Take control from the start.

The EMX3 introduces a new generation in soft start technology: XLR-8, Adaptive Acceleration Control. XLR-8 offers an unprecedented level of control over motor’s acceleration and deceleration profiles. Using XLR-8, the soft starter learns the motor’s performance during start and stop, then adjusts control to optimise performance.

The EMX3 soft starter is smart, dependable and easy to use. New design features make the EMX3 the perfect solution for quick set-up or more customised control.

Easy to use.

While soft starters are becoming increasingly feature-rich, AuCom has taken steps to ensure that commissioning, operation and fault finding are still quick and easy. Quick setup mode gets machinery running in next to no time, and informative screens give real-time feedback on motor performance.


The EMX3 soft starter has been designed for maximum flexibility in a wide range of applications. Whether you need to integrate into a network or respond to external signalling equipment, need reliable protection for your motor or just need a compact, versatile and cost-effective motor starting solution, the EMX3 offers the features you need in a product you can trust.

Compact size.

EMX3 starters are amongst the smallest in their class, saving installation costs by minimising panel space requirements. The design of the EMX3 allows for multiple units to be mounted side by side, or in a bank of starters due to the flexibility in cabling options. Internally bypassed starters further reduce the overall size of your installation.


Starting Functions

  • XLR-8 adaptive acceleration
  • Constant current start mode
  • Current ramp start mode
  • Kickstart

Stopping Functions

  • XLR-8 adaptive deceleration
  • TVR soft stop
  • Brake mode
  • Coast to stop


  • Fully customisable protection
  • Motor thermal model
  • Motor thermistor input
  • Phase sequence
  • Undercurrent
  • Instantaneous overcurrent
  • Auxiliary trip input
  • Heatsink overtemperature
  • Excess start time
  • Supply frequency
  • Shorted SCR
  • Power circuit
  • Motor connection
  • RS485 failure
  • Motor overload
  • Current imbalance
  • Ground fault (optional)


  • Large viewable screen, with real-language text.
  • Status LEDs for immediate feedback.
  • Start, stop, reset, local/remote push buttons.
  • IP65 removable keypad.
  • Unique wiring loom separates wires for easy install and allows access from top, left or bottom.
  • Top and bottom cable retainers for tidier wiring.
  • Small footprint and depth saves space.


  • Remote mounting option
  • Status LEDs
  • Easy to read screen
  • Real language feedback
  • Multi-language options
  • Shortcut buttons

Additional features

  • Starter communication timeout
  • Network communication trip
  • Auto detection of inline or inside delta power connection
  • Programmable auto start/stop
  • 24 VDC auxiliary power supply
  • PT100 (RTD) input
  • Real time clock with battery backup
  • PowerThrough - enables the choice of continuous operation despite a power assembly failure. This allows production to continue while long-term remedial action can be taken.
  • Forward and reverse jog function
  • I/O expansion card (optional)


Communication modules

The EMX3 supports network communication using Profibus, Profinet, DeviceNet, Ethernet/IP, Modbus RTU or Modbus TCP protocols, via easy-to-install communication interfaces.

Finger guards

Enhance personnel safety by preventing accidental contact with live terminals. The finger guard kit fits EMX3-0220B to EMX3-1000B and provides IP20 protection when used with cables 22 mm or greater.

Input/output card

Add extra inputs and outputs for advanced integration:

  • 2 x inputs
  • 3 x relay outputs
  • 1 x analog input
  • 1 x analog output

RTD and ground fault

  • 6 x PT100 RTD inputs
  • 1 x ground fault input

To use ground fault protection a 1000:1, 5 VA current transformer is also required.

PC Software

Using AuCom's custom designed WinMaster software you can control, monitor and program your EMX3 from your desktop computer.


Current Range  23 A ~ 1600 A (nominal)
Motor connection  In-line or inside delta
Bypass Integrated internal or external


Mains Voltage (L1, L2, L3)  
 EMX3-xxxx-V4  200 VAC ~ 440 VAC (± 10%)
EMX3-xxxx-V7 380 VAC ~ 690 VAC (± 10%) (in-line connection)
  EMX3-xxxx-V7  380 VAC ~ 600 VAC (± 10%) (inside delta connection)
Control Voltage  (A1, A2, A3) 110 ~ 220 VAC (+ 10% / -15%)
  or 230 ~ 440 VAC (+ 10% / -15%)
Mains Frequency 45 Hz to 66 Hz


Inputs Active 24 VDC, 8 mA approx.
  Start (C23, C24)  Normally open
  Stop (C31, C32) Normally closed
  Reset (C41, C42)  Normally open or closed
Programmable Inputs  
  Input A (C53, C54)  Normally open or closed
Input B (C63, C64)  Normally open or closed
Motor Thermistor (B4, B5)  
PT100 RTD (B6, B7, B8)  


Relay outputs  10 A at 250 VAC resistive
  5 A at 250 VAC, AC15 pf 0.3
  Run Relay (23, 24) Normally Open
Programmable Outputs  
 Relay A (13, 14)  Normally Open
Programmable Outputs  
  Relay A (13, 14)  Changeover
  Relay C (41, 42, 44)  Changeover
 Analog Output (B10, B11)  0-20 mA or 4-20 mA
  24 VDC Output (P24, COM)  200 mA


Ingress protection:  
EMX3-0023B ~ EMX3-0105B  IP20
  EMX3-0145B ~ EMX3-1600C  IP00
Operating temperature  -10 °C ~ 60 °C
Storage temperature  - 10 °C ~ 60 °C
Humidity  5% to 95% Relative Humidity

EMX3 Soft Starter Documentation