motortronics VMX2 SERIES Installation manual

MOTORTRONICS
TM
Solid State AC Motor Control
BASIC INSTALLATION
AND
STARTUP GUIDE
208 - 600V, 9 - 1250 Amps, 5 - 1200 HP
VMX2 SERIES COMPACT SOFT STARTER
VMX2

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 2 | P a g e
Table of Contents
Quick Start “Minimum Settings” Guide.....................................................................................................4
Chapter 1: Introduction................................................................................................................................5
General Description, Sizes and Ratings.........................................................................................................5
Dimensions and Weights................................................................................................................................ 6
Chapter 2: Installation..................................................................................................................................8
Receiving, Unpacking and Inspection............................................................................................................. 8
SERVICE WARNING! ....................................................................................................................................8
Mounting Clearances and Cleaning................................................................................................................8
Electrical Connections....................................................................................................................................9
Power Connections ........................................................................................................................................9
Bypass Contactor...........................................................................................................................................9
Power Factor Correction Capacitors .............................................................................................................. 9
Power Terminals ..........................................................................................................................................10
Remote Keypad Mounting............................................................................................................................ 10
Control Connections.....................................................................................................................................11
AC Control Power Supply Connection .........................................................................................................12
Control Fusing..............................................................................................................................................12
Three-Wire Control Connection....................................................................................................................13
Seal In Contact............................................................................................................................................. 13
Two Wire Control: Relay / PLC Connection .................................................................................................13
Interlock Connection.....................................................................................................................................13
Dual Ramp and Jog Features ......................................................................................................................14
Analog Output (4-20mA) .............................................................................................................................. 15
External Overload Relay Connection ........................................................................................................... 15
Fault Signal .................................................................................................................................................. 16
Output (Auxiliary) Relay Contacts ................................................................................................................ 16
Bypass Contactor Control ............................................................................................................................ 17
Chapter 3: Sequence of Operation ...........................................................................................................19
Starting and Stopping...................................................................................................................................19

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 3 | P a g e
Table of Contents - Continued
Chapter 4: Programming ........................................................................................................................... 20
Introduction .................................................................................................................................................. 20
Digital Interface ............................................................................................................................................21
Display and Program Modes........................................................................................................................21
Program Function List..................................................................................................................................24
Auxiliary Output Relay Settings.................................................................................................................... 31
Fault Mode ...................................................................................................................................................32
Chapter 5: Motor Overload Protection .....................................................................................................33
Solid State Overload Protection ................................................................................................................... 33
Manual Reset...............................................................................................................................................34
Automatic Reset...........................................................................................................................................34
Overload Class Trip Curves ......................................................................................................................... 35

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 4 | P a g e
Quick Startup “Minimum Settings” Guide
Your new VMX2 Series Soft Starter is factory preset for a wide variety of applications and often can be used
with minimal adjustment.
Try these initial factory presets first and then adjust or enable the more advanced features to meet
your specific starting needs.
Three Step Process:
1. Connect L1, L2, L3 to power lines and T1, T2, T3 to motor (see page 9)
2. Connect control wires and control power (see pages 11-16)
3. Program motor FLA (see page 23).
Your VMX2 unit is ready to start!
Start-up Check List
MOT OR FLA
(F001) must be
programmed for
unit to operate!
Supply voltage matches the rated supply voltage of the unit.
Horsepower and current ratings of the motor and unit match or the unit is higher
rating.
Initial ramp time and torque adjustments have been checked.
Power lines are attached to the unit input terminals marked L1, L2 and L3 (R, S, T).
Motor leads are connected to the lower terminals marked T1, T2, and T3 (U, V, W).
Appropriate control power is applied
Control connections have been made.
“Power on” light located on the front of the unit turns on when control power is
applied.
Four seven-segment LED readouts are visible.
The motor’s FLA has been programmed in function F001.
The thermal overload is properly set. (Use F003 and F004 to set OL Class.)
The motor area and equipment are clear of people and parts before start-up.
This list provides only the bare minimum settings necessary to make your motor
run, and provides basic levels of motor protection. Safety precautions, listed
further on in this manual, must always be followed. Ramp setting adjustments and
additional protection features may be necessary. Please read further for additional
details.

