Allen-Bradley SMC-50 User manual

SMC-50 Smart Motor Controller
Bulletin150
Quick Start
Original Instructions

Important User Information
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.
Labels may also be on or inside the equipment to provide specific precautions.
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.
IMPORTANT Identifies information that is critical for successful application and understanding of the product.
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).

Rockwell Automation Publication 150-QS003E-EN-P - April 2017 1
Table of Contents
Important User Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table of Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
About This Publication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Terminology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Summary of Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Chapter 1
Installation Enclosures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mounting Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power Lugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Typical Power Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Standard Control Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Control Wiring Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Typical Control Wiring Examples . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Fan Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Integrated Bypass Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Solid-state Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Upgraded Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Option Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Bypass Operation and Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
SMC-50 Controllers with Internal Bypass . . . . . . . . . . . . . . . . . . . 19
SMC-50 Controllers with External Bypass. . . . . . . . . . . . . . . . . . . 19
Chapter 2
Programming Parameter Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Parameter Configuration Using a 20-HIM-A6. . . . . . . . . . . . . . . 23
Basic Parameter Access and Category/File Structure . . . . . . . . . . . . . 24
Parameter Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Category/File Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Quick Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Chapter 3
Operation and Troubleshooting Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Motor Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Motor Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Resistive Load Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Troubleshooting with Diagnostic LEDs. . . . . . . . . . . . . . . . . . . . . . . . . 31
Controller LED Status Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Troubleshooting with Monitoring Equipment. . . . . . . . . . . . . . . . . . . 31
Troubleshooting By Fault Code — Abbreviated Listing . . . . . . . . . . 31

2Rockwell Automation Publication 150-QS003E-EN-P - April 2017
Table of Contents
Appendix A
SCCR Ratings SCCR Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Rockwell Automation Publication 150-QS003E-EN-P - April 2017 3
Preface
About This Publication This quick start guide provides you with the basic information that is required
to install, start up, and program your SMC™-50 Soft Starter.
The SMC-50 soft starter is a reduced voltage soft starter that uses a state-of-
the-art microprocessor- based control module. By using six back-to-back
silicon-controlled rectifiers (SCRs) (two per phase), the SMC-50 soft starter
provides controlled acceleration, operation/run, and deceleration of standard
asynchronous induction motors. Power structures are available with an integral
bypass contactor or without (solid-state).
The information that is provided in this quick start guide does not replace the
user manual. The quick start guide assumes that the installer is a qualified
person with previous experience and basic understanding of electrical
terminology, configuration procedures, required equipment, and safety
precautions.
For safety of maintenance personnel and others who might be exposed to
electrical hazards associated with maintenance activities, follow all local
safety-related work practices (such as NFPA70E, Part II in the United States).
Maintenance personnel must be trained in the safety practices, procedures, and
requirements that pertain to their respective job assignments.
Additional Resources These documents contain additional information concerning related products
from Rockwell Automation.
You can view or download publications at
http://www.rockwellautomation.com/global/literature-library/overview.page.
To order paper copies of technical documentation, contact your local
Allen-Bradley distributor or Rockwell Automation sales representative.
Terminology Throughout this publication, we also refer to the SMC-50 soft starter as the
SMC-50 controller. These terms are interchangeable.
Resource Description
SMC-50 Controller User Manual, publication 150-UM011 Provides comprehensive user information for the SMC-50 controller.
SMC-50 Controller Selection Guide, publication 150-SG010 Provides comprehensive selection information for SMC-50 controller and accessories.
PowerFlex™ 20-HIM-A6 and 20-HIM-C6S HIM (Human Interface Module), publication
20HIM-UM001.Provides comprehensive user information for 20-HIM human interface modules.
Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1 Provides general guidelines for installing a Rockwell Automation industrial system.
Product Certifications website,
http://www.rockwellautomation.com/global/certification/overview.page Provides declarations of conformity, certificates, and other certification details.

