ESR Pollmeier GmbH
Servo Drive Technology

MidiDrive
Characteristics of the MidiDrive servo drives
  • Analog servo drives for AC servo motors
  • Particularly suitable for applications with higher-level controllers (CNC)
  • Two designs: Compact drives for control cabinet installation, complete with built-in power supply, or 19" plug-in module (chassis available as required)
  • Mains connection to 3 × 400 V or 3 × 480 V three-phase mains (via isolating transformer)
  • Design conforms to EMC requirements (CE marked), compliance with class A and B through RFI-filters (internal with compact drive, external with 19" plug-in module)
  • Easy wiring, since all connections can be plugged in at the front
  • High performance with compact dimensions thanks to use of surface mounting devices (SMT) and latest power transistors (IGBTs)
  • Easy installation due to adjustable feedback, speed, offset, and current limit
  • No re-adjustment necessary when the drive is replaced thanks to plug-in customer module with all setting components
  • Easily adapted to non-standard applications with plug-in option modules
  • Rapid acceleration, deceleration and reversing of servo motor by momentary current increase to 2.4-times rated current
  • No noise with switching frequency well above audible range
  • Control supply voltage fed either by bus voltage or by 24 V DC
  • Safe operation thanks to various protection and monitoring circuits
  • Drive and motor protected by adjustable I²t current limiter
  • Easy error diagnosis with LEDs for fault, standby, and overload
  • Load and speed monitoring with current and speed monitor outputs
  • Available also adapted to motors of other manufacturers
Data sheet 6661.250 – MidiDrive (PDF, 703 kB)

Order number
– Compact device		 BN 6661 BN 6663 BN 6665 BN 6667 BN 6669
– 19" module BN 6670 BN 6672 BN 6674 BN 6676 BN 6678
Mains connection * 3 × 230 V +10% (min. 3 × 120 V), 50 .. 60 Hz
Bus voltage 320 V DC (160 V .. 420 V)
Rated current, rms value 1.5 A 3 A 6 A 9 A 12 A
Peak current
(crest value)		 5 A 10 A 20 A 30 A 30 A
For AC servo motors
– Rated torque
– Shaft power		 up to 0.5 Nm
up to 0.2 kW		 up to 2 Nm
up to 0.4 kW		 up to 5 Nm
up to 1.0 kW		 up to 10 Nm
up to 2.0 kW		 up to 12 Nm
up to 2.6 kW
Switching frequency 16 kHz
Setpoint ±10 V for speed or torque
Dimensions compact ** w×h×d 85 × 275 × 200 mm 95 × 305 × 200 mm
* via isolating transformer at 3 × 400 V or 3 × 480 V; with 19" design power supply BN 3180.1206 additionally required
** dimensions of 19" plug-in module: width = 10 width units (50.8 mm), height = 6 height units (262 mm), depth = 195 mm

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