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 5 | P a g e
Model
Number
Current
Range
Min. - Max.
VMX2-18-BP
9 - 18
VMX2-28-BP
14 - 28
VMX2-39-BP
19 - 39
VMX2-48-BP
24 - 48
VMX2-62-BP
36 - 62
VMX2-78-BP
39 - 78
VMX2-92-BP
46 - 92
VMX2-112-BP
56 - 112
VMX2-150-BP
75 - 150
VMX2-160-BP
80 - 160
VMX2-210-BP
105 - 210
VMX2-275-BP
137 - 275
VMX2-361-BP
180 - 361
VMX2-450-BP
225 - 450
VMX2-550-BP
275 - 550
VMX2-600-BP
300 - 600
VMX2-862-BP
431 - 862
VMX2-900-BP
450 - 900
VMX2-1006-BP
503 - 1006
VMX2-1250-BP
625 - 1250
Chapter 1 - Introduction
General Description
The VMX2 Series is a digitally programmable solid-state reduced voltage soft starter. Its six SCR design
features a voltage/current ramp with an anti-oscillation circuit for smooth load acceleration. The SCRs are
sized to withstand starting currents of 500% for 20 seconds (Standard Duty) and up to 500% for 60 seconds
(Heavy Duty). The VMX2 Series features smooth, stepless ramp control, which reduces motor inrush
current and excessive wear on the mechanical drive train components. The VMX2 Series includes a
programming keypad for setting operating parameters for the ideal starting cycle and protection features,
plus easy to understand diagnostic LEDs.
Starting torque, ramp time, current limit, dual ramp, and Decel control are standard features on the VMX2
Series. By simply adjusting the units’starting torque, ramp time, and current limit functions, the starting
electrical characteristics of the motor can be matched to the mechanical characteristics of the drive train for
controlled acceleration of the load. The VMX2 Series includes solid-state electronic overload protection in
addition to numerous other protective features. It requires 120VAC (220VAC optional) control power and
uses dry contact inputs for Start / Stop control. Programmable auxiliary contacts and provisions for
interlocking are also included.
Sizes and ratings
The Motortronics VMX2 Series starters are current rated controllers.
Max. Amp ratings are for continuous duty and must not be exceeded.
Always check the motor nameplate FLA and Service Factor (if used)
to ensure proper sizing. Each size has an adjustable range of current
from 50% to 100% of the Max Amp rating. Table 1 to the left shows
the Current Ratings available.
Table 1: VMX2 Series selection

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 6 | P a g e
Dimensions and Weights
Table 2: VMX2 Dimensions (subject to change)
Figure 1: VMX2 Dimensions
Enclosure
Model Number
Overall
Mounting
A Inches
(mm)
B Inches
(mm)
C Inches
(mm)
D Inches
(mm)
E Inches
(mm)
F Inches
(mm)
Weight
lbs
(kg)
Panel
(open) with
integral
bypass
contactor
VMX2-18-BP
through
VMX2-48-BP
8.85
(230)
8.00
(203)
6.65
(169.7)
8.06
(204.7)
7.00
(177.8)
0.22
(5.6)
13
(5.9)
VMX2-62-BP
through
VMX2-112-BP
14.00
(355.6)
8.00
(203)
6.65
(169.7)
13.25
(336.6)
6.75
(171.5)
0.28
(7.1)
23
(10.4)
VMX2-150-BP and
VMX2-160-BP
19.00
(487.9)
8.00
(203)
6.65
(169.7)
18.25
(463.6)
6.75
(171.5)
0.28
(7.1)
35
(15.9)
VMX2 -210-BP and
VMX2-275-BP
28.10
(723.9)
12.5
(317.5)
9.1
(229.4)
27.38
(695.5)
10.75
(273.1)
0.40
(10.2)
90
(40.9)
VMX2-361-BP and
VMX2-450-BP
29.30
(744)
12.5
(317.5)
9.1
(229.4)
27.38
(695.5)
10.75
(273.1)
0.40
(10.2)
105
(47.7)
VMX2-550-BP
through
VMX2 -600-BP
329.50
(786.9)
12.5
(317.5)
9.1
(229.9)
27.38
(695.5)
10.75
(273.1)
0.40
(10.2)
120
(55)
VMX2-862-BP
through
VMX2-900-BP
44.25
(1124)
25.5
(647.7)
11.86
(301.3)
43.00
(1092.2)
23.00
(584.2)
0.40
(10.2)
Contact
Factory
VMX2-1006-BP
through
VMX2 -1250-BP
50.77
(1182.6)
25.5
(718.3)
13.28
(332.7)
42.75
(1095.9)
23.24
(590.3)
0.40
(10.2)
Contact
Factory
F dia.
D
E
B
A
C
~ ~
~