4Rockwell Automation Publication 150-QS003E-EN-P - April 2017
Preface
General Precautions
WARNING:
• Only personnel familiar with the controller and associated machinery should plan or implement the installation, startup, and subsequent
maintenance of the system. Failure to do this may result in personal injury and/or equipment damage.
•Hazardous voltage is present in the motor circuit even when the SMC-50 controller is off. To avoid shock hazard, disconnect the main power before
working on the controller, motor, and control devices such as Start-Stop push buttons. Procedures that require parts of the equipment to be
energized during troubleshooting, testing, etc., must be performed by properly qualified personnel, using appropriate local safety work practices
and precautionary measures.
•Failure of solid-state power switching components can cause overheating due to a single-phase condition in the motor. To prevent injury or
equipment damage, the use of an isolation contactor or shunt trip-type circuit breaker on the line side of the SMC controller is recommended. This
device should be capable of interrupting the motor’s locked-rotor current.
•Hazardous voltages that can cause shock, burn, or death are present on L1, L2, L3, T1, T2, and T3. For Internal bypass units, hazardous voltages are
also present on T4, T5, and T6. Power terminal covers for units rated 90…180 A (solid state) and 108…480 A (integrated bypass) can be
installed to prevent inadvertent contact with terminals. Disconnect the main power before servicing the motor controller, motor, or associated
wiring.
ATTENTION:
•Static control precautions are required when you install, test, service, or repair the assembly. The controller contains electrostatic discharge (ESD)
sensitive parts and assemblies. Component damage may result if ESD control procedures are not followed. If you are not familiar with static
control procedures, See applicable ESD protection handbooks.
•Stopping modes, such as braking, are not intended to be used as an emergency stop. You are responsible for determining which stopping mode is
best suited to the application. See the applicable standards for emergency stop requirements.
•Pump and linear deceleration stopping modes may cause motor heating. Depending upon the mechanical dynamics of the system, select the
lowest stopping time setting that satisfactorily stops the motor.
•Slow speed running is not intended for continuous operation. This is due to reduced motor cooling.
•Two peripheral devices can be connected to the direct programming interface (DPI™) port that is located in the control module. The maximum
output current through the DPI port is 560 mA.
NOTE: A Human Interface Module (HIM) located in the control module HIM port/bezel (See Figure 9) also draws power from the DPI port.
•Disconnect the controller from the power source when installing or inspecting protective or capacitor modules. These modules should be
inspected periodically for damage or discoloration. Replace module if it is damaged or the clear sealant or components are discolored.
•Additional considerations may be required for EMC compliance. See SMC-50 Controller User Manual, publication 150-UM011.

Rockwell Automation Publication 150-QS003E-EN-P - April 2017 5
Preface
Perchlorate material – special handling may apply. See www.dtsc.ca.gov/
hazardouswaste/perchlorate.
This perchlorate warning only applies to primary Lithium Manganese Dioxide
(LiMnO2) cells or batteries, and products containing these cells or batteries,
sold or distributed in California, USA.
Summary of Changes This manual includes new information about the SMC-50 controller with
internal bypass option. It also updates and corrects information from previous
revisions.
ATTENTION:
•The controller must be correctly applied and installed. If applied or installed incorrectly, damage to the components or the reduction in product
life may occur. The system may malfunction if the following wiring or application errors occur: undersizing the motor, using an improperly sized
controller, using an incorrect or inadequate AC supply, excessive ambient temperatures, or power quality.
•You must program the Motor Overload parameter to provide proper protection. Overload configuration must be properly coordinated with the
motor.
•This product has been designed and tested as Class A equipment for electromagnetic compatibility (EMC). Use of this product in domestic
environments may cause radio interference, in which case, the installer may need to employ additional mitigation methods.
•Disconnect the controller from the motor before you measure insulation resistance (IR) of the motor windings. Voltages used for insulation
resistance testing can cause silicone-controlled rectifier (SCR) failure. Do not make any measurements on the controller with an insulation
resistance (IR) or Megger tester.
•To protect the Smart Motor Controller (SMC) and/or motor from line voltage surges, protective modules may be placed on the line, load, or both
sides of the SMC controller. Do not place protective modules on the load side of the SMC controller when using an inside-the-delta motor
connection or with pump, linear deceleration, or braking control.
•The controller can be installed on a system with power factor correction capacitors (PFCC). The PFCCs must only be on the line side of the
SMC controller. Installing PFCCs on the load side results in SCR damage and failure.
•The ground fault sensing feature of the SMC-50 controller is intended for monitoring purposes only and not as a ground fault circuit interrupter
for personnel protection as defined in Article 100 of the NEC. The ground fault sensing feature has not been evaluated to UL 1053.
•After a short circuit occurs, you must verify device functionality.
This product contains a sealed lithium battery that may need to be replaced during the life of the product.
At the end of its life, the battery that is contained in this product should be collected separately from any unsorted municipal waste.
The collection and recycling of batteries helps to protect the environment and contributes to the conservation of natural resources as valuable
materials are recovered.
ATTENTION: There is a danger of explosion if the lithium battery or real-time clock module in this product is incorrectly replaced. Do not
replace the battery or real-time clock module unless power has been removed and the area is known to be nonhazardous.
Replace the battery only with an equivalent CR2032 coin-cell battery.
Do not dispose of the lithium battery or real-time clock module in a fire or incinerator. Dispose of used batteries in accordance with local
regulations.
For safety information on the handling of lithium batteries, including handling and disposal of leaking batteries, see Guidelines for Handling
Lithium Batteries, publication AG 5-4.

