Read this document and the documents listed in the Additional Resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to
familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws,
and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required
to be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be
impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the
use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or
software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,
Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous environment,
which may lead to personal injury or death, property damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property
damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.
Identifies information that is critical for successful application and understanding of the product.
Labels may also be on or inside the equipment to provide specific precautions.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to
potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL
Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).
Allen-Bradley, Rockwell Software, Rockwell Automation, and TechConnect are trademarks of Rockwell Automation, Inc.
Trademarks not belong ing to Rockwell Automation are property of their respective companies.
Service ProcedureFor your convenience, the Rockwell Automation Global Manufacturing
Solutions (GMS), provides an efficient and convenient method of servicing
medium voltage products.
Contact your local area support office to make arrangements to have a
qualified service representative come to your facility.
A complete listing of Area Support Offices may be obtained by calling your
local Rockwell Automation Distributor or Sales Office.
For MV SMC-Flex technical support on start-up or existing installations,
contact your Rockwell Automation representative. You can also call
1-519-740-4790 for assistance Monday through Friday from 9:00 a.m.
to 5:00 p.m. (Eastern time zone).
1560E-UM050B-EN-P - June 2013
Preface
1560E-UM050B-EN-P - June 2013
Chapter 1
Product Overview
Manual ObjectivesThis manual is intended for use by personnel familiar with Medium Voltage and
solid-state power equipment. The manual contains material which will allow the
user to operate, maintain and troubleshoot the MV SMC-Flex
controllers. The family consists of the following Bulletin numbers: 1503E,
1560E and 1562E.
DocumentationThe following Rockwell Automation publications provide pertinent
information for the MV SMC-Flex and components:
• MVB-5.0General Handling Procedures for MV Controllers
• 1500-UM055B-EN-PMedium Voltage Controller Two-High Cabinet
(200A/400A) – User Manual
• 1502-UM050C-EN-P400A Vacuum Contactor, Series D
– User Manual
• 1502-UM052B-EN-P400A Vacuum Contactor, Series E
– User Manual
• 1502-UM051C-EN-P800A Vacuum Contactor, Series D and E
– User Manual
• 1560E-SR022A-EN-PMedium Voltage SMC-Flex Controllers
– General Specifications
TM
family of
DescriptionThe MV SMC-Flex is a solid-state, three-phase, AC line controller. It is
designed to provide microprocessor-controlled starting and stopping of
standard three-phase, squirrel-cage induction motors, using the same
control module as the Allen-Bradley Bulletin 150 SMC-Flex.
1503E – OEM Controller
A chassis-mount medium voltage solid-state controller designed to mount in
an OEM or customer supplied structure, and designed to work in conjunction
with an existing or OEM/customer supplied starter. It is comprised of
several modular components, including:
• Frame-mounted or loose power stacks including gate driver boards
This mode has the most general application. The motor is given an initial
torque setting, which is user-adjustable from 0 to 90% of locked-rotor
torque. From the initial torque level, the output voltage to the motor is
steplessly increased during the acceleration ramp time. The acceleration
ramp time is user-adjustable from 0 to 30 seconds. Once the MV SMC-Flex
controller senses that the motor has reached the up-to-speed condition during
the voltage ramp operation, the output voltage automatically switches to
full voltage, and the bypass contactor is closed.
Figure 1.1– Soft Start
%5-"%.0*UNE
1-4Product Overview
Starting Modes (cont.)Selectable Kickstart :
Selectable kickstart provides a power boost at start-up that is user-adjustable
from 0 to 90% of locked rotor torque. The additional power helps motors
generate higher torque to overcome the resistive mechanical forces of some
applications when they are started. The selectable kickstart time is useradjustable from 0.0 to 2.0 seconds.
