ESR Pollmeier GmbH
Servo Drive Technology

MidiDrive D/xS

Characteristics of the MidiDrive D/xS servo drives
  • Digital servo drives for AC servo motors and direct drives (torque motors, linear motors)
  • Compact drives for control cabinet installation, complete with built-in power supply for direct connection to 3×400/480 V~ AC (wide-range input)
  • Integrated safety system, wear-free, two-channel (PL e according to ISO 13849-1 and SIL 3 according to IEC 61800-2)
  • Design conforms to EMC requirements (CE marked; class A standard, class B through accessories)
  • Switching frequency 8 or 16 kHz selectable for optimum dynamic characteristics and small motor power loss
  • High dynamics and control quality through signal processor for digital control of current and speed (controller cycle time 62.5 µs)
  • Position control loop (16-bit microcontroller, cycle time 1 ms) integrated, setting the target positions via communication interfaces (standard) or positioning control with 500 blocks (option)
  • Rapid acceleration, deceleration, and reversing of the motor by momentary current increase to double the rated current
  • High processor power for fast axis control and communication
  • Extensive technology functions, positioning control as an option
  • 8 digital inputs, 4 digital outputs, additionally 2 analog inputs and 2 analog outputs (partly optional)
  • Communication via fieldbus interface according to DRIVECOM profile 22 or serial port, RS 232C (standard)
  • Easy wiring, since all connections can be plugged in at the front and at the top
  • UL certification in preparation (CSA on request)
  • Comfortable commissioning and diagnosis using a personal computer
  • Function blocks for the development of customized application programs and easy integration in automation systems available
  • MidiDrive D/AS: with analog interface and encoder emulation
  • MidiDrive D/CS: with CANopen interface
  • MidiDrive D/ES: with EtherCAT or Ethernet (TCP/IP) interface
  • MidiDrive D/PS: with Profibus DP interface
Data Sheet 6755.250 – TrioDrive D/xS / MidiDrive D/xS Servo Drives

Order number BN 6745 BN 6746 BN 6747 * BN 6748 BN 6749 *
Rated supply voltage 3×400/480 V~ ±10%, 50 .. 60 Hz
Rated DC-bus voltage 560/680 V DC
Permissible supply voltage 85 .. 528 V~ (corresponds to 125 .. 740 V DC-bus voltage)
Rated current (rms value) 2 A 4 A 8 A 16 A 32 A
Peak current (crest value) 5.5 A 11 A 22 A 45 A 90 A
for AC servo motors up to 3 Nm rated torque up to 7 Nm rated torque up to 17 Nm rated torque up to 35 Nm rated torque up to 70 Nm rated torque
Switching frequency 8 or 16 kHz (to be selected)
Control supply voltage 24 V DC ±20%, 0.5 A 24 V DC ±20%, 1.1 A
Dimensions w×h×d 70 × 275 × 200 mm 190 × 275 × 227 mm
* BN 6747 (8 A devices) and BN 6749 (32 A devices) servo drives may be operated at a power circuit switching frequency of 8 kHz without restrictions. With 16 kHz, the rated current is reduced to 6 A or 16 A (rms) and the pulse current to 22 A or 45 A (crest value), respectively.

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