For several years, CHANGXIN have specialized in trading high-quality components in the field of industrial automation.
Focusing on PLC components, DCS and CNC technology, and drivetechnology
ABB DCF506-0140-51 excitation circuit overvoltage protection freewheeling module
| Brand: ABB |
| Item NO: DCF506-0140-51 |
| Effect: excitation circuit overvoltage protection freewheeling module |
| Condition: In stock, brand new/Used |
| Warranty: 365 days |
| Payment:T/T 50% deposit, 50% balance |
| www.szcxdcs.com |
+86 15359298293
ABB DCF506-0140-51 excitation circuit overvoltage protection freewheeling module
ABB DCF506-0140-51 is an excitation circuit overvoltage protection freewheeling module suitable for DCS800/DCS500B DC drive systems, specifically designed for the inductive load circuit of DC motor excitation windings.
The core function of DCF506-0140-51 is that when the excitation circuit is disconnected and the magnetic field is reversed, the inductance will generate a high reverse induced overvoltage. DCF506-0140-51 has a built-in thyristor freewheeling bypass circuit, which quickly clamps surge voltage, absorbs magnetic field energy from the excitation winding, and protects the excitation power unit and thyristor devices from overvoltage breakdown; At the same time, provide feedback on dry contact fault signals to the transmission main control, report the status of continuous current action and fault alarms, and ensure the reliable and safe operation of the DC motor excitation circuit.

We are a trader specializing in the supply of industrial automation control system spare parts, providing long-term services to the manufacturing and energy infrastructure sectors. Our business covers discontinued spare parts, functional modules, control cards, and drive devices for the four core systems of PLC, DCS, robots, and servo drives. We are committed to providing customers with stable and reliable replacement and supply chain solutions for discontinued parts.
Main product range
- Control system (DCS/PLC/CNC): panel controller, HMI and human-machine interface, industrial PC, CPU processor module, communication module, analog/digital I/O module
- Drive and motion control: frequency converter, servo drive, servo motor, power module
- Robot spare parts: key spare parts such as robot control board, axis computer, servo unit, I/O module, etc
- State monitoring and safety system: vibration monitoring system, safety instrumented system (SIS), redundant controller
Application Industry
The products are widely used in various industrial fields such as metallurgy, oil and gas, petrochemicals, electricity, power transmission and distribution, water conservancy, water treatment and environmental protection, coal mining, aluminum industry, glass manufacturing, paper and printing, textile printing and dyeing, machinery manufacturing, electronics manufacturing, automobile manufacturing, plastic machinery, boiler heating, energy, etc.
ABB DCF506-0140-51 excitation circuit overvoltage protection freewheeling module


Main brand
| No. | Brand | Country/Region | Main Product Lines | Typical Series/Models |
| 1 | ABB | Switzerland | PLC/DCS Controllers, I/O Modules, Robot Spare Parts, Drive Systems | AC800PEC,AC800M, AC800F, AC31, 800xA, Bailey INFI 90, DSQC Robot Modules, Advant OCS, H&B Freelance |
| 2 | Bently Nevada | USA | Condition Monitoring Systems, Vibration Sensors, Proximitors | 3500 Monitoring System, 3300 Monitoring System, Eddy Current Probes, Proximitors |
| 3 | TRICONEX | USA | Safety Instrumented Systems (SIS), TMR Redundant Controllers | Tricon System Modules, Communication Modules, I/O Modules |
| 4 | Woodward | USA | Steam/Gas Turbine Control, Speed Governing Systems, Actuators | 505 Governor, ProTech, MicroNet, NetCon Series |
| 5 | FOXBORO | USA | DCS Systems, I/A Series Control Modules | I/A Series, FBM Modules, Controllers |
| 6 | WESTINGHOUSE | USA | DCS Systems, Ovation Controllers, Modules | Ovation System, WDPF Series |
| 7 | Motorola | USA | Industrial Communication Modules, Embedded Control Modules | MVME Series, VME Bus Modules |
| 8 | GE | USA | PLC, Excitation System Modules, CPU/Communication/Analog Modules | IS200/DS200 Excitation Cards, IC693/IC695/IC697/IC698/IC200/IC660/IC670 Series |
| 9 | YOKOGAWA | Japan | DCS Systems, CPU Modules, I/O Cards | CENTUM CS3000, CS1000, VP Series |
| 10 | HIMA | Germany | Safety Control Systems, SIL Safety Modules | H41q/H51q, HIMax, HIMatrix Series |
| 11 | EMERSON | USA | DCS Systems, Redundant Controllers, Safety Systems | Ovation, DeltaV Dual-Channel Redundant Safety Systems |
| 12 | Honeywell | USA | DCS Systems, Process Control Modules | Experion PKS/LS/HS, Plant Scape, TDC2000, TDC3000, TPS, Alcont |
| 13 | ICS TRIPLEX | UK | Trusted Safety Control Systems, TMR Modules | Trusted System, T8000 Series |
| 14 | Kollmorgen | USA | Servo Drives, Servo Motors, Motion Control | S700, S300, AKD Series Drives, Servo Motors |
| 15 | PROSOFT | USA | Industrial Communication Modules, Protocol Gateways | MVI69, MVI56, MVI94, MVI71, MVI46, PS69, 3150 Series |
| 16 | Alstom | France | Power Control, Protection Relays, Control Systems | GEC ALSTHOM, Protection and Control Modules |
| 17 | EATON | USA | Electrical Control, PLC, Power Supplies, Circuit Breakers | XC/XN Series PLC, Moeller Series, Power Supply Modules |
| 18 | Allen-Bradley (Rockwell) | USA | PLC Controllers, I/O Modules, Communication Modules | ControlLogix 1756, CompactLogix 1769, SLC 500 1747/1746, PLC-5 1771/1785 |
| 19 | Schneider | France | PLC, Modicon Series, CPU/Communication Modules | Quantum 140, Modicon M340, Modicon Premium |
————————Shenzhen Changxin Automation Equipment Co Ltd -————————
Products that have been released are welcome for consultation. Due to the wide variety of models, we were unable to upload physical images one by one!
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ABB DCF506-0140-51 excitation circuit overvoltage protection freewheeling module
Parameter specifications
| Item | Specification |
|---|---|
| Part Number | DCF506-0140-51 |
| Manufacturer | ABB |
| Module Type | Excitation Circuit Overvoltage Freewheeling Protection Module |
| Compatible Drive | DCS800 / DCS500B DC drive series |
| Rated Max Field Current | 140 A DC |
| Maximum Operating Voltage | 500 V DC |
| Trigger Mode | Thyristor active bypass |
| Fault Output | Dry contact relay output |
| Auto Reset Condition | Overvoltage removed, current below 0.5 A DC |
| Control Supply Voltage | 24 V DC |
| Power Consumption | 7 W typical |
| Terminal Type | Screw terminal for F+ / F- excitation wiring |
| Insulation Voltage | 1500 V AC |
| Enclosure Protection | IP20 |
| Mounting Method | Installed on DCS800 drive chassis |
| Operating Temperature | -20℃ ~ +45℃ |
| Storage Temperature | -40℃ ~ +70℃ |
| Relative Humidity | 5% ~ 95%, non-condensing |
| Vibration Standard | IEC 60068-2-6 |
| Shock Standard | IEC 60068-2-27 |
| Dimension | 170 mm × 105 mm × 32 mm |
| Net Weight | Approx. 0.3 kg |
| EMC Standard | IEC 61000 series |
| Certification | CE |
| Diagnostic Indicator | Power, Fault, Action LED |
| Protected Load | DC motor excitation winding, inductive load |