Kickstart
Kickstart
100%
100%
Initial
Initial
Torque
Torque
Start
Start
Figure 1.2 – Selectable Kickstart
Run
Run
e (seconds)
e (seconds)
Tim
Tim
Current Limit Start ;
This starting mode provides a true current limit start that is used when
limiting the maximum starting current is necessary. The Current Limit level
is user-adjustable from 50% to 600% of the motor's full-load ampere rating,
and the current limit time is user-adjustable from 0 to 30 seconds. Once the
MV SMC-Flex™ controller senses that the motor has reached the up-tospeed condition during the current limit starting mode, the output voltage
automatically switches to full voltage and the bypass contactor is closed.
600%
600%
Percent Full
Percent Full
Load Current
Load Current
50%
50%
Start
Start
e (seconds)
e (seconds)
Tim
Tim
Figure 1.3 – Current Limit Start
%5-"%.0*UNE
:Kickstart is also available with Current Limit Start, Dual Ramp Start and Linear Acceleration.
;The Current Limit Start mode design is based on a motor with a locked-rotor current rating that is 600% of
the full-load current rating.
Product Overview1-5
Dual Ramp Start :
This starting mode is useful for applications that have varying loads (and
therefore varying starting torque requirements). Dual Ramp Start allows
the user to select between two separate Soft Start profiles with separately
adjustable ramp times and initial torque settings.
Percent
Percent
Voltage
Voltage
100%
100%
InitialTorque#2
InitialTorque#2
Initial Torque #1
Initial Torque #1
Start#1
Start#1
mp #
Ramp #
Ra
Ramp #1
Ramp #1
2
2
Time (seconds)
Time (seconds)
Run#1
Run #1
Run#2Start#2
Run #2Start#2
Figure 1.4 – Dual Ramp Start
:Dual Ramp Start is available only with the standard controller.
Full Voltage Start
This starting mode is used for applications requiring across-the-line starting.
The output voltage to the motor will reach full voltage within ¼ second.
100%
100%
Percent
Percent
Voltage
Voltage
e (seconds)
e (seconds)
Tim
Tim
Figure 1.5 – Full Voltage Start
%5-"%.0*UNE
1-6Product Overview
Starting Modes (cont.)Preset Slow Speed
This option can be used in applications that require a slow-speed jog for
general purpose positioning. Preset Slow Speed provides either 7% of
base speed (low) or 15% of base speed (high) settings in the forward
direction. Reverse can also be programmed and offers 10% of base speed
(low) and 20% of base speed (high) settings.
Forward
Forward
Forward
15% – High
15% – High
15% – High
7% – Low
7% – Low
7% – Low
Time (seconds)
Time (seconds)
Time (seconds)
Start
Start
Start
Run
RunRun
10% – Low
10% – Low
10% – Low
20% – High
20% – High
20% – High
Reverse
Reverse
Reverse
Figure 1.6 – Preset Slow Speed Option
Important: Slow speed running is not intended for continuous operation due
to reduced motor cooling. The two starts per hour limitation also applies to
slow speed operation. This option employs a cycle-skipping scheme which
produces limited torque. Applications should be checked with the factory.
%5-"%.0*UNE
Product Overview1-7
Linear Speed Acceleration and Deceleration
The SMC-Flex has the ability to control the motor speed during starting
and stopping maneuvers. A tachometer signal (0 to 5V DC) is required to
perform this start mode. The start time is selectable from 0 to 30 seconds
and determines the time the motor will ramp from 0 speed to full speed.
Kickstart is available with this option.
100%
100%
Motor
Motor
Speed
Speed
RunStop
Start
Start
RunStop
Time (seconds)
Time (seconds)
Figure 1.7 – Linear Speed Acceleration
Linear deceleration does not need to be used, even if linear acceleration is
used. The stop time can be programmed for 0 to 60 seconds. Linear
deceleration cannot brake the motor/load and reduce the stop time.
Note: Consult factory if settings over 30 seconds are required. The base
rating of the MV SMC-Flex is two starts (or one start/stop combination)
per hour, thirty seconds maximum for each operation. A stopping operation
counts as a start for purposes of thermal capacity calculations.
A T T E N T I O NA T T E N T I O N
Linear Deceleration is not intended to be used as an
emergency stop. Such usage may result in severe injury
or death. Refer to the applicable standards for
emergency stop requirements.
