Unit | 48Q10576 Core Power Supply Module |
| L21721A00 | Power Unit | 48E00264 Voltage Stabilization Unit |
| L21721C00 | Filter Circuit Board | Power Input Filter Anti-Interference |
| L21722A00 | Large Capacity Power Supply Device | L21722A00 Specification |
| L21730A00 | IPM Drive Unit | L21730A00 Precision Servo Inverter Module |
| L21730A00-R | IPM Drive Unit | Original Factory Rotational Replacement Part |
| L21730V00 | Printed Circuit Board | L21730V00 Control Board |
| L21730W00 | Printed Circuit Board | L21730W00 Control Board |
| L21730X00 | Printed Circuit Board | L21730X00 Control Board |
| L21731A00 | Drive Unit | Adapts to B4L/V6L/V20 Robot |
| L21732A00 | IPM Servo Assembly | Drive Core Component |
| L21733P00 | Printed Circuit Board | W-L02604 Dedicated Board |
| L21734A00 | IPM Drive Unit | Inverter Drive Module |
| L21735A00 | IPM Servo Assembly | L21735A00 Specification |
| L21750R00 | Cable Assembly | Electrical Wiring Inside the Cabinet |
| L21750S00 | Cable Assembly | Electrical Wiring Inside the Cabinet |
| L21750V00 | Cable Assembly | Electrical Wiring Inside the Cabinet |
| L21751W00 | Drive Board | System Additional External Axis Dedicated Board |
| L21752D01 | Spacer (Iron) | 66J42860 Fastener |
| L21752D02 | Spacer (Aluminum) | 66J42859 Fastener |
| L21752D03 | Spacer (Aluminum) | 66J42856 Fastener |
| L21752W00 | Drive Board | 48D01624 Interface Drive |
| L21761F00 | Cable Assembly | Internal Signal Wire Harness |
| L21762F00 | Cable Assembly | Internal Signal Wire Harness |
| L21766C00 | Shorting Plug | Setting/Closed-loop Jumper |
| L21767A00 | Switching Terminal Block | 47B10001 Wiring Block |
| L21782C00 | Circuit Board | Internal Interface Board |
| L21782C00-R | Circuit Board | Interface Board Rotational Part |
| L21960C00 | Relay | Safety Control Relay |
| L21971A00 | High Voltage Unit | High Voltage Power Distribution Module |
| L22071A00 | CPU Board | System Main Control Core Board |
| L22074C00 | Arc Board | Model upgraded and changed to L23124A00 |
| L22091C00 | FD Robot CN1 Cable | Main Control Shielded Signal Cable |
| L22091D00 | Control Cable 1 (10m) | FDRB-1010 Standard 10-Meter Relay Line |
| L22091E00 | Control Cable 1 (15m) | FDRB-1015 Extended 15-Meter Relay Line |
| L22092C00 | CN2 Cable | Main Control Cable Feedback Line |
| L22092D00 | Control Cable 3 (10m) | FDRB-1010 Feedback Relay Line |
| L22092E00 | Control Cable 3 (15m) | FDRB-1015 Feedback Relay Line |
| L22165C00 | Control Cable (5m) | Short Distance Main Control Signal Cable |
| L22166B00 | Anti-Collision Sensor Cable | L22166B00C Safety Sensing Line |
| L22203C00-1 | Control Cable 2 | Core Control Wire Harness |
| L22203D00 | Control Cable (10m) | Standard 10-Meter Control Cable |
| L22209B00 | Relay Cable (Motor) | Servo Power Relay Cable |
| L22209C00 | Relay Cable (Encoder) | Multi-Layer Shielded High Fidelity Feedback Line |
| L22254A00 | Backplane Board | L22254A00 Back Connection Board |
| L22254C00 | Printed Circuit Board | W-L02589 Extension Board |
| L22255A00 | Relay | 48D00008 Control Cabinet Relay |
| L22255C00 | Extension Relay Circuit Board | Safety/Circuit Extension Board |
| L22266B00 | Voltage Detection Line | High Precision Voltage Feedback Sampling Line |
| L22276U00 | CF Card | System Firmware and Program Keeping Memory Card |
| L22289A00 | Ethernet Interface Board | Network Communication Remote Centralized Monitoring Board |
| L22342F00 | Plastic Connector | Wire Harness Protection Locking Part |
| L22350A00 | Solenoid Valve Power Supply Unit | Dedicated Power Supply for External Gas Circuit Control |