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 7 | P a g e
Chapter 2 –Installation
Receiving and Unpacking
Upon receipt of the product, you should immediatelydo the following:
Carefully unpack the unit from the shipping carton and inspect it for shipping damage. If damaged, notify
the freight carrier and file a claim within 15 days of receipt.
Verify that the model number on the unit matches your purchase order.
Confirm that the ratings nameplate on the unit match or are greater than the motors’HP and current rating
with which it is to be used.
Choosing a Location
Proper location of the VMX2 Series is necessaryto achieve specified performance and normal operation
lifetime.
The VMX2 Series should always be installed in an area where the following conditions exist:
Ambient operating temperature:
Panel (open chassis) unit: 0 to 50°C (32 to 122°F)
Enclosed unit: 0 to 40°C (32 to 104°F)
Protected from rain, moisture and dust.
Enclosed units should not be exposed to direct sun.
Humidity: 5 to 95% non-condensing
Free from metallic particles, conductive dust and corrosive gas
Free from excessive vibration (below 0.5G)
Open panel units must be mounted in the appropriate type of enclosure. Enclosure size and type must
be suitable to dissipate heat generated by the soft starter and any other components mounted inside with it.
Units with –BP Bypass Contactors produce less heat than units without. Throughout all sizes, maximum
heat dissipation of the VMX2…-BP Series electronics, contactor coils and fans is less than 50W.
NOTE: This does not include heat generated by cables, lugs or busbars.
Initial Unit Inspection
Make a complete visual check of the unit for damage that may have occurred during shipping and handling.
Do not attempt to continue installation or start up the unit if it is damaged.
Check for loose mechanical assemblies or broken wires which may have occurred during transportation
or handling. Loose electrical connections will increase resistance and cause the unit to function
improperly.
Mounting and Cleaning
When drilling or punching holes in the enclosure, cover the electrical assembly to prevent metal filings from
becoming lodged in areas which can cause clearance reduction or actual electrical shorts. After work is
complete, thoroughly clean, vacuum the area, and re-inspect the unit for foreign material.
SERVICE WARNING!
Do not service equipment with voltage applied! The unit can be the
source of fatal electrical shocks! To avoid shock hazard, disconnect
main power and control power before working on the unit. Warning
labels must be attached to terminals, enclosure and control panel to
meet local codes. Use Lock Out tags such as the one shown when
servicing equipment.

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 8 | P a g e
Clearances
Make sure there is sufficient clearance all around the unit for cooling, wiring, and maintenance purposes. To
conserve panel space, the VMX2 Series - BP models were designed for close clearances of only 1 inch
(25mm) on either side. A minimum clearance of 4 inches (100 mm) on the top and bottom is necessary to
maximize effective airflow and cooling. Also the unit must be installed with its heat sink ribs oriented vertically
and running parallel to the mounting surface. Keep in mind that these are minimums. NEC or local codes may
require more clearance, particularly for the power terminals.
Figure 2: VMX2 minimum mounting clearances
Cleaning:
WARNING!
Remove all sources of power before cleaning the unit.
In dirty or contaminated atmospheres, the unit should be cleaned on a regular basis to ensure proper
cooling. Do not use any chemicals to clean the unit. To remove surface dust use clean, dry compressed
air only, 80 to 100 psi. A three inch, high quality, dry paintbrush is helpful to loosen up the dust prior to
using compressed air on the unit. Do not use wire brushes or other conductive cleaning materials.

