Baldor VS1STS Series Installation instructions

10/11 Installation & Operating Manual MN767S
VS1STS
AC Microdrive

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Important:
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download the latest version of this manual in Adobe Acrobat PDF format.

iMN767S
Chapter 1
Introduction
1.1 Getting Assistance from Baldor .................................................... 1-1
1.2 Safety Notices .................................................................. 1-1
1.3 Quick Start ..................................................................... 1-3
Chapter 2
General Information and Rating
2.1 Identify the Drive by Model Number ................................................. 2-1
2.2 Storage Guidelines............................................................... 2-1
2.3 VS1STS Ratings, Model Numbers and Frame Sizes ..................................... 2-2
Chapter 3
Installing the Drive
3.1 Receiving & Inspection ........................................................... 3-1
3.2 General Requirements for the Installation Site ......................................... 3-1
3.2.1 Operating Conditions ...................................................... 3-1
3.3 Mounting the Drive............................................................... 3-2
3.3.1 Enclosure Mounting ........................................................ 3-2
3.3.2 Mounting Clearances....................................................... 3-3
3.4 Drive Dimensions ................................................................ 3-4
Chapter 4
Power Wiring
4.1 Overview of Power Connections .................................................... 4-1
4.1.1 Safety Ground ............................................................ 4-1
4.1.2 Motor Ground ............................................................ 4-1
4.1.3 Shield Termination ......................................................... 4-1
4.1.4 RFI Filter Grounding........................................................ 4-1
4.2 Power Disconnect ............................................................... 4-1
4.3 Protective Devices ............................................................... 4-2
4.4 Electrical Installation ............................................................. 4-2
4.4.1 Branch Circuit Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.4.2 Single Phase Input Power Connections for 1 Phase Control ........................ 4-2
4.4.3 Three Phase Input Power Connections for 3 Phase Control ......................... 4-2
4.4.4 Optional Dynamic Brake Hardware Frame B Controls ............................. 4-3
4.4.5 Motor Connections ........................................................ 4-3
4.4.6 Long Motor Leads ......................................................... 4-3
4.4.7 M-Contactor Connections ................................................... 4-3
Chapter 5
Control Wiring
5.1 Control Wiring Overview .......................................................... 5-1
5.2 RJ11 Communication Connection................................................... 5-2
5.3 Analog and Digital Input Congurations .............................................. 5-3
5.3.1 Terminal Strip Mode........................................................ 5-3
5.3.2 Keypad Mode............................................................. 5-5
5.3.3 PI Control Mode........................................................... 5-6
5.3.4 User PI Control Mode ...................................................... 5-7
Table of Contents

ii MN767S
Chapter 6
Using the Keypad
6.1 Keypad Overview................................................................ 6-1
6.2 Changing Parameters ............................................................ 6-1
6.3 Reset Factory Default Settings ..................................................... 6-1
6.4 Advanced Keypad Operation Shortcuts .............................................. 6-2
6.5 Terminal Control ................................................................. 6-3
6.6 Keypad Control ................................................................. 6-3
6.7 Motor Auto Tuning ............................................................... 6-4
6.7.1 AutoTune after Factory Reset or from Factory Set Parameters....................... 6-4
6.7.2 User Selected Auto Tune .................................................... 6-4
6.8 Operating in Sensorless Vector Speed Control Mode .................................... 6-4
6.9 Sensorless Vector Torque Control Mode .............................................. 6-4
Chapter 7
Parameter Descriptions
7.1 Overview ...................................................................... 7-1
7.2 Basic Parameters - Parameter Group 1............................................... 7-1
7.3 Extended Parameters ............................................................ 7-3
7.3.1 Parameter Group 2 – Extended Parameters ..................................... 7-3
7.3.2 Parameter Group 3 – PID Control ............................................. 7-8
7.3.3 Parameter Group 4 – How Performance Motor Control ............................ 7-9
7.3.4 Parameter Group 0 – Monitoring Parameters (Read Only) .......................... 7-10
7.4 Advanced Parameters ............................................................ 7-11
7.4.1 Advanced Parameters - Parameter Group 5 ..................................... 7-11
7.4.2 Application Specic Parameters - Parameter Group 6 ............................. 7-13
7.4.3 Additional Parameter Group 0 – Monitoring Parameters............................ 7-16
Chapter 8
Customizing Your Application
8.1 Simple Parameter Adjustments ..................................................... 8-1
Chapter 9
Troubleshooting
9.1 Fault Codes .................................................................... 9-1
9.2 Periodic Inspection .............................................................. 9-1

