Design Features

The Ndrive® family of digital servo amplifiers are high performance discrete drives used with the Automation 3200 motion controller. These drives are capable of controlling brushless, DC brush, and stepper motors over a wide range of operating voltages and currents. Based on a common architecture, Ndrive amplifiers perform both current- and position-loop closures digitally.

The use of high-performance double-precision processors allows these drives to generate ultra-smooth motion profiles. Servo system response is optimized with the use of up to eight second-order loop-shaping filters, precise time-aligned feed-forward and other proprietary techniques with loop closure rates up to 20 kHz.

The Ndrive family includes several versions of low noise, ultra-high-performance linear drives. The Ndrive series provides high bandwidth and superb linearity required for the ultimate in velocity regulation as well as positional stability. The Ndrive HLe offers the ability to use resolver or inductosyn sensors and provides the highest level of encoder interpolation. For low-power, high precision systems use the Ndrive ML.

Options for the Ndrive family include integral encoder interpolation, one- to three-axis position synchronized output (PSO), automatic brake control, digital and analog I/O expansion, absolute encoder interface, and one- or two-channel resolver interfaces. An optional dedicated ethernet port is available on the HLe drives for connection to third-party I/O expansion devices. This provides the potential to connect to a large number of I/O points typically required for PLC-type applications.

Any combination of Ndrive amplifiers may be connected to the Automation 3200 FireWire® network, allowing the system to be customized as needed.

Specifications

Ndrive ML Specifications

Ndrive MLUnits
Motor Style
Brush, Brushless, Stepper, Voice Coil
Motor SupplyVDC±40 max
Control Supply(1)VDC18-36 VDC
Bus Voltage(2)VDC±40
Peak Output Current (1 sec)(3,4)Apk10
Continuous Output Current(3,4)Apk5
Digital Inputs
N/A
Digital Outputs
N/A
Analog Inputs
One 16-bit Differential; ±10 V
Analog Outputs
N/A
Dedicated Axis I/O on Feedback Connector
Three Limit Inputs (CW, CCW, Home); Three Hall Effect Inputs (A, B, C); Three High-Speed differential Inputs (sin, cos, mkr for encoder); Motor Over-Temperature Input
Dedicated I/O on Auxiliary Feedback Connector
N/A
I/O Expansion Board(5)
8/8 Digital Opto-Isolated; 1 Analog In (±10 V, 16bit Differential); 1 Analog Out (±5 V, 16-bit); sin, cos, mkr for Aux Enc; Aux Enc can be used for PSO Output
High Speed Data Capture
Yes (50 ns Latency)
Automatic Brake Control
Optional
Emergency Stop Sense Input (ESTOP)(6)
Standard; 24 V Opto-Isolated
Position Synchronized Output
Single Axis Only
Can Output Multiplied Encoder
Yes (MXH Only)
Can Output Square Wave Encoder
Yes
Primary Encoder Input Frequency
32 MHz Square Wave Standard; 2 MHz Sine Wave (MXU or MXH)
Secondary Encoder Input Frequency
32 MHz Square Wave
Encoder Multiplication
Up to x4096 (MXU); Up to x65536 with Quadrature Output (MXH)
Resolver Interface
N/A
Internal Shunt Resistor
N/A
External Shunt
N/A
Ethernet
N/A
USB
No
RS-232
No
FireWire
Yes
Fieldbus
Modbus TCP on PC
Current Loop Update RatekHz20
Servo Loop Update RatekHz8
Power Amplifier BandwidthkHzSelectable Through Software
Minimum Load InductancemH0
Operating Temperature°C0 to 50
Storage Temperature°C-30 to 85
Weightkg1.0
Standards
CE approved, NRTL safety certification, 2011/65/EU RoHS 2 Directive

  1. "Keep Alive" supply.

  2. Output voltage is load dependent.

  3. Peak value of the sine wave; rms current for AC motors is 0.707 * A pk.

  4. Load dependent.

  5. Requires I/O option.

  6. Requires external relay to remove motor supply power.

Dimensions

Ordering Information

Please go here for ordering information.