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 9 | P a g e
Figure 3:
VMX2 Power Connections
Integral
Bypass
Contactor*
VMX Starter.
Disconnect
or
Circuit
Breaker
Solid State.
Over Load.
MTR
G
R /
L1 T/ L3
S /
L2
U /
T1 W/ T3
V /
T2
Electrical Connections
Power Connections
Referring to local code standards for wire sizing and length, connect
power conductors to the unit input terminals marked L1, L2, L3 (R, S,
T for IEC users). Connection points are bus tabs with pre-drilled
holes (see section 2 of the Advanced Installation, Operation and
Programming Manual). Use appropriate compression or mechanical
lugs for termination to these bus tabs. Avoid routing power wires
over the control board or display. Connect the motor leads to the unit
terminals marked T1, T2, T3 (U, V, W for IEC users). If control power
is present, but line power is disconnected from L1, L2, L3, the
display will show [n3PH] indicating “no 3 Phase”.
Caution! Never interchange input and output connections to
the unit. This could cause excessive voltage in the
control logic circuit and may damage the unit.
Bypass Contactor
Bypass Contactors are integral (built-in) on all VMX2 versions. See
sections 1.2.3, 3.1.3.c and Appendix 4 of the Advanced Installation,
Operation and Programming Manual for more details on contactor
control and overload protection details.
Power Factor Correction Capacitors
Power factor correction capacitors can be connected to motors
controlled by VMX2 Series starters, however they must be off-line
during ramping. Connect PFC capacitors to the Line side of the
starter with a separate capacitor control contactor.
WARNING!
Never connect power factor correction capacitors on the load
side of the unit. The SCRs will be seriously damaged if
capacitors are located on the load side.
Grounding
Connect the ground cable to the ground terminal as labeled on the
unit. Refer to the National Electrical Code or your local Code for the
proper ground wire sizing and be sure that the ground connector is
connected to earth ground. In ungrounded systems, it is not
necessary to connect a ground to the unit however local codes
should always be consulted.

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 10 | P a g e
Power Terminals:
Connection points are bus tabs with pre-drilled holes (see below). Use appropriate compression or
mechanical lugs for termination to these bus tabs.
Suggested wire sizes and tightening torques for factory-supplied connectors for conductors rated for 75C are
shown in the chart below. Always consult local codes and industry standard practices for proper wires sizes to
accommodate voltage drop and ambient conditions.
Table 3: VMX2 Series Wire Ranges and Torque Specifications
Note: TBD = To Be Determined at a later date
Remote Keypad Mounting
The keypad / operator interface unit can be remotely mounted up to 10’ (3 meters) away from the starter, i.e.
on the enclosure door. A remote mounting kit is necessary, which consists of an adaptor plate, a doorframe
for NEMA 12 enclosures and a pre-assembled ribbon cable available in 1-meter length increments. Detailed
assembly instructions and an enclosure cutout template are included with the kit. See Product Selection
Guide for part numbers of the available kits.
Model
Number
Current Range
Min.- Max.
Suggested
Wire Size
AWG
Tightening
Torque
in.-lbs.
Screw /
Bolt Size
Tightening
Torque
Nm
Suggested
Wire Size
ISOmm2
VMX2-18-BP
9 - 18
12
35
1 x M5
(included)
4
6
VMX2-28-BP
14 - 28
10
10
VMX2-39-BP
19 - 39
8
16
VMX2-48-BP
24 - 48
6
16
VMX2-62-BP
36 - 62
4
45
1 x M8
(included)
5
25
VMX2-78-BP
39 - 78
3
35
VMX2-92-BP
46 - 92
2
35
VMX2-112-BP
56 - 112
2
50
VMX2-150-BP
75 - 150
0
80
1 x M8
(included)
9
70
VMX2-160-BP
80 - 160
2/0
95
VMX2-210-BP
105 - 210
4/0
200
1 x 0.38" hole
(M10)
for User supplied
lugs
15
150
VMX2-275-BP
137 - 275
300 kCMIL
185
VMX2-361-BP
180 - 361
500 kCMIL
2 x 150
VMX2-450-BP
225 - 450
2 x 250 kCMIL
2 x 150
VMX2-550-BP
275 - 550
2 x 400 kCMIL
2 x 240
VMX2-600-BP
300 –600
2 x 500 kCMIL
TBD
TBD
TBD
2 x 300
VMX2-862-BP
431 –862
3 x 400 kCMIL
TBD
TBD
TBD
3 x 240
VMX2-900-BP
450 –900
3 x 500 kCMIL
TBD
TBD
TBD
3 x 300
VMX2-1006-BP
503 - 1006
4 x 350 kCMIL
TBD
TBD
TBD
4 x 185
VMX2-1250-BP
625 - 1250
4 x 500 kCMIL
TBD
TBD
TBD
4 x 300
Figure 4
Remote Keypad Mounting Kit
Components
VMX Starter
Adaptor Plate
NEMA12
Door Frame
Ribbon Cable,
1, 2 or 3 Meters
(3.28, 6.56 or 9.84')