6Rockwell Automation Publication 150-QS003E-EN-P - April 2017
Preface
Notes:

Rockwell Automation Publication 150-QS003E-EN-P - April 2017 7
Chapter 1
Installation
Enclosures The open-style design of the SMC-50 controller requires that you install it in
an enclosure.
Table 1 - SMC-50 Controller Enclosure Requirements
The guidelines inTable 2 result from the open design of the SMC-50
controller and the requirements of minimum clearance of 150 mm (6 in.)
above and below the controller.
Table 2 - SMC-50 Controller Minimum Enclosure Size
IMPORTANT The ambient temperature (open air) or internal enclosure temperature without
derating must be kept within the specified range. See Table 1.
Enclosure Ratings
Standard Device Rating: IP00 (NEMA Open Type)
Minimum Required Enclosure: IP23 (NEMA Type 1)
Recommended Enclosure:(1)
(1) See Table 2 for minimum enclosure size
IP54 (NEMA Type 12)
Ambient temperature range (open air) or
internal enclosure temperature range
without derating:
Internal Bypass -20…+50 °C (-4…122 °F)
Solid-state -20…+40 ºC (-4…104 °F)
Orientation and Clearance
Mounting Orientation: Vertical ONLY
Minimum Clearance: Horizontal 0 cm (0 in.)
Vertical 15 cm (6 in.)
SMC-50 Controller with Internal Bypass
Catalog Number mm (in.)(1)
(1) Actual enclosure size changes dependent on heat dissipation, duty cycle, ambient temperature, and external cooling.See the
user manual, publication 150-UM011, for more information.
Width Height Depth
150-S108… / 150-S135… 609.6 (24.0) 762.0 (30.0) 304.8 (12.0)
150-S201… / 150-S251… 762.0 (30.0) 965.2 (38.0) 355.6 (14.0)
150-S317… / 150-S361… / 150-S480… 914.4 (36.0) 1295.4 (51.0) 355.6 (14.0)
Solid-state SMC-50 Controller
Catalog Number Configuration mm (in.)(1)
Width Height Depth
150-SB… Line/Wye 609.6 (24.0) 762.0 (30.0) 304.8 (12.0)
Inside-the-Delta 762.0 (30.0) 965.2 (38.0) 355.6 (14.0)
150-SC… All 762.0 (30.0) 965.2 (38.0) 355.6 (14.0)
150-SD… All 914.4 (36.0) 1295.4 (51.0) 355.6 (14.0)