| L22351C00 | Circuit Board | Internal Auxiliary Function Board |
| L22377B00 | Coordination Cable | Multi-Robot Coordination Linkage Relay Cable |
| L22377F00 | Coordination Cable | Dual-Machine Linkage Synchronous Communication Shielded Line |
| L22385F00 | Circuit Board | 48D00006 Dedicated Logic Board |
| L22440A00 | Interface Board | For AX Robot Paired With New WB Welder Power Supply |
| L22449A00 | Teach Pendant Conversion Component | TP Interface Conversion Assembly |
| L22560C00 | Detection Cable (5m) | High Elastomer Anti-Folding Detection Shielded Line |
| L22654B00 | Control Cable (5m) | – |
| L22660B08 | USB Port Cover | Wireless Teach Pendant Interface Rubber Protective Plug |
| L22660B15 | Charging Terminal Sleeve | Teach Pendant Built-in Lithium Battery Charging Base Protective Sleeve |
| L22660C00 | CPU Board | Wireless Control Core CPU Board |
| L22660D00 | Wireless Teach Pendant Circuit Board | WiTP Internal Wireless Transmitter and Receiver Logic Board |
| L22660J00 | Enable Switch Assembly | Teach Pendant Rear 3-Position Enable Safety Switch (SW) |
| L22660L00 | Emergency Stop Switch Assembly | Teach Pendant Front Core Emergency Stop Red Button Key |
| L22660M00 | Rotary Switch Assembly | Speed Tuning/Mode Switching Dial Knob |
| L22660V00 | Cable (CNTP) | Teach Pendant Internal Cable Set |
| L22680A00 | Receiver (WiTP) | Wireless Teach Pendant Dedicated Control Cabinet End Receiver Box |
| L22680E00 | Receiver Assembly Circuit Board | Receiving Terminal Demodulation Board |
| L22688B00 | Encoder Cable 8M | 8-Meter High Flexibility Motor Position Line |
| L22689B00 | Ethernet Cable (5m) | Industrial Grade Twisted Pair Cat 5 Communication Line |
| L22719E00 | Charging Cable | Teach Pendant Base Power Supply Line |
| L22779B00 | Wire Draw Machine Control Cable | Master-Slave Push-Pull Wire System Dedicated Linkage Control Line |
| L22779D00 | Control Cable | – |
| L22779E00 | Buffer Encoder Cable | Active Welding Wire Buffer Bin Position Feedback Line |
| L22779G00 | Motor Relay Cable 1.6m | Wire Feeder Servo Motor Extension Line |
| L22779H00 | Encoder Relay Cable 1.6m | Wire Feeder Encoder Feedback Extension Line |
| L22780X00 | Wire Feeder Controller Servo Board | All-Digital Precision Push Wire Mechanism Drive Servo Board |
| L22787C00 | Communication Line | Control Cabinet Internal Communication Bus |
| L22788B00 | Power Line | Auxiliary High Voltage Power Supply Line |
| L22789C00 | CAN Communication Board | Industrial Fieldbus Extension CAN Board |
| L22799B00 | Control Cable | – |
| L22799D00 | Control Cable | – |
| L22843A00 | Servo Drive Replacement Component | Quick-Change Spare Part for Control Cabinet Axis Drive Module |
| L22934B00 | Control Cable (4) | Control Cable (4) |
| L22937B00 | Cable 5M | 5-Meter Length Specification |
| L22959C00 | Cable | – |
| L22977B00 | Wire Push Machine Control Cable | Corresponds to Front Heavy Duty Push Wire Mechanism Wire Harness |
| L22978B00 | Wire Draw Machine Control Cable | Corresponds to Welding Gun Built-in Servo Draw Wire Motor Control Line |
| L22979B00 | Welding Wire Buffer Control Cable | Buffer Protection Line to Prevent Fast Wire Feeding Breakage |
| L23124A00 | Circuit Board | Process Arc Welding Processing Board |
| L23139A00 | Circuit Board | Core Control Board Unit |
| L23282B00 | Relay Cable | Multi-Level System Electrical Relay Connection |
| L23306B00 | CAN Communication Cable 1m | 1-Meter Short Distance Internal High Speed Communication Twisted Pair |
| L23400B20 | Sleeve | Structural Protection Rubber Sheath |
| L23400C00 | CPU Board | Latest Generation FD19 Control Cabinet Core Main Control Board |