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 11 | P a g e
Control Connections
Control connections on the VMX2 Series starter are divided into 2
groups. With the unit oriented vertically, TB1 is a 12-point DC
terminal block (on the left), and TB2 is a 10-point AC terminal block
(on the right side). These are removable terminal blocks for ease of
connection and servicing, and are provided with different spacing
(pitch) between the header pins, so they are not interchangeable.
Following are descriptions of control connection points.
Note:
Terminal numbers are shown on the side of the first and last
terminal of each block. An additional 3 point terminal on the far
left side is for serial communication connections (see section
5.6.10 of the user manual).
Figure 5: Control Terminal Blocks

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 12 | P a g e
AC Control Power Supply Connection
Separate AC Control Power supply is required to power the
electronics of the VMX2 Series starter. The standard is 120VAC, but
240VAC (optional) can be ordered if necessary for your line power
supply configuration. The control voltage must be connected to
terminals marked A1 and A2 of TB-2 as shown in figure 4.2.1 (these
are also Terminal No.’s 21 and 22). This control voltage must be
customer supplied, unless an optional control power transformer
(see table below) has been supplied with the unit.
Control Power Requirements
When sizing a control power transformer for the VMX2…-BP Series
starter use the above chart for minimum sizes or supply capacity.
Any additional control devices powered by the same CPT must be
added to the above values to ensure proper operation of the Bypass
Contactor.
Control Fusing
The output relay contacts (TB2) must be protected from currents in
excess of 5A by either using fuses or other suitable current
protection devices.
A dedicated fault output for use in PLC or interposing relay control is
available on TB1. This opto-isolated Triac switch is rated for 50mA
max., 10-250V AC. Any circuit connected to it must be fused
accordingly.
Table 3: VMX2 Series AC Control Power VA Requirements
VMX2…-BP
Model
PC
Boards
Fans
-BP: Bypass
Contactor
Inrush
-BP: Bypass
Contactor
Sealed
Recommended
minimum
CPT
Rating
VMX2-18 to 48
48
(inc. in PCB)
95
9
100
VMX2-62 to 112
48
(inc. in PCB)
220
17
250
VMX2-150 to 160
48
72
298
12.3
500
VMX2-210 to 276
48
100
380
11.6
500
VMX2-360 to 450
48
150
571
14
750
VMX2-550
48
200
1000
29
1000

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 13 | P a g e
Three-Wire Control Connection
For standard 3-wire control, connect dry (voltage free) contacts for
the Stop / Start buttons as shown on the diagram directly above the
terminal strip. Connect the N.O. contact of the Start button to
Terminal 1 (far left terminal), the common point between the Stop
and Start to Terminal 2 (2nd from left) and the N.C. from the Stop
button to Terminal 3 (3rd from left).
Seal In Contact
The VMX2 Series uses an internally pre-wired “seal-in” contact
around the Start button (Terminals 1 and 2). No external relay or
auxiliary output connection is necessary.
Two Wire Control: Relay / PLC Connection
An alternate connection for automated or unattended operation
replaces the start/stop push buttons by connecting a dry (voltage
free) maintained contact closure between terminals 1 and 3 as
shown in Figure 4.2.3. When this contact is closed, the VMX2 Series
starter will start and run. When it is opened, it is the same as a Stop
command.
Automatic Functions and 2-Wire Control
When using the Auto Reset functions (F052 - F053), special
consideration must be given to using 2-wire control. Refer to
section 5.6.8 for details on using Auto-Reset functions.
Note:
When a maintained contact is used for start/stop, it is advisable
to set the overload relay to the manual reset position. This will
prevent the motor from restarting if the thermal overload trips
and then cools down.
CAUTION!
Control Terminals 1-10 of TB1 are configured using solid state
devices powered internally with a 24VDC power supply. To
prevent damage to the VMX2 Series control board, use dry
(unpowered) contact closures only when connecting to these
terminals.
If existing 120VAC or other powered control circuit must be
interfaced, use isolating relays.
Interlock Connection
TB1 provides a connection point for an external dry (voltage free)
N.C. (Normally Closed) interlock device between terminals 4 and 5.
Examples where this interlock connection would be used include low
oil, high temperature, or excess vibration dropout from user supplied
devices. A factory-installed jumper is provided which allows the
VMX2 Series unit to operate if external interlocks are not used. If this
jumper is removed and an interlock is not used, the VMX2 Series
unit will not function.

