SINAMICS DC MASTER is the drive system for basic applications and demanding DC applications. The use in a wide range of different sectors and complementary markets demands a high degree of scalability and the ability to expand the converter series over a wide range.

In order to be able to guarantee this versatile use, SINAMICS DC MASTER has a whole raft of new features:

The SINAMICS drive family

SINAMICS DC MASTER is a member of the SINAMICS drive family. The individual SINAMICS versions are based on a common platform, especially in the area of interfaces, tools and operator control & monitoring.
All of the SINAMICS drives support the TIA philosophy and share common ways of engineering, communication and data management with the SIMATIC, SIMOTION and SINUMERIK automation systems from Siemens. When using these systems, automation solutions can be very simply generated using SINAMICS.
As a result of the standard and seamless integration into the automation environment of Siemens, customers also profit from faster engineering and commissioning of the complete machine automation and drive technology. Further, training-related costs are reduced and support, service & maintenance and spare parts stocking are simplified.

PROFIBUS as standard, PROFINET optional

The units are equipped as standard with PROFIBUS – the industry standard. PROFINET or EtherNet/IP is also available as an option. Communication to other fieldbus systems can be realized using external adapters.

Variance of the Control Units

In order to optimally fulfill the requirements relating to interfaces and computational performance for technology functions, a Standard or Advanced CUD or a combination can be selected. It is also possible to use two CUDs to increase the performance for technological open-loop and closed-loop control tasks. This allows optimum adaptation to the wide range of requirements relating to drive technology and complementary markets – both technically and economically.

Field power supply in line with requirements

With the introduction of SINAMICS DC MASTER, you have the option of selecting the optimum field power supply for your particular requirements.
SINAMICS DC MASTER is always the optimum choice:

• For units without field (from a rated DC current of 60 A and higher)
• For units with a 1Q field (with integrated free-wheeling circuit)
• For units with a 2Q field to actively reduce the current for high-speed field current changes and integrated field overvoltage protection (from a rated DC current of 60 A and higher)

For units from 1500 A and higher it is also possible to select a version with 85 A rated field current in a 1Q or 2Q version instead of the 40 A field power supply. It goes without saying that an external field power supply unit can also be connected – if the application demands it.

24 V DC electronics power supply

The electronics power supply of the DC Converter will be available in two versions:

• For connection to 230 V/400 V AC or
• For connection to 24 V DC (protected against polarity reversal).

Using a 24 V supply, a UPS function can be simply implemented - and therefore the availability of the plant or system increased.

The figure above shows a 24 V DC power supply SITOP smart.

Power section isolated with respect to ground (floating voltage sensing)

The power section voltage sensing inside the unit is floating with respect to the electronics (electrically isolated).
This is the reason that in the future it will not be necessary to disconnect/connect the motor cable to measure the insulation resistance of DC motors. In order to secure the availability of the plant or system and to avoid severe damage to the motor, it is absolutely mandatory that the insulation resistance of DC motors is regularly checked.

Free function blocks and Drive Control Chart

A sufficient number of free function blocks for various applications is included as standard. Optionally, the functional scope can be subsequently extended using free function blocks from Drive Control Chart (DCC). This allows the drive to be optimally adapted to the particular application – both technically and economically.

Expandable functionality using SINAMICS components

Additional inputs and outputs are available by coupling supplementary modules from the SINAMICS range to the DRIVE-CLiQ interface (Advanced CUD). As a consequence, the flexibility when engineering the plant or system is increased and at the same time costs are optimized.

Single-phase connection is possible

For units up to 125 A and up to 575 V AC, the full functionality is available even when supplied through just two conductors. This means, for example, that when retrofitting a converter with single-phase connection, it is not necessary to make any changes to the existing machine or plant – and the retrofitted drive system can be integrated into state-of-the-art communication concepts (TIA).

Coated PCBs and nickel-plated copper busbars

PCBs coated on both sides and nickel-plated copper busbars are two options to improve the reliability for increased degrees of pollution and climatic stressing – as well as for increased environmental stressing (e.g. for aggressive atmospheres).

Wide temperature range

Use in regions with high climatic stressing is made simpler as a result of the -40 °C to +70 °C temperature range for storage and transport.