8Rockwell Automation Publication 150-QS003E-EN-P - April 2017
Chapter 1 Installation
Mounting Requirements All units are fan cooled. It is important to locate the controller in a position
that allows air to flow vertically through the power module.
See Table 2 for minimum enclosure dimensions.
When you drill or install near the soft starter, make sure that you take adequate
measures to protect the device from dust and debris, as shown in Figure 1.
Figure 1 - SMC-50 Controller Mounting Protection
IMPORTANT The controller must be mounted in a vertical plane and have a minimum of 6 in.
(150 mm) free space above and below the controller. Horizontal mounting of the
SMC-50 controller is not allowed. Enclosure must be sized such that the enclosure’s
internal temperature remains within specified controller ratings.

Rockwell Automation Publication 150-QS003E-EN-P - April 2017 9
Installation Chapter 1
Dimensions Dimensions are in millimeters (inches). All dimensions are approximate and
are not intended for manufacturing purposes. For complete dimension
drawings, see the user manual, publication 150-UM011, or consult your local
Rockwell Automation sales office or Allen-Bradley distributor.
Figure 2 - SMC-50 Soft Starter with Integral Bypass
A
B
Cat. No. Height (B) Width (A) Depth (C) Approximate Shipping
Weight
150-S108… / 150-S135… 443.7 (17.47) 196.4 (7.74) 217.3 (8.56) 15.4 kg (34.0 lb)
150-S201… / 150-S251… 560.0 (22.05) 225.0 (8.86) 277.4 (10.92) 30.8 kg (68.0 lb)
150-S317… / 150-S361… / 150-S480… 600.0 (23.62) 290.0 (11.42) 310.1 (12.21) 46.2 kg (102 lb)

10 Rockwell Automation Publication 150-QS003E-EN-P - April 2017
Chapter 1 Installation
Figure 3 - Solid-state SMC-50 Soft Starter
Power Wiring See the product nameplate or the SMC-50 controller user manual, publication
150-UM011, for device-specific information.
SMC-50 controller power structures use solid-state SCR designs that are
capable of interfacing with 200...480V AC or 200...690V AC (690V line and
600V inside-the-delta) motors. Both the internally bypassed and solid-state
power structures are available. Verify ratings of unit before application.
The power structure incorporates three-phase true current-sensing and
overtemperature protection. You can use an external bypass contactor if it is
required for your application.
Conductor range, torque, lug, and delta distribution block lug kit information
is provided in Table 3 through Table 6. Figure 4 supplies typical power wiring
diagrams.
A
B
Cat. No. Height (B) Width (A) Depth (C) Approximate Shipping Weight
150-SB… 396.6 (15.62) 194.4 (7.65) 259.2 (10.21) 15.7 kg (34.6 lb)
150-SC… 638.5 (25.14) 273.1 (10.75) 272.9 (10.75) 47.6 kg (105 lb)
150-SD… 692.2 (27.25) 457.2 (18.00) 295.8 (11.64) 77.1 kg (170 lb)
ATTENTION: SMC-50 controllers can be installed in a system with power
factor correction capacitors (PFCCs). The PFCCs must only be on the line side
of the controller. Placing the PFCCs on the load side of the SMC results in
damage to the SCRs in the SMC-50 controller. For additional details, see the
user manual, publication 150-UM011.