This feature can be used in applications that require an extended coast-torest time. The voltage ramp-down time is user-adjustable from 0 to 60
seconds and is adjusted independently from the starting time. The load
will stop when the output voltage drops to a point where the load torque is
greater than the developed motor torque.
Percent
Percent
Voltage
Voltage
100%
100%
Initia
Initia
Torque
Torque
l
l
Kickstart
Kickstart
Coast-to-rest
Coast-to-rest
Soft Stop
Soft Stop
Start
Start
Time
Time
Run
Run
(seconds)
(seconds)
SoftStop
SoftStop
Figure 1.8 – Soft Stop Option
Note: Consult factory if settings over 30 seconds are required. The base
rating of the MV SMC-Flex is two starts (or one start/stop combination)
per hour, thirty seconds maximum for each operation. A stopping operation
counts as a start for purposes of thermal capacity calculations.
A T T E N T I O NA T T E N T I O N
Soft Stop is not intended to be used as an emergency
stop. Such usage may result in severe injury or death.
Refer to the applicable standards for emergency stop
requirements.
%5-"%.0*UNE
Product Overview1-9
Protection and DiagnosticsThe MV SMC-Flex™ controller is capable of providing the following
protective and diagnostic features:
Overload
The MV SMC-Flex controller meets applicable requirements as a motor
overload protection device. Thermal memory provides added protection
and is maintained even when control power is removed. The built-in
overload algorithm controls the value stored in Parameter 12, Motor
Thermal Usage (see Chapter 4, Programming). An Overload Fault will
occur when this value reaches 100%. The parameters below provide
application flexibility and easy setup.
ParameterRange
Overload ClassOff, 10, 15, 20, 30
Overload ResetManual – Auto
Motor FLC1.0 – 1000.0 amps
ServiceFactor0.01–1.99
Important: During slow speed operations, current waveforms exhibit
non-sinusoidal characteristics. These non-sinusoidal characteristics
inhibit the controller's current-measurement capability. To compensate
for additional motor heating that may result, the controller uses motor
thermal modeling, which increments motor thermal usage. This compensation takes place when the Preset Slow Speed option is used.
Notes:
1. The factory default setting for Overload Class, which is "OFF", disables
overload protection. An overload trip class and the motor's full-load
current rating must be programmed to enable overload protection.
2. If the MV SMC-Flex is used to control a multi-speed motor, or more
than one motor, the Overload Class parameter must be programmed
to "OFF" and separate overload relays must be supplied for each
speed/motor.
3. Automatic reset of an overload fault requires the start input to be
cycled in a 2-wire control scheme.
4. The trip rating is 117% of the programmed FLC.
Figures 1.9 and 1.10 provide the overload trip curves for the available trip
classes.
%5-"%.0*UNE
1-10Product Overview
Protection and Diagnostics
(cont.)
Class 10
Class 10
1000.0
1000.0
1000.0
100.0
100.0
100.0
10.0
10.0
10.0
1.0
1.0
1.0
Approximate Trip Time (seconds)
Approximate Trip Time (seconds)
Approximate Trip Time (seconds)
0.1
0.1
0.1
Class 10
11023987654
11023987654
11023987654
Multiples of FLC
Multiples of FLC
Multiples of FLC
10000.0
10000.0
10000.0
1000.0
1000.0
1000.0
100.0
100.0
100.0
10.0
10.0
10.0
Approximate Trip Time (seconds)
Approximate Trip Time (seconds)
Approximate Trip Time (seconds)
1.0
1.0
1.0
11023987654
11023987654
11023987654
Class 15
Class 15
Class 15
Multiplesof FLC
Multiplesof FLC
Multiplesof FLC
10000.0
10000.0
10000.0
1000.0
1000.0
1000.0
100.0
100.0
100.0
10.0
10.0
10.0
ApproximateTripTime (seconds)
ApproximateTripTime (seconds)
ApproximateTripTime (seconds)
1.0
1.0
1.0
11023987654
11023987654
11023987654
Multiples of FLC
Multiples of FLC
Multiples of FLC
Class 20
Class 20
Class 20
10000.0
10000.0
10000.0
1000.0
1000.0
1000.0
100.0
100.0
100.0
10.0
10.0
10.0
Approximate Trip Time (seconds)
Approximate Trip Time (seconds)
Approximate Trip Time (seconds)
1.0
1.0
1.0
11023987654
11023987654
11023987654
Class 30
Class 30
Class 30
Multiples of FLC
Multiples of FLC
Multiples of FLC
Approximate trip time for 3-phase balanced
Approximate trip time for 3-phase balanced
Approximate trip time for 3-phase balanced
condition from cold start.