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 14 | P a g e
Enabling the Dual Ramp and Jog Features
TB1 includes provisions for enabling the Dual Ramp and Jog functions
by using external contact closures. Both features use a common
+24VDC from Terminal 7. However, they can be used independently of
each other or together. See sections 5.6.2 and 5.6.3 of the user manual
for full function descriptions and setup.
Dual Ramp Command
Closing a dry (voltage free) contact between TB1, terminals 6 and 7
will enable Ramp 2, and the VMX2 Series starter will respond to the
settings for Ramp 2 in F015 - F018. If no contact closure is present,
the VMX2 Series starter defaults to the Ramp 1 parameters (F011 -
F014). See Section 5.6.2.a of the user manual for setup of the Dual
Ramp Feature.
The Dual Ramp feature is useful in instances where the load
changes significantly. Example: a loaded or unloaded conveyor belt.
The characteristics for starting an unloaded conveyor can be
programmed for Ramp 1. The characteristics for starting a loaded
conveyor can be programmed for Ramp 2. Ramp 2 can also be
programmed for Full Voltage / Across-the-Line starting by setting the
ramp time to 0 and Current to 600%.
Dual Ramp is also useful in 2-speed motor applications. Simply use
an auxiliary contact from one of the speed contactors to select Ramp
2 so that separate ramp profiles can be used.
Dual Ramp input can also be configured as a “Remote reset”
(See parameter F113 and associated table)
Jog / Remote Command
Connecting a dry (voltage free) contact between TB1, Terminals 7
and 8 will enable the Jog feature. A Start command (Run Command
or Start button) is required to activate the Jog feature. See Section
5.6.3 for setup of the Jog Function.
The Jog feature can be used for tasks such as lining up machines for
blade or bit changes, or inching belts along to check tracking.
This input is also used to change the function of the Serial
Communications port control through F068. For additional
information, see instructions of that function in section 5.6.11 of the
user manual.
Jog input can be also configured as:
“Remote” (via comm. link) / “Local” (T-strip), Start stop control.
“External Lockout” (N.O.)
“External Lockout” (N.C.)
(See parameter F113 and associated table)
Using Both Commands
It may be useful to initialize the Ramp 2 and Jog command
simultaneously when jogging. If this is the case, terminals 6 and 8
can be jumped together and controlled with one contact closure to
Terminal 7 (the common 24VDC).
Note: Ramp 2 terminals are defaulted
as “External Reset”, see parameter
F113 for other options.
Note: Jog terminals are defaulted as
“External Lockout, Normally Closed”,
see parameter F113 for other options.

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 15 | P a g e
Analog Output (4-20mA)
The VMX2 Series starter provides a 4 to 20 milliamp output signal
that can be set to monitor different parameter values using F108 and
scaled with parameter F109 and F110. See section 5.6.16.
External Overload Relay Connection
If an external Overload Relay (OLR) is used (see Section 3.1.3.c
and Appendix 4), connect the N.C. aux. contact of the OLR
across the Jog input (TB1 terminals 7&8), and re-program the
Jog input for “External Lockout N/C”, by changing F113 per table
in sect 5.6.17.
When the external OLR trips, the contact will open. This indicates
an immediate Overload to the starter, which trips and displays
[LcA, Lcc, or Lcd] depending on operation mode when the
overload trips. If multiple OLRs are used, i.e. multiple motors
controlled by the same VMX2 Series starter, simply wire the Aux
Contacts in series as shown in Figure 4.2.6.a. See Appendix 4 for
additional information.
Note:
This feature is especially useful when using Deceleration Control
because it will immediately shut off power to the motor even if
Deceleration is active. If used this way, the trip indication will be
[LcA, Lcc, or Lcd] depending on the operation mode when the
trip is issued.

