4 Axis Pulse/Direction Drive Interface


EtherCAT ® 4 Axis Pulse/Direction
Interface Module


  • Four axis Pulse Direction interface Module for EtherCAT network
  • Open loop control of Servo or Step motor drives with Pulse/ Direction interface
  • High frequency programmable pulse rate for triggering lasers
  • Up to 4M pulses per second
  • Eight digital inputs and eight digital outputs


The PDMNT provides the ability to add up to four step motor and servo motor drives with Pulse/Dir interface to an EtherCAT network using any of ACS’ EtherCAT masters.
Each of the dive interfaces consists of Pulse/Dir, limit switches, enable and fault feedback.
The maximum pulse rate is 4MHz.
The module can also be used by a SPiiPlus EtherCAT master to control Laser generators with a dynamically programmableprogrammable pulses.

The following modes are supported:

  • Real-time varying duty cycle (=PWM), with a programmable constant frequency
  • Real-time varying frequency with programmable constant pulse width (P/D like)
  • Real-time varying frequency with programmable constant duty cycle





Control supply

Control supply input voltage: 24Vdc ± 10%

Max. input power: 5.5W
Input current: <0.25A


Pulse/Direction Interface

Four pairs (one pair per axis)

Type: Differential, RS422 compatible,
Max. Pulse rate: 4 MHz (4,000,000 pulses per second)
Pulse Width: Min. 120 ns, Max. 50 μS


Digital I/O

The Digital I/O are powered by 5Vdc or 24Vdc external source

Safety Inputs:
Eight, two per axis
Type: Single-ended, opto-isolated. Configurable by the user as either source (default) or sink, 5 Vdc ±10% or 24 Vdc ±20%
Max. input current <14 mA
Digital Inputs:
Eight General purpose inputs:
Type: 5Vdc or 24Vdc, single-ended, sink or source (default), opto-isolated.
Input circuit current: <14mA.
Digital Outputs:
Eight General purpose outputs:
Type: 5Vdc or 24Vdc, single ended, sink or source (default), optoisolated, 50mA per output and 400mA for all outputs.


Laser Interface

Pulse differential output, RS422
Fault input, Opto-isolated, 2-terminal
Enable output, Opto-isolate, 2-terminal
Pulse frequency: 9Hz to 1.181Mhz
Pulse width: 6.67ns to 111ms
Duty cycle: 0 to 100%


Operating range: 0 to + 40°C

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



Two EtherCAT ports, In and Out, RJ45 connector.



264 H x 75 W x 25 D (mm3)

Panel or DIN rail mounted



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