Rockwell Automation Publication 150-QS003E-EN-P - April 2017 11
Installation Chapter 1
Power Lugs Power lugs are required for devices rated 108…480 A (internal bypass) and
90…520 A (solid-state). These lugs are sold in kits. Each kit contains three lugs.
Table 3 through Tabl e 6 list the number and type of lugs required.
Table 3 - SMC-50 Integrated Bypass Devices Connection Lug Information for Line/Wye
Connected Motors
Table 4 - SMC-50 Integrated Bypass Devices Connection Lug Information for Inside-the-Delta
Connected Motors
Table 5 - Solid-state SMC-50 Controller Power Wiring Information, Line/Wye and
Inside-the-Delta Configurations
Table 6 - Solid-state SMC-50 Controller Delta Distribution Block Wiring Information
Cat. No. Rating [A] Lug Kit
Cat. No.
Wire Strip
Length [mm] Conductor Range Max No. Lugs/Pole Tightening Torque
Line Side Load Side Wire - Lug Lug - Busbar
150-S108…, 150-S135… 108…135 199-LF1 18…20 16…120 mm2
(#6…250 MCM) 1131 N•m (275 lb•in)
17 N•m
(150 lb•in)
150-S201…, 150-S251… 201…251 199-LF1 18…20 16…120 mm2
(#6…250 MCM) 2231 N•m (275 lb•in)
23 N•m
(200 lb•in)
150-S317…, 150-S361…, 150-S480… 317…480 199-LG1 18…25 25…240 mm2
(#4…500 MCM) 2242 N•m (375 lb•in)
28 N•m
(250 lb•in)
Cat. No. Rating [A] Lug Kit
Cat. No. Conductor Range Max No. Lugs/Pole Tightening Torque
Line Side Wire - Lug Lug - Busbar
150-S108…, 150-S135… 187…234 1494R-N15 25…240 mm2
(#4…500 MCM) 142 N•m (375 lb•in)
17 N•m
(150 lb•in)
150-S201…, 150-S251… 348…435 1494R-N14 50…120 mm2
(1/0…250 MCM) 231 N•m (275 lb•in)
23 N•m
(200 lb•in)
150-S317…, 150-S361…, 150-S480… 549…831 150-LG5MC 95…240 mm2
(3/0…500 MCM) 134 N•m (300 lb•in)
28 N•m
(250 lb•in)
Cat. No. Rating [A] Lug Kit
Cat. No.
Wire Strip
Length [mm] Conductor Range Max No. Lugs/Pole Tightening Torque
Line Side Load Side Wire - Lug Lug - Busbar
150-SB… 90…180 (Line/Wye)
155…311 (Delta) 199-LF1 18…20 16…120 mm2 (#6…250 MCM) 1131 N•m (275 lb•in)
23 N•m
(200 lb•in)
150-SC… 210…320 (Line/Wye)
363…554 (Delta) 199-LF1 18…20 16…120 mm2 (#6…250 MCM) 2231 N•m (275 lb•in)
23 N•m
(200 lb•in)
150-SD… 361…520 (Line/Wye)
625…900 (Delta) 199-LG1 18…25 25…240 mm2 (#4…500 MCM) 2242 N•m (375 lb•in)
28 N•m
(250 lb•in)
Cat. No. Tightening Torque Quantity Conductor Range Wire Strip Length [mm] Lug Kit Cat. No.
Line Load Line Load Line Load
150-SB… 42 N•m
(375 lb•in.) 325…240 mm2 (#4…500 MCM) 35 35 Allen-Bradley 1492-BG
150-SC… 67.8 N•m
(600 lb•in.)
31 N•m
(275 lb•in.) 154…400 mm2 (1/0…750 MCM)
16…120 mm2
(#6…250 MCM) 45 Top Row = 23 Bottom Row = 48
Marathon Special
Products 1353703
150-SD… 67.8 N•m
(600 lb•in.)
67.8 N•m
(600 lb•in.) 354…400 mm2 (1/0…750 MCM)
54…400 mm2
(1/0…750 MCM) 45 45 Marathon Special Products 1352702