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VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 16 | P a g e
Fault Signal
An optically isolated Triac output is dedicated as a fault indicator on
TB1, terminals 11 and 12, labeled “Opto”. The output Triac switch is
rated for 10 - 250VAC, 50 mA (maximum). If the three
programmable Output Auxiliary Relays are being used for other
functions, this output can easily be hooked up to a PLC or small
external relay to provide a Fault signal. This Fault Output operation is
permanently fixed at “Any Trip”, duplicating the relay setting 22 as
shown in Table 5.6.9. of the user manual.
This output is permanently set to this function and is not
programmable.
Output (Auxiliary) Relay Contacts
Three programmable auxiliary relays are on TB2. The VMX2 Series
starter comes with three programmable dry relay output contacts.
Outputs 1 and 2 are Form C (SPDT), with a Common, N.O. and N.C.
Output 3 is a Form A, (SPST), N.O. contact. It is not necessary to
use the programmable output auxiliary relays in the Start / Stop
circuit. An internal seal-in relay is provided elsewhere (see 4.2.2.a).
Motortronics recommends fusing all outputs with external fuses.
The relays are rated for 240VAC, 5 A and 1200 VA.
Factory default settings for these relays are as follows:
AUX 1 - Run / Stop (see F060).This contact changes state upon
a Start command, returns to normal on Stop (or Begin Decel if
active).
AUX 2 - At-Speed / Stop (see F061).This contact changes state
upon the VMX2 Series detecting At-Speed, and returns to
normal on Stop. At-Speed is determined by the VMX2 Series
detecting the current dropping after reaching End-of-Ramp, or a
maximum of 30 seconds after Start.
AUX 3 - Any Trip (see F062) This contact closes when any trip
condition 5 - 21 (as defined in Table 5.6.9 of the user manual)
occurs.
All relays can be reprogrammed for a wide variety of functions.
See Section 5.6.9 of the user manual for additional relay
programming details.

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 17 | P a g e
Bypass Contactor Control
On VMX2…-BP version (and NEMA 12 enclosures) starters, an
internal dedicated connection is used at the factory for automatically
controlling the Bypass Contactor. Field wiring for Bypass Contactor
operation is not required.
Independent Bypass Contactor Control
The VMX2…-BP Series starters use standard industrial
contactors that can be controlled independently of the starter
electronics if necessary. When doing so, it is necessary to size
the starter based upon the ATL (Across-the-Line) selection chart
so that the contactors are rated for ATL duty instead of normal
Shunt Duty. Supplemental overload protection will be required
(see section 3.1.3.c of the user manual).
Units have external terminal blocks marked for this purpose (see
Appendix 4 for drawings). A dry (voltage free) contact closure
between these terminals will close the bypass contactor
immediately. The Bypass Contactor coil voltage is the same as
the control voltage (120VAC unless the optional 240VAC control
is specified), and the voltage on these terminals is the same as
the coil voltage.
No field wiring is necessary to these terminals if this feature
is not used.
For all other styles of VMX2 Series, the At-Speed signaling can be
programmed into any of the three Output relays (section 4.2.8 and
Table 5.6.9 of the user manual).

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 18 | P a g e
No field wiring is necessary to these terminals if this feature is not used.
VMX2 Bypass Control Terminal Location Diagrams
Note: Use these terminals only when separate control of the Bypass Contactor is necessary.
1
2
3
4
5
6
7
8
To BP Aux.
Contact N.C.
To Dry Contact for Manual activation of
bypass contactor (VMX will fault when
bypass is closed).
120V Supply
from A1 &
A2 on TB2
Bypass Control*
Terminals
62 - 160A Units with
integral bypass
To BP Coil.
*
Bypass Control*
Terminals
18 - 48A Units
with integral
bypass
Bypass Control
Terminals
210 - 600A with
integral bypass