condition from cold start.
condition from cold start.
100000
100000
1000
1000
100
100
Seconda
Seconda
10
10
1
1
Approximate trip time for 3-phase balanced
Approximate trip time for 3-phase balanced
Approximate trip time for 3-phase balanced
condition from hot start.
condition from hot start.
condition from hot start.
Figure 1.9 – Overload Trip Curves
Auto Reset Times:
Auto Reset Times:
Class 10 = 90 s
Class 10 = 90 s
Class 15 = 135 s
Class 15 = 135 s
Class 20 = 180 s
Class 20 = 180 s
Class 30 = 270 s
Class 30 = 270 s
Class10
Class10
Class 10
Class15
Class15
Class 15
Class20
Class20
Class 20
Class30
Class30
Class 30
%5-"%.0*UNE
0
0
100%1000%
100%1000%
Percent Full Load Current Setting
Percent Full Load Current Setting
Figure 1.10 – Restart Trip Curves after Auto Reset
Product Overview1-11
Underload :
Utilizing the underload protection of the MV SMC-Flex controller, motor
operation can be halted if a sudden drop in current is sensed.
The MV SMC-Flex controller provides an adjustable underload trip setting
from 0 to 99% of the programmed motor full load current rating. Trip
delay time can be adjusted from 0 to 99 seconds.
: Underload protection is disabled during slow speed and braking operations.
Undervoltage ;
Utilizing the undervoltage protection of the MV SMC-Flex, motor operation
can be halted if a sudden drop in voltage is detected.
The MV SMC-Flex controller provides an adjustable undervoltage trip
setting from 0 to 99% of the programmed motor voltage. Trip delay time
can be adjusted from 0 to 99 seconds.
Note: For medium voltage applications, undervoltage protection should be
set from 80 to 99%.
An alarm (pre-fault) indication level can be programmed to indicate the
unit is getting close to faulting. The alarm modification information is
displayed through the LCD, HIM, Communication (if applicable) and
alarm contact closing.
Overvoltage ;
Utilizing the overvoltage protection of the MV SMC-Flex, motor operation
can be halted if a sudden increase in voltage is detected.
The MV SMC-Flex controller provides an adjustable overvoltage trip
setting from 0 to 199% of the programmed motor voltage. Trip delay time
can be adjusted from 0 to 99 seconds.
Note: For medium voltage applications, overvoltage protection should be
set from 100 to 115%.
An alarm (pre-fault) indication level can be programmed to indicate the
unit is getting close to faulting. The alarm modification information is
displayed through the LCD, HIM, Communication (if applicable) and
alarm contact closing.
;Undervoltage, overvoltage, and voltage unbalance protection are disabled during braking operation.
%5-"%.0*UNE
1-12Product Overview
Protection and Diagnostics
(cont.)
Unbalance :
The MV SMC-Flex is able to detect an unbalance in line voltages. Motor
operation can be halted if the unbalance is greater than the desired range.
The MV SMC-Flex controller provides an adjustable unbalance setting
from 0 to 25% of the line voltages. Trip delay time can be adjusted from 0
to 99 seconds.
An alarm (pre-fault) indication level can be programmed to indicate the
unit is getting close to faulting. The alarm modification information is
displayed through the LCD, HIM, Communication (if applicable) and
alarm contact closing.
:Undervoltage, overvoltage, and voltage unbalance protection are disabled during braking operation.