12 Rockwell Automation Publication 150-QS003E-EN-P - April 2017
Chapter 1 Installation
Typical Power Diagrams
Figure 4 - Power Wiring Diagrams
(1) Contactor must be fully rated for motor Hp/kW and FLA.
(2) For North American applications, size the contactor per the motor Hp and FLA. For IEC applications, size the contactor per the
motor AC-1 or AC-3 rating. The short-circuit rating of the contactor must be similar to that of the SMC-50.
T1 T2 T3
K1
L1 L2 L3
K1
L1 L2 L3
T4
T5
L1 L2 L3
K1
T1 T2 T3 T4 T5
T6
L1 L2 L3
135
246
135
246
W
1
U
1
135
L1 L2 L3
135
246
135
246
K1
W
2
U
2
V
2
L1 L2 L3
135
135
246
246
135
4
V
6
W
2
U
K1
V
1
246
W
1
U
1
V
1
246
WU V
K1
135
222
T1 T2 T3
T6
Diagrams per NEMA Symbology
SMC-50 solid-state
controller
SMC-50 controller
with internal bypass
SMC-50 solid-state
controller
SMC-50 controller
with internal bypass
Diagrams per IEC Symbology
SMC-50
controller
SMC-50
controller
SMC-50
controller
SMC-50
controller SMC-50
controller
SMC-50
controller
Line connection with
isolation contactor
(default mode)
Line connection with
isolation contactor
(default mode)
Inside-the-Delta connection
with isolation contactor
(optional mode)
Inside-the-Delta connection
with isolation contactor
(optional mode)
Delta connection with
shorted SCR protection
(optional mode)
Delta connection with
shorted SCR protection
(optional mode)
Motor Motor Motor
3~
Motor
3~
Motor
3~
Motor
(1) (1)
(2)
(1) (1)
(2)

Rockwell Automation Publication 150-QS003E-EN-P - April 2017 13
Installation Chapter 1
Control Wiring Standard Control Terminal Block
SMC-50 controllers come standard with two 24V DC digital on/off inputs
and two relay outputs for auxiliary control functions. The standard digital I/O
wiring terminal block is on the upper right portion of the SMC-50 controller.
The terminal block is removable.
Control Wiring Specifications
The following table provides the specifications for all SMC-50 controller
control wiring and option module terminal blocks. Each wiring terminal
accepts a maximum of two wires.
Table 7 - Control Wiring Specifications
Wire Size 0.2...2.5 mm2 (#24...14 AWG)
Maximum Torque 0.8 N•m (7 lb•in.)
Maximum Wire Strip Length 7 mm (0.27 in.)
Screw Type M3 Slotted
SHOCK HAZARD: To prevent the risk of electrical shock, disconnect all power
sources from the controller and option module before you install or service it.
Install the controller and option module in a suitable enclosure and keep it
free of contaminants.

14 Rockwell Automation Publication 150-QS003E-EN-P - April 2017
Chapter 1 Installation
Figure 5 - Standard Control Terminal Block Identification
(1) See the controller nameplate to verify the control power ratings (120/240V AC or 24V DC).
ATTENTION: IN1 DC (terminal 11) and IN2 DC (terminal 10) are 24V DC
inputs on controllers rated 120/240V AC and on controllers rated 24V DC.
Voltages that exceed the specified input range may cause damage to the
controller.
Terminal Number Description
1 (1) (2)
(1) RC snubbers are required when inductive loads are connected to terminal.
(2) See the controller nameplate to verify the control power ratings (120/240V AC or 24V DC)
Control Power +L1
2(1)(2) Control Power Common -L2
3 Ground — To connect to the system/control ground point.
4 (1)(3)
(3) When set to external bypass mode, the auxiliary contact is used to control a properly sized external contactor and overload once
the motor is at full speed.
Auxiliary Relay Contact #1—rated 3 A @ 120V AC, 1.5 A @ 240V AC
5 (1)(3) Auxiliary Relay Contact #1—rated 3 A @ 120V AC, 1.5 A @ 240V AC
6 (1)(3) Auxiliary Relay Contact #2—rated 3 A @ 120V AC, 1.5 A @ 240V AC
7 (1)(3) Auxiliary Relay Contact #2—rated 3 A @ 120V AC, 1.5 A @ 240V AC
8 DC Internal I/O Power, DC Common
9 Enable I/O
10 (1)(4)
(4) Do not connect any additional loads to this terminal. Parasitic loads may cause problems with operation.
Input #2 (24V DC) (range 15…30V DC)
11 (1)(4) Input #1 (24V DC) (range 15…30V DC)
12 +24V DC Internal I/O Power
-L2 +L1
12 11 10 9 8765
432 1
24V DC Inputs Relay Outputs Control Power
and Ground (1)
Internal +24V DC
In1 DC In2 DC
Enable I/O
Internal DC Common
Aux 2 Aux 1

