CSX Soft Starter

A simple solution for your soft start needs.

CSX soft start controllers are a reliable, easy to use soft start solution for your motor. Designed for maximum simplicity, these compact starters provide timed voltage ramp soft start and soft stop, and are perfect for fitting into your existing motor control centre.

The CSX’s small size and integrated bypass relays make installation easy, and allow the soft starter to fit in compact enclosures with limited ventilation. Configuration is as simple as three rotary switches, and remote display and communication options allow trouble-free integration into common control networks.

CSX Soft Starter

Compact size

The CSX is a compact and lightweight unit, so it is suitable for installation in small spaces and is the ideal replacement for older starters.

Easy-to-use adjustments

The CSX is easy to configure, with three simple adjustments. Select the initial start voltage, start ramp time and stop ramp time (if required), and the starter is ready to go. Rotary dials allow reliable, repeatable confguration with no need to navigate through a menu and no difficult-to-use dip switches.

Integrated bypass contactors

Integrated bypass contactors simplify installation by reducing the need to select and connect additional equipment. Because the contactors are already contained within the starter, the overall size of the installation is also smaller. Bypassing the starter while the motor is running reduces the amount of heating, so the starter can usually be installed with no additional ventilation.


CSXi soft starters integrate into your existing DeviceNet, Modbus, Profibus or Ethernet network using easy-to-install plug-in communication interfaces. The optional remote operator can be installed to provide remote feedback, including current, temperature and starter status.

Finger Guards

For enhanced personnel safety and protection, AuCom has developed insulating finger guards, which install quickly and easily onto 75 kW ~ 110 kW CSX Series units to provide IP20 protection.

Mains Supply

Mains voltage (L1, L2, L3)
CSX-xxx-V4 3 x 200 VAC ~ 440 VAC (+ 10% / – 15%)
CSX-xxx-V6 3 x 200 VAC ~ 575 VAC (+ 10% / – 15%)
Mains frequency (at start) 45 Hz to 66 Hz
Rated insulation voltage 600 VAC
Form designation Bypassed semiconductor motor starter form 1
Control Voltage (A1, A2, A3)
CSX-xxx-xx-C1 110-240 VAC (+ 10% / – 15%)
or 380-440 VAC (+ 10% / – 15%)
CSX-xxx-xx-C2 24 VAC/VDC (± 20%)
Current consumption (during run) < 100 mA
Current consumption (at power-up)
CSX-xxx-xx-C1 10 A
CSX-xxx-xx-C2 2 A


Start (terminal 01) Normally Open, 300 VAC max
Stop (terminal 02) Normally Closed, 300 VAC max


Main contactor (terminals 13, 14) Normally Open
6 A, 30 VDC resistive / 2 A, 400 VAC, AC11


Degree of protection CSX-007 to CSX-055 IP20
Degree of protection CSX-075 to CSX-110 IP00
Operating temperatures – 10 °C to + 60 °C
Humidity 5% to 95% Relative Humidity
Pollution degree Pollution Degree 3
Vibration IEC 60068 Test Fc Sinusoidal
4 Hz to 13.2 Hz: ± 1 mm displacement
13.2 Hz to 200 Hz: ± 0.7 g

EMC Emission

Equipment class (EMC) Class A
Conducted radio frequency emission 0.15 MHz to 0.5 MHz: < 90 dB (µV)
0.5 MHz to 5 MHz: < 76 dB (µV)
5 MHz to 30 MHz: 80-60 dB (µV)
Radiated radio frequency emission 30 MHz to 230 MHz: < 30 dB (µV/m)
230 MHz to 1000 MHz: < 37 dB (µV/m)

This product has been designed as Class A equipment. Use of this product in domestic environments may cause radio interference, in which case the user may be required to employ additional mitigation methods.

EMC Immunity

Electrostatic discharge 4 kV contact discharge, 8 kV air discharge
Radio frequency electromagnetic field 0.15 MHz to 1000 MHz: 140 dB (µV)
Rated impulse withstand voltage (Fast transients 5/50 ns) 2 kV line to earth, 1 kV line to line
Voltage dip and short time interruption 100 ms (at 40% nominal voltage)
Harmonics and distortion IEC61000-2-4 (Class 3), EN/IEC61800-3

Short Circuit

Rated short-circuit current CSX-007 to CSX-037 5 kA
Rated short-circuit current CSX-045 to CSX-110 10 kA

Heat Dissipation

During Start 3 watts / ampere
During Run 10 watts typical


C-tick IEC 60947
UL / C-UL UL 508
CE IEC 60947
CCC GB 14048.6
Lloyds IEC 60947

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