We supply original Siemens industrial automation components, including DC Master Drive, DC Drive Converter and electronic module.
All models are genuine and tested before delivery, stable performance, long service life.Adequate inventory supports fast delivery. We provide one year warranty for all products.
These Siemens drives are widely applied for DC motor speed regulation in metallurgy, paper making, printing, lifting machinery and other industrial equipment.If you need to confirm stock, specifications or quotation, please send us an inquiry.
FAQ for Siemens 6RA Series DC Converter
Q1: What is Siemens 6RA series converter?
A: Siemens 6RA series is a full digital DC drive converter, including classic 6RA23, 6RA70 and upgraded SINAMICS DCM 6RA80 models. It adopts line-commutated thyristor technology to realize precise speed, torque and current closed-loop control for DC motors, widely used in heavy-duty industrial variable speed applications. It supports single-quadrant and four-quadrant regenerative operation, with modular design for easy maintenance and expansion.
Q2: What industries and machines are 6RA converters applied to?
A: Typical applications include rolling mills, paper machines, extruders, mine hoists, crane lifting systems, printing machinery, wire drawing machines, plastic machinery, cement kiln drives and other high-performance DC drive scenarios requiring stable torque and wide speed regulation range.
Q3: What are the main differences between 6RA70 and 6RA80?
A: 6RA70 (SIMOREG DC MASTER) is the mature classic generation, stable for retrofitting old equipment; 6RA80 (SINAMICS DCM) is the successor model, supporting richer communication protocols, more powerful diagnostic functions, better EMC performance and compatible with modern Siemens automation systems like S7-1200/S7-1500. 6RA80 can use BOP20/AOP30 panel and STARTER software for commissioning.
Q4: What communication interfaces does 6RA series support?
A: 6RA70 supports USS, PROFIBUS DP via optional communication boards. 6RA80 integrates more options: PROFIBUS, PROFINET, Modbus TCP, USS, Canopen and other industrial bus modules to connect PLC, HMI and upper monitoring systems.
Q5: Is this converter compatible with all DC motors?
A: It works with most separately excited DC motors. You need to match the rated armature current, armature voltage, field voltage and field current of the converter with your DC motor parameters. Permanent magnet DC motors require special parameter configuration, please confirm motor data before ordering.
Q6: Can I use a VFD (AC frequency inverter) to replace 6RA DC converter for DC motor?
A: No. Standard AC VFD outputs variable-frequency AC for asynchronous AC motors. DC motors require adjustable DC armature voltage and independent field excitation control, which only dedicated DC converters like 6RA can provide. Using AC inverter will cause permanent damage to DC motors.
Q8: How to commission and parameterize the 6RA converter?
A: 6RA70 uses DriveMonitor software or basic operator panel; 6RA80 uses STARTER software, BOP20 basic panel or AOP30 advanced panel. Standard commissioning flow: restore factory settings → input motor nameplate data → execute automatic current & speed loop optimization → set speed source, limit value and communication parameters. We suggest professional electricians complete on-site commissioning.
Q9: What are common fault codes and basic troubleshooting tips?
A: Typical alarms: F004/F60004 (power phase failure/line fault), F005 (field circuit fault), F006 (overvoltage), F012 (overcurrent). Basic checks: confirm 3-phase input power integrity, cable insulation, motor brush and excitation circuit. Always cut off main power before inspection. For persistent faults, record fault codes and contact technical support.