Stall Protection and Jam Detection
The MV SMC-Flex controller provides both stall protection and jam
detection for enhanced motor and system protection.
• Stall protection is user-adjustable from 0.0 to 10.0 seconds (enabled only
after the programmed start time expires).
• An alarm (pre-fault) indication level can be programmed to indicate the
unit is getting close to faulting. The alarm modification information is
displayed through the LCD, HIM, Communication (if applicable) and
alarm contact closing.
• Jam detection allows the user to determine the jam level (up to 1000% of
the motor's full-load current rating) and the delay time (up to 99.0 seconds)
for application flexibility.
600%
600%
Percent
Percent
FullLoad
FullLoad
Current
Current
ProgrammedStartTimeStall
Programmed StartTimeStall
Time(seconds)
Time (seconds)
Figure 1.11 – Stall Protection
%5-"%.0*UNE
Percent
Percent
FullLoad
FullLoad
Current
Current
600%
600%
Running
Running
Time(seconds)
Time (seconds)
Figure 1.12 – Jam Detection :
Jam
Jam
Product Overview1-1
UserProgrammed
User Programmed
TripLevel
Trip Level
:
Jam Detection is disabled during slow speed and braking operation.
Ground Fault
In isolated or high impedance-grounded systems, core-balanced current
sensors are typically used to detect low level ground faults caused by
insulation breakdowns or entry of foreign objects. Detection of such
ground faults can be used to interrupt the system to prevent further damage,
or to alert the appropriate personnel to perform timely maintenance.
The MV SMC-Flex’s ground fault detection capabilities consist of using a
core balance current transformer for 1 to 5A core-balanced ground fault
protection with the option of enabling Ground Fault Trip, Ground Fault
Alarm, or both (a core balance CT is provided with 1562E units).
Ground Fault Trip
The MV SMC-Flex will trip with a ground fault indication if:
• No trip currently exists
• Ground fault protection is enabled
• GF Inhibit Time has expired
• GF Current is equal to or greater than the GF Trip Level for a time
period greater than the GF Trip Delay
Parameter 75, Gnd Flt Inh Time, allows the installer to inhibit a ground
fault trip from occurring during the motor starting sequence and is
adjustable from 0 to 250 seconds.
%5-"%.0*UNE
1-14Product Overview
Protection and Diagnostics
(cont.)
Ground Fault Trip (cont.)
Parameter 74, Gnd Flt Delay, allows the installer to define the time period
a ground fault condition must be present before a trip occurs. It is
adjustable from 0.1 to 25 seconds.
Parameter 73, Gnd Flt Level, allows the installer to define the ground
fault current at which the MV SMC-Flex will trip. It is adjustable from
1.0 to 5.0 A.
Important: The ground fault inhibit timer starts after the maximum phase
of load current transitions from 0 A to 30% of the device’s minimum FLASetting or the GF Current is greater than or equal to 0.5 A. The MV
SMC-Flex does not begin monitoring for a ground fault condition until the
Gnd Flt Inh Time expires.
Ground Fault Alarm
The MV SMC-Flex will indicate a Ground Fault Alarm if:
• No warning currently exists
• Ground fault alarm is enabled
• GF Inhibit Time has expired
• GF Current is equal to or greater than the Gnd Flt A Lvl
Parameter 77, Gnd Flt A Lvl, allows the installer to define the ground fault
current at which an alarm will be indicated. It is adjustable from 1.0 to 5.0 A.
Parameter 78, Gnd Flt A Dly, allows the installer to define the time period
a ground fault alarm condition must be present before a trip occurs. It is
adjustable from 0.1 to 25 seconds.
Thermistor/PTC Protection
The MV SMC-Flex provides terminals 23 and 24 for the connection of
positive temperature coefficient (PTC) thermistor sensors. PTC sensors are
commonly embedded in motor stator windings to monitor the motor
winding temperature. When the motor winding temperature reaches the
PTC sensor’s temperature rating, the PTC sensor’s resistance transitions
from a low to high value. Since PTC sensors react to actual temperature,
enhanced motor protection can be provided to address such conditions as
obstructed cooling and high ambient temperatures.