| L23400E00 | CFAST Card | FD19 Dedicated Firmware and Linux Kernel Storage System Card |
| L23400F00 | Sequence Board | Control Cabinet Logic Timing/PLC Main Control Board |
| L23400K00 | Regenerative Resistor | Brake Energy Release/Braking High Power Resistor |
| L23400M00 | I/O Board | Standard Multi-Channel Universal Digital Input/Output Signal Board |
| L23400R00 | Transfer Slot Board | Motherboard/Mainboard Bus Transfer Mother Slot Board |
| L23400S00 | Arc I/F Board | Digital Welding Power Source Exclusive Full Communication Interface Board |
| L23400T00 | Relay Circuit Board (8/8) | 8-In/8-Out Matrix Safety Control Relay Board |
| L23400U00 | USB Memory | System Backup and Recovery Dedicated Driver-Free USB Flash Drive Component |
| L23401K00 | Regenerative Resistor | Braking Thermal Energy Consumption High Power Resistor Unit |
| L23420A00 | Low Voltage Unit | FD19 Control Cabinet Low Voltage Logic Power Supply Assembly |
| L23421A00 | High Voltage Unit | FD19 Incoming High Voltage Transformer Isolation Contact Distributor |
| L23423F00 | Cooling Fan | Inverter Room Dedicated Long-Life Axial Exhaust Fan Unit |
| L23424A00 | Relay Assembly | Integrated Control Component Including IO Layer Board |
| L23424C00 | Relay Board | Logic Safety Interlock Relay Board |
| L23425C00 | Extension Relay Circuit Board | Multi-Station Safety Light Curtain/Air Valve Extension Connection Board |
| L23430A00 | IPM Drive Device | All-Digital Six-Axis Integrated Servo Power Inverter Unit |
| L23430N00 | Capacitor Board | DC Large Bus High Voltage Filtering Large Capacitor Balance Board |
| L23430P00 | PN Board | Positive and Negative Rectifier Busbar Copper Row and Voltage Equalization Board |
| L23430R00 | Drive Board | Servo Gate Drive Trigger Pulse Logic Board |
| L23430S00 | Drive Board | Servo Gate Drive Trigger Pulse Logic Board |
| L23430T00 | Drive Board | Servo Gate Drive Trigger Pulse Logic Board |
| L23430X00 | Servo CPU Board | High Dynamic Axis Position/Current Loop Dedicated High Speed Calculation Board |
| L23430Y00 | Brake Power Board | Six-Axis Mechanical Brake Holding DC24V/90V Control Power Board |
| L23431A00 | IPM Drive Device | Multi-Axis Servo Drive Power Core Module |
| L23432A00 | IPM Drive Device | Multi-Axis Servo Drive Power Core Module |
| L23434A00 | IPM Drive Device | Multi-Axis Servo Drive Power Core Module |
| L23455W00 | External Axis Drive Board | High Power Positioner/Walking Rail Servo Axis Control Board |
| L23456W00 | External Axis Drive Board | High Power Positioner/Walking Rail Servo Axis Control Board |
| L23480F00 | Shorting Connector | Wrist Safety Impact Sensor Emergency Disconnect Shorting Plug |
| L23547P00 | PN Power Board | Rectifier Bus Auxiliary Logic Power Supply Board |
| L23595M00 | DEVICE-NET Motherboard | Industrial Grade DeviceNet Field Network Communication Main Card |
| L23639B00 | Anti-Collision Sensor Cable 7m | 7-Meter Ultra-Long High Flexibility Anti-Torsion Safety Anti-Collision Sensing Line |
| L23641B01 | Outer Box | Control Box Structural Metal Outer Box |
| L23641B02 | Panel | HMI Button Control Console Panel |
| L23641F00 | Cable Assembly 5m | 5-Meter Multi-Core High Shielding Control Line |
| L23641J00 | Button Switch | Emergency Stop Dual-Circuit Mechanical Self-Locking Button |
| L23642F00 | Cable Assembly 10m | 10-Meter Multi-Core High Shielding Control Line |
| L23643F00 | Cable Assembly 15m | 15-Meter Multi-Core High Shielding Control Line |
| L23700B03 | TP Hook | FD19 Teach Pendant Stainless Steel Anti-Drop Back Hook |
| L23700B11 | TP Lanyard | Engineer On-Site Operation Nylon Anti-Fatigue Anti-Drop Lanyard |
