1,2 drives, 12-100V, up to 13.3/40A


Single/Dual Axis NanoPWM Drive with ±10V commands interface      

  • Powerful Dual Axis  Drive Module
    Two drives per module 
    Voltage: 12Vdc – 100Vdc
    Current: Up to 13.3A / 40A (cont./peak)
  • The Ultimate Drive for Demanding Positioning Applications
    Sub-nanometer standstill jitter
    Nanometer tracking error and optimal velocity
  • Replaces Linear Drives while gaining all the advantages of PWM drives
    ±10v current commutation commands controller-drive interface
    Lower heat dissipation
    Better reliability
    Significantly smaller
    Simpler supply requirements
    Digitally controlled and easy setup
     Dynamic range control
    STO (Safe Torque Off) option
    Built-in motor phases shortening relays option

The NPAPM is a line of the most advanced PWM servo drives available today.

It is specifically designed to address the most demanding applications with regards to move and settle times, standstill
jitter, and velocity smoothness, such as wafer metrology and inspection, FPD inspection, and ultra-precision machining
for processing of optical components.

The NPAPM is based on ACS' proprietary and unique   technology that exceeds stand still jitter and tracking error performance that until now has been achieved only with linear drives, while gaining all the benefits of a PWM type drive, such as lower heat dissipation, smaller size, and better reliability.

The unit is designed to operate with any motion controller that supports two ±10V sine wave current commutation commands.

The Unique    feature enables the motion controller to dynamically modify the current/command gain of the drive for higher resolution low level current control and thus providing better velocity smoothness and lower position jitter control.

The current loop PI filter is programmable and its gains can be set either by a DIP-Switch setting to one of 16 pre-set values. Finer tuning can be done by using PC based setup software.

The drives are protected against over current, over temperature, and over voltage. The unit supports motor over temperature protection.

Optional built-in relays will shorten the motor phases when the drive is disabled.

Optional STO (Safe Torque Off) is available to comply with EN ISO 13849-1 system safety standard.


CE, UL (Pending)

EtherCAT® is registered trademark and patented technology, licensed by Beckhoff Automation GmbH, Germany.



Per Axis A B C D
Continuous/Peak current Sine
amplitude [A]
3.3/10 6.6/20 10/30 13.3/40
Continuous/Peak current [Arms] 2.3/7 4.6/14.1 7/21.2 9.4/28.2
Maximum cont. input current [A] 2.6 5.3 8 10.6
Maximum heat dissipation [W] 7 + 0.9*i 7 + 2.1*i 7 + 3.7*i 7 + 5.6*i
Maximum Continuous/Peak
output power @ 100Vdc [W]
260/780 520/1560 790/2340 1050/3120
Peak current time [sec] 1
Minimum load inductance
@100Vdc [mH]
Can be derated linearly for
lower voltages
i = no. of drives
Per Module
Control voltage input [Vdc] 24 ±10%
Drive voltage input range [Vdc] 12 – 100 (96 recommended)
Maximum drive voltage [Vdc] (Vin motor) x 88%



Type: three-phase bridge   technology.
PWM frequency: 20 kHz.
Switching method: advanced unipolar PWM.
Control: PI digital filter. PI gains are selected by a four position DIP-switch
or programmed when connected to a PC.
Current loop sampling rate and update rate: 20 kHz.
Programmable current loop bandwidth: up to 4kHz, will vary with tuning & load parameters.
Protection: Over & under voltage, Over current, Over temperature, Phase to phase and phase to ground short (short circuit on one of the motor phases might damage the drive).

Motor over temperature protection: Type: Single ended, opto-isolated.
Built-in motor phase shortening relays (optional): disconnect the motor from the drive and shorten the phases of the motor.



The module is fed by two power sources. A motor supply and a 24Vdc control supply.
During emergency conditions there is no need to remove the 24Vdc control supply.

Motor Drive Supply
Range: 12Vdc - 100Vdc, recommended: 12Vdc - 96Vdc.
Current rating should be calculated based on actual load.
If regeneration resistor is required, it should be added in parallel to motor supply with 102V shunt activation.

Control Supply
Range: 24Vdc ±10%
Maximum input current / power: 1A /20W without motor brakes.
With 2 motor brakes: 1.9A /42W
Built-in motor phases shortening relays.
Protection: reverse polarity. 


Motor Type

Two- and three-phase permanent magnet synchronous (DC brushless/AC servo), DC brush, Voice coil, Two- and three-phase stepper (micro-stepping open or closed loop).


Drive-Controller Interface

Current command input: sine wave current commutation commands, ±10V differential, 16 bit resolution.
Offset: <20mV, Bandwidth <5KHz.
Dynamic range control input: 5V, opto-isolated, source. Input current < 7mA.
When 0V, a 10V current command will generate the specified maximum current.
When 5V, a 10V current command will generate 1/8 of the specified maximum current.
Drive On/Off output: TTL, active low @ enable, active high @ disable.
Output current 1mA.
Drive enable input: TTL, active low. Input current: <7mA.
Drive fault output: TTL, active high. Output current 1mA.


Drive Status Display

One per axis, 7 segment display.
Fault Indications: Over voltage, STO, short circuit, drive over temperature,
motor over temperature, under voltage, drive over current,
drive saturation.

STO (Safe Torque Off) inputs

Two inputs. 24V ±20%, Input current: <50mA.
All drives are disabled within 200mS.

Motor Brake Control Outputs 

One per drive, 24V ±20%, source, 0.5A.


Current monitoring analog outputs

Two per drive, for motor phases S and T.
Type: ±10V, differential, 16 bit resolution.
Offset: ±50mV, Max. output load: 10kΩ.

EtherCAT® Communication

Used to connect to an ACS motion controller for current loop setup and fine tuning purposes.
Two EtherCAT® ports: In and Out, RJ45 connector.


Operating range: 0 to + 40°C
Storage and transportation range: -25 to +60°C
Humidity (operating range): 5% to 90% non-condensing



257x154.9x50.9 mm3



NPXpm-ACC1: Mating connectors kit
UDMmc&NPXpm-ACC2: (J1) mating 2m flying lead cable

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