The following table defines the MV SMC-Flex PTC thermistor input and
response ratings:
%5-"%.0*UNE
Product Overview1-15
Table 1.A – PTC Input R atings
Response Resistance3400Ω ± 150 Ω
Reset Resistance1600 Ω ± 100 Ω
Short-circuit Trip Resistance25 Ω ±10Ω
Maximum Voltage at PTCTerminals (R
Maximum Voltage at PTCTerminals (R
Maximum Number of Sensors6
Maximum Cold Resistance of PTC Sensor Chain1500 Ω
Response Time800 ms
=4kΩ)<7.5V
PTC
= open)30V
PTC
The following figure illustrates the required PTC sensor characteristics,
per IEC-34-11-2.
4000
4000
4000
4000
1330
1330
1330
1330
550
550
550
550
250
250
250
250
100
100
100
100
20
20
20
20
10
10
10
10
-20°C
-20°C
0°C
0°C
TNF-20K
TNF-20K
TNF- 5K
TNF- 5K
TNF
TNF
TNF+15K
TNF+15K
TNF+ 5K
TNF+ 5K
Figure 1.13 – PTC Sensor Characteristics per IEC-34-11-2
PTC Trip
The MV SMC-Flex will trip with a PTC indication if:
• No other fault currently exists
• PTC protection is enabled
• The resistance across terminals 23 and 24 is either greater than the
relay’s response resistance or less than the short-circuit trip resistance.
%5-"%.0*UNE
1-16Product Overview
Protection and Diagnostics
(cont.)
Open Gate
An open-gate fault indicates that improper SCR firing, typically caused by
an open SCR gate or driver system, has been detected on one of the power
poles. Before the controller shuts down, it will attempt to start the motor a
total of three times (or as programmed in Parameter 82).
An open gate is detected when the module sends a gate signal to the SCRs
but does not detect that they turned on. SCR turn-on is detected when the
voltage across the leg (L-T) collapses.
Line Faults
The MV SMC-Flex™ controller continually monitors line conditions for
abnormal factors. Pre-start protection includes:
•Line Fault (with phase indication)
– Line voltage loss
– Missing load connection
– Shorted SCR
Running protection includes:
•Line Fault (no phase indication)
– Line voltage loss
– Missing load connection
Phase reversal protection
:Phase reversal protection is functional only at pre-start.
: can be toggled either ON or OFF.
%5-"%.0*UNE
Product Overview1-17
Excessive Starts/Hour
The MV SMC-Flex™ module allows the user to program the desired
number of starts per hour (up to 99). This helps eliminate motor stress
caused by repeated starting over a short time period.
Note: The base rating of the MV SMC-Flex is two starts (thirty seconds
each max.) per hour. Applications requiring more frequent starts, or longer
duration starts, should be reviewed with the factory to avoid equipment damage.
Overtemperature
The power module temperature is monitored during starting and stopping
maneuvers by thermistors. The thermistor is connected to the gate driver
board where it is processed, and the status is transmitted by fibre-optic
cable through the interface board to the control module. When an
overtemperature condition exists (>85°C), the control module trips and
indicates a "PTC Power Pole" fault.
An overtemperature condition could indicate high ambient temperature,
overloading or excessive cycling. After the power module temperature is
reduced to allowable levels, the fault can be cleared (see page 9-1 for
instructions).
MeteringPower monitoring parameters include:
•Three-phase current
•Three-phase voltage
•Power in MW
•Power usage in MWh
•Power factor
•Motor thermal capacity usage
•Elapsed time
•Motor speed (100%, with use of optional tachometer input)
Notes:
1. Voltage measurement is not available during the braking operation of
the SMB Smart Motor Braking, Accu-Stop, and Slow Speed with
Braking control options.
2. The elapsed time and MWh values are automatically saved to memory
every 12 hours.
3. Motor thermal capacity usage is determined by the built-in electronic
thermal overload. An overload fault occurs when this value reaches
100%.
