Serwonapędy serii 12XXX

Serwonapędy serii 12XXX



The 12XXX series thyristor converters are designed for the precise speed  control of DC motors  for servo drives. Their control  is realized by modern DSProcessors and it enables a wide speed regulation range, high reliability and stability of the operating characteristics.

            According to their purpose, the 12XXX series converters are universal. At the same time they have built in functions and interface which have been optimized for the control of feeding drives in CNC machines. They can completely replace the old analog converters  types КЕМЕК, КЕМРОН, КЕМТОК, FANUC, SIEMENS ect.

The main functional possibilities of the 12XXX series converters are as follows:

  • Precise four quadrant control of DC motors for feeding drives;
  • Digital adaptive PID speed regulator with adaptation as function of real speed or as function of speed error;
  • Flexible parameter adjustment possibility of the adaptive speed regulator including adjustment of the thresholds of their function;
  • Digital armature current regulator;
  • Dynamic speed regulation range – more than 1 : 10 000;
  • Speed feedback by tachogenerator or encoder;
  • Programmable dynamic limitation of armature current defined at 6 points;
  • Automatic definition of the sequence of phases of the power supply and possibility of function at “left” and “right” phase rotation;
  • System of programmable and device protections ensuring the safety function of converter and electric drive;
  • Universal digital inputs for positive or negative polarity signals;
  • Internal or external voltage supply of digital inputs;
  • Converter adjustment by parameter system of  8 groups;
  • Possibility of monitoring of the main electric drive variables;
  • Entering and measuring the variables of current, voltage and frequency of the electric drive in engineering units ( A, V and Hz);
  • Special means for drive preliminary control and adjustment;
  • Digital input and output control;
  • Speed feedback sensor control;
  • Power supply quality control;
  • Power thyristor control;
  • Terminal language choice;
  • Error list with possibility of reading the last 10 error messages.

            The main technical data of the 12XXX series digital thyristor converters for feeding drives are shown in the table.


Converter type






Armature rated current

12 A

12 A

31 A

31 A

80 A

Max armature current

60 A

60 A

155 A

155 A

400 A

Power voltage  *1

3x120 V

3х220 V

3x120 V

3x220 V

3x220 V

Frequency of power voltage

45 ÷ 65 Hz

Max voltage of motor armature

130 V

250 V

130 V

250 V

250 V

Power contactor and dynamic stop

Built in


Dynamic current limitation of armature current


Speed regulation range not less than

1:10 000

Speed feedback sensor

Tachogenerator or encoder

Analog input of speed feedback

64 ranges

≤ 120 V at N MAX

Analog input for Speed setting

± 10V, 10 kΩ

Digital inputs

2 inputs,  ± 24V / 10mA

Digital outputs

2 outputs relay type, 100V AC / 0.3A, 24V DC / 0.3A

Series interfaces  *2

RS 232C up to 9600 bps

RS 422 or RS 485 до 115 200 bps

Working regime

Continuous  S1

Protection class

ІP 20

Dimensions  HхWхL





*1   - Refering to the voltage of converter power rectifier;

*2   - The series interfaces RS422 и RS485 are optional and can be installed on clients order.