| L23700B12 | Screen Protective Film | High Transparency Anti-Fingerprint Industrial Grade Tempered Touch Protective Film |
| L23700C00 | CPU Board (TP) | Teach Pendant Internal Underlying Display and Microcontrol Motherboard |
| L23700P00 | Cable Assembly | Teach Pendant Motherboard Ribbon Cable and Signal Connection Wire Harness |
| L23700T00 | Touch Screen Component | High Sensitivity Industrial Grade Resistive/Capacitive Touch Outer Screen |
| L23700U00 | LCD Component | Teach Pendant High Definition Human-Machine Interaction Backlight LCD Inner Screen |
| L23700Z00 | Upper and Lower Shell Set | Includes L23700B01, B02, L21500B04, B08 Complete Shell |
| L23710G00 | Membrane Key Component | Front Oil-Resistant Membrane Function Key Operation Panel |
| L23711G00 | Membrane Key Component (English) | Export Version Pure English Physical Membrane Function Key Panel |
| L23712G00 | Membrane Key Component (Chinese) | Domestic Version Simplified Chinese Standard Physical Membrane Key Panel |
| L23713G00 | Membrane Key Component | Membrane Key Upgrade Replacement Part |
| L23780X00 | Wire Feeder Controller Servo Board | Precision Wire Feeding Servo Logic Tracking Core Card |
| L23842A00 | Switching Terminal Block | Control Cabinet Heavy Duty High Current Multi-Position Wiring Block |
| L23844C00 | Analog Output Interface Board | 0-10V/4-20mA Analog Speed Regulation and Voltage Interface Board |
| L24100F00 | Sequence Board | PLC Sequence Control Unit Board |
| L24135R00 | Relay Circuit Board | FD19 Low Voltage Safety Logic Hardwired Relay Board |
| L24146Y00 | Magnetic Core Component | High Power Cable Anti-High Frequency Radiation Absorbing Magnetic Ring Assembly |
| L24182Y00 | Mounting Bracket | Electrical Component Heavy-Duty Mounting Structure Bracket |
| L24182Z00 | Cable Assembly | In-Cabinet Control Interconnect Ribbon Cable |
| L24197A00 | CPU Board | Core Data High Speed Processor Board |
| L2527B00 | Gas Pipe 5M | 5-Meter High-Pressure Resistant Protective Gas Pipe |
| L2527D00 | Cable 5M | BIRB-3005 Welder Matching 5-Meter Control Line |
| L317X00 | Torch Tip Straightener | Mechanical Geometric Center Inspection Gauge Combination (L130W04+W06) |
| L317Z00 | Torch Tip Straightener | Standard TCP Inspection Gauge Combination (L130W05+W06) |
| L318D05 | Connector | 57A40162 Industrial Heavy Duty Connector |
| L318H00 | Welding Wire Spool Bracket | Model Upgraded and Changed to L10085A00 / 50B40030 |
| L318H05 | Insulation Board | 79A01578 Spool Wire Rack High Voltage Anti-Breakdown Insulation Board |
| L3375E00 | Welding Cable 10M | BIRB-3010 Dedicated Ultra-Soft WRNCT 80sq Main Welding Cable |
| L3375L00 | Cable(4) 10M | WNCT 80sq High Voltage Ground/Return Line |
| L3375T00 | Gas Pipe 10M | BIRB-3010 System 10-Meter High-Pressure Resistant Gas Circuit Guide Tube |
| L3382B23 | Transmission Key | Mechanical Axis Key Pin Structural Part |
| L3442B00 | Cable 5M | BIRB-3005 Dedicated 5-Meter Multi-Core Shielded Control Cable |
| L3590C02 | Contact Tip Measuring Device | 33D10560 Contact Tip Coaxiality Precision Geometric Gauge |
| L3700C00 | Printed Circuit Board | IRBCX-422/512 Control Board (Original Factory Specific Inventory) |
| L3702F00 | Printed Circuit Board | System Old Board (Now Discontinued) |
| L3753B01 | Adapter | Mechanical/Electrical Connection Adapter Seat |
| L3770B00 | Wire Feed Hose 1.5M | 1.5-Meter Low-Resistance High-Rigidity Consumable Wire Guide Tube |
| L3770C00 | Wire Guide Tube | Wear-Resistant Stainless Steel Flexible Wire Guide Tube |
| L3770F00 | Guide Tube | Classic Combination Z318T33+K917B14+U1079M01 |