%5-"%.0*UNE
1-18Product Overview
CommunicationA serial interface port (DPI) is provided as standard, which allows
connection to the Bulletin 20-HIM LCD human interface modules.
DPIDPI
Figure 1.14 – DPI Location
A T T E N T I O NA T T E N T I O N
Two peripheral devices can be connected to the DPI.
The maximum output current through the DPI is 280 mA.
ProgrammingSetup is easy with the built-in keypad and three-line, sixteen-character
backlit LCD. Parameters are organized in a three-level menu structure,
using a text format for straightforward programming.
Port 5 –DPI Communications
Port 5 –DPI Communications
Port 2
Port 2
%5-"%.0*UNE
Ports 2 and 3 when two HIMs
Ports 2 and 3 when two HIMs
are connected with a splitter
are connected with a splitter
Figure 1.15 – Built-in Keypad and LCD
Product Overview1-19
Status IndicationFour programmable hard contact outputs are provided as standard:
• The Auxiliary #1 Contact is N.O. It is always programmed for
Up-to-speed to control the bypass contactor in MV applications.
• The fault Contact is for fault indication and is programmable for N.O./N.C.
• The alarm Contact is for alarm indication and is programmable for N.O./N.C.
• The Auxiliary #2 Contact is for normal indication and is programmable
for N.O./N.C. For MV applications, it is configured as N.O. to control
the line contactor.
111213141516171819202122
111213141516171819202122
SMC-Flex
SMC-Flex
Control Terminals
Control Terminals
232425262728293031323334
232425262728293031323334
PTC
PTC
Input
Input
TACH
TACH
Input
Input
Ground
Ground
Fault
Fault
Fault
Fault
Contact
Contact
Aux#1
Aux#1
Up-to-Speed
Up-to-Speed
Alarm
Alarm
Contact
Contact
Aux #2
Aux #2
Normal
Normal
Figure 1.16 – Control Terminals
Control OptionsThe MV SMC-Flex™ controller offers the control options described below.
Important: The options listed in this section are mutually exclusive and
must be specified when ordering. An existing controller may be upgraded
to another control option by replacing the control module and possibly other
components. Consult your nearest Rockwell Automation sales office.
Pump Control Option
This option reduces surges during the starting and stopping of a centrifugal
pump by smoothly accelerating and decelerating the motor. The microprocessor analyzes the motor variables and generates commands that control
the motor and reduce the possibility of surges occurring in the system.
The motor current will vary during the acceleration period, and may be
near the motor rated starting current. The pump algorithm does not limit
starting current since full voltage is needed to reach full speed with a
loaded motor.
The starting time is programmable from 0-30 seconds, and the stopping
time is programmable from 0-120 seconds.
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1-20Product Overview
Control Options (cont.)Pump Application Considerations
1. Consult factory if start time settings over 30 seconds are required.
The base rating of the MV SMC-Flex is two starts (or one start/stop
combination) per hour, thirty seconds maximum for each operation.
A st o pping operation counts as a start for purposes of thermal capacity
calculations.
2. The Pump Control option functions only for centrifugal pumps. It is
not suited for positive displacement, piston, or other types of pumps.
3. The Pump Stop option functions only for a centrifugal pump running
at greater than approximately 2/3 of the motor rated horsepower.
4. Pump applications with input and/or output valves that are closed during
starting and/or stopping may not benefit from the Pump Control option.
Consult the factory for applications with valves.
5. For starting or stopping times longer than 15 seconds, power fuse
selection should be reviewed to ensure no element damage occurs.
The fuse minimum melting time-current characteristic curve should
be consulted to ensure that, at 1.1 times the full voltage locked rotor
current of the motor, the actual starting or stopping time does not
exceed 75% of the fuse melting time.
6. Motor overload and/or upstream breaker settings may have to be
adjusted to allow the starting or stopping current to flow for extended
periods.
100%
100%
Motor
Motor
Speed
Speed
PumpStartRunPumpStop
Pump StartRunPump Stop
Ti
me (seconds)
me (seconds)
Ti
Figure 1.17 – Pump Control Option
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