VMX2 Series
ANSI Rated Compact Soft Starter
The VMX2 Compact Soft Starter delivers maximum performance in a compact form factor. Field-proven across thousands of installations, it delivers reliable soft starting with all control and protection features built in.
| AC Supply Voltage | 208 – 690 Vac |
| HP Ratings | 3 to 1,500 HP |
| Amp Ratings | 9 to 1,250 Amps |
| Overload Rating | 500% for 60 sec. |
| Enclosure | Module only or NEMA 1 / 12 |
| Rating | ANSI |
Compact Form Factor
Industry-leading compact dimensions for MCCs, pump panels, and retrofit enclosures.
ANSI Rated
Full ANSI rated protection with 500% overload for 60 seconds.
Field Proven
Thousands of installations across all industries worldwide.
iERS Energy Savings
Intelligent Energy Recovery System as standard on all units.
VMX2 / VMX Compact Series
Technical Specifications
Power Components
6 SCRs in inverse parallel pairs for full phase angle soft start control
1600V PIV rating on all units
RC snubber for dv/dt protection of each SCR pair
Line Voltage Range
200 to 600 VAC, 3 phase +10% / -15% on all units, 50/60 Hz
Current Ratings
18 – 1250A depending on unit selection
Range of each unit is 50–100% of maximum
AC Supply Voltage
User supplied 120VAC +10% / -15% tolerance, 60 Hz
Optional 240VAC 50 Hz control available
Overload Capacity (% of motor FLA)
500% for 60 seconds
Bypass Contactor
Standard on all units
Shunt rated bypass / Line start rated bypass
Start / Stop Control
2-wire Run-Stop using dry contacts
3-wire Start/Stop with built-in seal in contact
N.C. Interlock input (dry contact) for remote devices
Ramp Control (4 built-in)
Voltage Ramp
Voltage Ramp with Current Limit
CLT© Closed Loop Torque Ramp (Current Ramp)
Current Step (current limit only)
Ramp times adjustable 1 – 120 seconds
Current Limit adjustable 200 – 600% of FLA
Start & Run Protection
Two programmable overload trip curves: Class 5 – 30
Manual or automatic reset, remote reset available
Equipment Ground Fault
Residual current method with adjustable trip delay
Phase Imbalance / Loss
5 – 30% current imbalance between any two phases with trip delay
Jog
Dry contact closure selects a non-ramping Jog function at an adjustable torque
Kick Start
10 – 100% starting torque for 0.1 – 2 seconds
Pump-Flex™ Deceleration
Begin Decel 0 – 100% of line voltage
Decel ramp 1 – 60 seconds
End Decel 0 – 1% of Begin setting
Restart Delay Timer
Programmable 1 – 999 seconds after loss of control power for staggered restarts
RS-485 Serial Communications
Up to 247 starters per link
Modbus RTU protocol built-in
Full programming and remote control over the serial link
Operator Interface
Tactile feedback keypad
Easy to read LED display
Run and fault status indicators
Electronic Shear Pin
100 – 300% of motor FLA with trip delay
Motor Duty Cycle Protection
Back-spin/coast-down, starts-per-hour or minimum time between starts lockouts
Restart delay after a power failure
Short Circuit
Trips at 10× unit current rating during run
Checks for shorted load prior to each start
Shorted SCR
Locks out on any single shorted SCR (defeatable) or shunt-trip on multi-SCR shorts / welded bypass
Metering
Monitors phase current, ground current and motor thermal capacity
Phase Rotation
A-B-C, A-C-B or disabled
VMX2 Series
Documentation
- VMX2 Brochure2.26 MB
- VMX2 User Manual – Firmware V1.343.41 MB
- VMX2 User Manual – Firmware V1.373.41 MB
- VMX2 User Manual – Firmware V2.002.89 MB
- VMX2 Quick Start Leaflet337 KB
- VMX2 Quick Start Guide – V1.342.26 MB
- VMX2 Quick Start Guide – V1.372.26 MB
- VMX2 Quick Start Guide – V2.122.26 MB
- VMX Brochure3.53 MB
- VMX Operation and Service Manual1.8 MB
- VMX Dimensions781 KB
- VMX User Manual3.5 MB
- VMX Quick Start Leaflet – English781 KB
- VMX Quick Start Leaflet – Spanish280 KB
- VMX Basic Installation and Quick Startup Manual1.5 MB
VMX2 Series
Software Tools
System Requirements
Windows 10 or higher
Intel Core i3 or equivalent
2 GB RAM minimum
100 MB disk space