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VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 19 | P a g e
Chapter 3 - Sequence of Operation
Starting:
1. Apply three phase power to the unit. The motor should not run until a Start command is applied.
2. Apply control power and check that the “Power On” LED comes on.
3. Status Display should read [0000.] showing no current in Phase A (minor flickering of the first digit is
common).
4. Apply the Start (Run) command. The motor should begin to accelerate. Status display will read Phase A
Amps at an increasing rate.
5. When the motor reaches full speed, the “At Speed” LED comes on and the Bypass Contactor will close.
Status display should show a sharp decrease in Phase A Amps.
6. If the motor does not fully accelerate, decelerates, or stops during the acceleration period, hit the Stop
button immediatelyand open the disconnect line.
Stopping:
If Pump-Flex Decel is Disabled (factory default) in F024:
1. Remove the Run Command (or hit the Stop button).
2. At-Speed LED will go out and Bypass Contactor will open. Status display should read [0000.] indicating
no current on Phase A.
3. Motor will coast to a stop according to load inertia and friction.
If Pump-Flex Decel is Enabled in F024:
1. Remove the Run Command (or hit the Stop button).
2. At-Speed LED will go out and Bypass Contactor will open. Status display should briefly read Phase A
Amps increasing as motor begins to decelerate.
3. Motor should begin to slow down. Status display should begin to show decreasing motor amps.
4. When motor reaches Stop Level, VMX2 should turn off. Status display will again show [0000.]
If the unit does not follow this operational sequence please contact the factory orrefer to the VMX2 Series
TroubleshootingGuide.

Basic Installation and Operation Guide
VMX2 Series Digital Solid State Soft Starters 18 –1250A
VMX2 Quick Setup Guide 20 | P a g e
Chapter 4 –Programming
It is best to operate the motor at its full load starting conditions to achieve the proper time, torque and ramp
settings. Initial factory settings are set to accommodate general motor applications and provide basic motor
protection. Advanced features must be enabled via programming. The only parameter that MUST be set by
the user is motor FLA (F001).
Digital Interface: The VMX2 Series Soft Starter includes a digital keypad with eight LEDs, seven
command keys, and an LED display with four alphanumeric digits.
Figure 6.
Table 5.: VMX2 Series Display Features
Keys
Reset
Clears the Trip indication and releases the Trip Relay.
Fn
Enters or exits the Program Mode.
Up and Down
Arrows
Navigates through the Status Display Mode, scrolls up
and down through the Function List, increases or
decreases the value of the active (flashing) digit and
scrolls through the fault history. When entering values,
holding the key down for more than 2 seconds will
activate Auto-step, which increases its rate the longer the
key is held down.
Right and Left
Arrows
Each key press shifts the active (flashing) digit to the right
or left by one position, allowing you to change higher
values of functions without waiting to Auto-step though
large numbers.
Green
LEDs
Power On
Control power is available at A1 and A2
At
Speed
The motor is at full power and the Bypass Contactor has
been commanded to pull in.
The SCRs are at full conduction and current has dropped.
Yellow
LEDs
Shunt
Trip
Power is flowing to the motor in the Off mode. See section
5.6.8.a of the Advanced Installation, Operation and
Programming Manual for additional information.
Shorted
SCR
There is no voltage drop across at least one SCR phase
assembly, indicating that at least one SCR is shorted.
See section 7 of the Advanced Installation, Operation and
Programming Manual for additional information.
Over
Current
Overcurrent LED lights for three sets of fault conditions:
1) During start, the unit saw current exceed the normal
rate of increase in the first 250ms.
2) During Run, current exceeded either the OC setting in
F042 for the delay set in F043. This LED will be
accompanied by oCA, oCC or oCd on the display.
3) The unit has seen a Short Circuit exceeding 10x FLA
for 12.5ms. This LED will be accompanied by SCA,
SCC or SCD display.
Phase
Loss
One or more of the phase currents dropped below the
threshold during starting or running.
Over
Temp
Starter has tripped due to excess heat sink temperature.
This will automatically reset.
Over
Load
Starter has tripped due to the Thermal Register reaching
0000. The Overload must reset before this fault can be
cleared.
Display
8888.
4 digit 7 segment display with a decimal point on the right
side indicating Phase A.
MOTOR FLA (F001)
must be programmed
for unit to operate!