Rockwell Automation Publication 150-QS003E-EN-P - April 2017 15
Installation Chapter 1
Typical Control Wiring Examples
Figure 6 and Figure 7 are control wiring diagram examples using the controller
standard I/O. For additional wiring examples, see the SMC-50 controller user
manual, publication 150-UM011.
Figure 6 - Two-wire Control (No DPI) with Fault Indication
(1) Customer supplied.
(2) See the controller nameplate to verify the control power input ratings (120V/240V AC or 24V DC).
(3) Terminal 10 (IN2) 24V DC normally open (N.O.) input is configured for Start/Stop or Start/Coast using
Parameter 57. When using the Start/Stop or Start/Coast, the N.O. contact must be used.
NOTE: The controller generates an I/O configuration fault if any input is configured for START or SLOW speed and no input is
configured for COAST or STOP.
(4) A customer-supplied jumper is required to enable the controller’s standard I/O operation.
(5) The terminal must be wired to the control ground to maintain reliable operation.
(6) The Aux2 output contact is configured for Fault using Parameter 176.
NOTE: Due to current leakage through an SCR in the OFF state (controller stopped), some form of upstream line power isolation is
recommended if maintenance is required on the motor. See the typical wiring diagram for Isolation Contactor Application in the
user manual.
TIP When you are using two-wire control with IN1 and/or IN2 set for either
Start/Stop or Start/Coast, you cannot start the SMC-50 controller via a HIM.
If you want to start and stop the motor in test mode via a HIM, use the
following steps:
•Set IN1 (Parameter 56) and IN2 (Parameter 57) to “Disable”.
•Clear the I/O Config Fault, if it appears.
•Set the Logic Mask (Parameter 148) to the appropriate bit, based on
which device port the HIM is using.
Motor should now start and coast via HIM commands.
-L2 +L1
-L2 +L1
-L2 +L1
12 11 10 9 8765
432 1
Intl +24V DC
In1 DC In2 DC
Enable I/O
Intl DC Common
Aux 2 Aux 1
Control
Ground
Control Power
Start/Stop
Indication LED
(3)
(1)
(4)
(1)
(6)
(5)
(2)

16 Rockwell Automation Publication 150-QS003E-EN-P - April 2017
Chapter 1 Installation
Figure 7 - Three-wire Control (with or without DPI) with Up-to-speed Indication and Isolation
Contactor
(1) Customer supplied.
(2) See the controller nameplate to verify the control power input ratings (120V/240V AC or 24V DC).
(3) Terminal 11 (IN1) 24V DC is configured for START input using Parameter 56.
(4) Terminal 10 (IN2) 24V DC is configured for Coast, Stop Option, etc. using Parameter 57.
NOTE: The controller generates an I/O configuration fault if any input is configured for START or SLOW speed and no input is
configured for COAST or STOP.
(5) A customer-supplied jumper is required to enable the controller’s standard I/O operation.
(6) The Aux2 output contact is configured for motor UTS using Parameter 176.
(7) The Aux1 output contact is configured for Normal (closed with Start command, Open with stop command) using Parameter 172.
(8) The terminal must be wired to the control ground to maintain reliable operation.
NOTE: Due to current leakage through an SCR in the OFF state (controller stopped), some form of upstream line power isolation is
recommended if maintenance is required on the motor. See the typical wiring diagrams for Isolation Contactor Application in
the user manual.
IC
-L2 +L1
-L2 +L1
-L2 +L1 +L1 -L2
12 11 10 9 8765
432 1
UTS
Intl +24V DC
In1 DC
In2 DC
Enable I/O
Intl DC Common
Aux 2 Aux 1
Control Ground
Control Power
(3)
(1)
(4)
(6)
(5)
(2)
(1)
(1) (1) (7)
(8)
Stop
Start
Up-to-speed
Indication
Isolation
Contactor