| L4186X00 | Sealing Ring | 4739-472 Specification Protection Ring (Pack of 2) |
| L4193X00 | Center Part for Control Cable | Relay Cable Core Locking Splitter Fixture |
| L4456K00 | Infinite Rotation Connector | 2PF500 Positioner 7th Axis Exclusive Gas-Electric Infinite Rotation Connector |
| L450K00 | Guide Tube 1.2-1.6 | Heavy-Duty Thick Welding Wire Guide Tube Assembly (Z318T42+K917B14) |
| L4796E00 | Cable | 48L24722 High Flexibility Power Shielded Line |
| L4800C00-R | Printed Circuit Board | 48D01056 Control Cabinet Rotational Core Board Card |
| L4800F00 | Printed Circuit Board | Special Dedicated Board (Original Factory Specific Inventory) |
| L4800P00 | Printed Circuit Board | In-Cabinet Core Signal Conditioning Board |
| L4805C00 | Printed Circuit Board | Special Dedicated Board (Original Factory Specific Inventory) |
| L4805D00 | Printed Circuit Board | 48C80863 Signal Board |
| L5000C00-R | Printed Circuit Board | W-L01065 Main Circuit Control Rotational Product |
| L5550A00 | I/O Board | Universal Signal Input/Output Board (Original Factory Specific Inventory) |
| L5800Y00 | Inverter Module | High Power IGBT/Inverter Core Rectifier Topology Module |
| L6080L00 | Cable Assembly | 48L24250 System Skeleton Cross Line |
| L6125C00 | Welding Gun Straightener | Robot Automatic Positioning Teach Torch Gauge |
| L6218C01 | Physical Connector | High-Sealing Grade Fluid Quick Connector |
| L6220B15 | Flat Key | Mechanical Drive Shaft Locking Flat Key |
| L6300B00 | Welding Torch Mounting Bracket (Disk) | Flange End High Rigidity Mechanical Wrist Gun Frame |
| L6300B01 | Bracket | 57F20295 Exclusive High Strength Structural Frame |
| L6300B03 | Slider | 57F20310 Precision Teach Torch Adjustment Slider |
| L6300B04 | Insulation Board | 79B90092 Torch Bracket Core Arc High Voltage Insulation Board |
| L6300C00 | Welding Gun Straightener | 57F30001 Classic Mechanical 6-DOF Torch Calibration Gauge |
| L6300C02 | Standard Calibration Nozzle | 57F30179 Torch Gauge Core Standard Calibration Contact Tip |
| L6300E00 | Welding Gun Straightener | High Precision Automated Teaching Gun Reference Part |
Designated Authorized Channel · Original Genuine Guarantee
Quickly Obtain Real-Time Quotes and Inventory for This Spare Part
Because the prices of industrial electrical spare parts (such as core control boards, inverter drives, and special cables) fluctuate due to original factory batches and exchange rates, and some discontinued old models have official upgrade replacements, you are welcome to provide specific part codes and contact us directly to obtain the latest official standard quotes and technical replacement solutions:
Service Hotline (WhatsApp):
+86-18096631656
Corporate Inquiry Email:
ahojotc@gmail.com
Why Choose Official Original OTC DAIHEN Robot Electrical Spare Parts?
The control systems of industrial robots have extremely strict precision matching requirements for voltage waveforms, signal impedance, and logic communication timing. Using non-original refurbished parts or inferior counterfeit boards can easily lead to the destruction of the main CPU board of the entire control cabinet due to instantaneous current overload, triggering large-scale production halts. We guarantee that all supplied circuit boards, inverter modules, signal shielded cables, and teach pendant components are Official Original Genuine Products. If you need to check today’s spare parts inventory, apply for rotational part testing, or request technical documents for welding machine fault alarm troubleshooting, please feel free to contact our technical team at any time.