Rockwell Automation Publication 150-QS003E-EN-P - April 2017 17
Installation Chapter 1
Fan Wiring Fans for the SMC-50 controllers should be wired according to the instructions
in this section.
Integrated Bypass Units
For units with integrated bypass, you should wire the fans as shown in Figure 8.
Figure 8 - Fan Wiring—Integrated Bypass Units
Solid-state Units
Solid-state units do not require any additional wiring. The fans are connected
internally.
Upgraded Units
For SMC Flex controller-to-SMC-50 controller control upgrades, the fans
remain connected as they were in the SMC Flex controller. You do not need to
change any wiring.
Option Modules SMC-50 controllers have three expansion ports. These ports provide the
capability to add optional modules (additional inputs and outputs (I/O),
simple start/stop parameter configuration capability, ground fault, etc.).
•Note: the 20-COMM-X communication modules can only reside in Port 9.
1
4
3
2
~
1
4
3
2
~
—
+
120V AC (Factory Set) 240V AC (Optional)
24V DC
120V AC,
1-phase
240V AC,
1-phase
24V DC
Using 150-SCMD Module
(120…240V AC Control)
Using 150-SCMR Module
(24V DC Control)
Using 150-SCMD Module
(120…240V AC Control)
ATTENTION: There is the potential to have voltage values above 220V AC on the
option modules. Before removing the control module cover to access option
modules, disconnect ALL power to the SMC-50 controller. Do not remove or add
option modules while power is applied.

18 Rockwell Automation Publication 150-QS003E-EN-P - April 2017
Chapter 1 Installation
Figure 9 - Port Number Identification
Table 8 - Port Location for Compatible Option Modules
Port 7
Port 8
Port 9
HIM Bezel
HIM Port
SMC-50 control module
(shown without cover)
Port 4
Option Module
Cat. No. Module Name Description
Compatible Control Module Port Max. No of this
Type of Option
Module per
Control
Module
Port 7 Port 8 Port 9
150-SM2 PTC, Ground Fault(1) and Current
Transformer Interface
•Connectivity to motor PTC sensors
•Connectivity to external ground fault sensors(2)
•Connectivity to external current sensors(2) Yes Yes No 1
150-SM3 Analog I/O •2 analog inputs
•2 analog outputs Yes Yes Yes 3
150-SM4 Digital I/O •4 digital inputs
•3 relay outputs Yes Yes Yes 3
150-SM6 Parameter Configuration Module
•Three sets of 8-position DIP switches and five sets of
16-position rotary switches use for simple
programming.
Yes Yes Yes 1
20-COMM-X(3)(4) Communication Modules •Various communication modules are available No No Yes 1
20-HIM-A6 Enhanced, LCD display, full numeric keypad •Can be installed on control module in bezel/cradle (DPI
Port 1) or connected with cable to DPI Port 2. ——— 1
(5)
20-HIM-C6S Remote (panel mount), LCD display, full
numeric keypad
•Typically door- or panel mounted and connected with
cable to DPI Port 2. ——— 1
(5)
(1) The ground fault sensing feature of the SMC-50 controller is intended for monitoring purposes only.
(2) External components may be needed. See the SMC-50 controller user manual, publication 150-UM011, for additional information.
(3) See the SMC-50 Controller selection guide, publication 150-SG010, or SMC-50 controller user manual, publication 150-UM011, for a list of compatible 20-COMM-X communication modules.
(4) When installed in an SMC-50 controller, 20-COMM-X modules physically reside in the space assigned to Port 9, but connect to DPI Port 4 with a ribbon cable that is supplied with the communications
module.
(5) For most systems, a single HIM device is used. You can use multiple HIMs by using DPI Port 2 and a DPI Port-Splitter See the SMC-50 controller user manual, publication 150-UM011, for additional
information.
ATTENTION: The ground fault sensing feature of the SMC-50 controller is
intended for monitoring purposes only and not as a ground fault circuit
interrupter for personnel protection as defined in Article 100 of the NEC. The
ground fault sensing feature has not been evaluated for conformance to
UL 1053.