iiiMN767S
Appendix A
Technical Specifications.............................................................. A-1
Appendix B
Parameter Tables ................................................................... B-1
Appendix C
CE Guidelines
C.1 CE Declaration of Conformity ...................................................... C-1
C.2 EMC - Conformity and CE - Marking ................................................ C-1
C.3 EMC Installation Options.......................................................... C-2
C.4 Grounding for Wall Mounting (Class A) also see Chapters 4 and 5 ......................... C-2
C.5 Grounding for Enclosure Mounting (Class B) also see Chapters 4 and 5 ..................... C-2
C.6 Using CE approved components will not guarantee a CE compliant system.................. C-2
C.7 EMC Wiring Technique ........................................................... C-3
C.8 EMC Installation Instructions ...................................................... C-4
Appendix D
Options & Kits
D.1 Accessories .................................................................... D-1
Appendix E
RS485/MODBUS Protocol
E.1 Introduction .................................................................... E-1
E.2 Installation ..................................................................... E-1
E.3 Operation ...................................................................... E-1
E.4 Performance Specications........................................................ E-1
E.5 Hardware Specications .......................................................... E-2
E.6 Communication Specications ..................................................... E-2
E.7 Communications Protocol (MODBUS-RTU) ........................................... E-2
E.8 Modbus Register Map ............................................................ E-3

iv MN767S

Introduction 1-1MN767S
Chapter 1
Introduction
This manual is intended for qualied electrical personnel familiar with installing, programming, and maintaining AC Drives.
This manual contains information on:
•Installing and wiring the VS1STS drive
•Programming the drive
•Troubleshooting the drive
1.1 Getting Assistance from Baldor
For technical assistance, contact your Baldor District Ofce. Before calling, please review the troubleshooting section of this
manual. You will be asked for the drive model number or catalog number that is located on the Nameplate along with the
drive serial number.
1.2 Safety Notices
This equipment contains voltages that may be as high as 1000 volts! Electrical shock can cause serious or fatal injury. Only
qualied personnel should attempt the start-up procedure or troubleshoot this equipment.
This equipment may be connected to other machines that have rotating parts or parts that are driven by this equipment.
Improper use can cause serious or fatal injury. Only qualied personnel should attempt the start-up procedure or
troubleshoot this equipment.
PRECAUTIONS: CLASSIFICATIONS OF CAUTIONARY STATEMENTS
WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in injury or death.
CAUTION: Indicates a potentially hazardous situation which, if not avoided, could result in damage to
property.
PRECAUTIONS
WARNING: Do not touch any circuit board, power device or electrical connection before you first ensure
that power has been disconnected and there is no high voltage present from this equipment or
other equipment to which it is connected. Electrical shock can cause serious or fatal injury. Only
qualified personnel should attempt the start-up procedure or troubleshoot this equipment.
WARNING: Be sure that you are completely familiar with the safe operation of this equipment.
This equipment may be connected to other machines that have rotating parts or parts that are
controlled by this equipment. Improper use can cause serious or fatal injury. Only qualified
personnel should attempt the start-up procedure or troubleshoot this equipment.
WARNING: Do not use motor overload relays with and automatic reset feature. These are dangerous since
the process may injure someone is a sudden or unexpected automatic restart occurs. If manual
reset relays are not available, disable the automatic restart feature using external control wiring.
WARNING: This unit has an automatic restart feature that will start the motor whenever input power is
applied and a RUN (FWD or REV) command is issued. If an automatic restart of the motor could
cause injury to personnel, the automatic restart feature of the VS1STS should be disabled.
WARNING: Be sure the system is properly grounded before applying power. Do not apply AC power before
you ensure that all grounding guidelines have been followed. Electrical shock can cause serious
or fatal injury.
WARNING: Do not remove cover for at least five (5) minutes after AC power is disconnected to allow
capacitors to discharge. Dangerous voltages are present inside the equipment. Electrical shock
can cause serious or fatal injury.
WARNING: Motor circuit may have high voltage present whenever AC power is applied, even when motor is
not rotating. Electrical shock can cause serious or fatal injury.
WARNING: Improper operation of control may cause violent motion of the motor shaft and driven equipment.
Be certain that unexpected motor shaft movement will not cause injury to personnel or damage to
equipment. Certain failure modes of the control can produce peak torque of several times the
rated motor torque.
WARNING: Dynamic brake resistors may generate enough heat to ignite combustible materials. Keep all
combustible materials and flammable vapors away from brake resistors.

1-2 Introduction MN767S
WARNING: The motor shaft will rotate during the auto tune procedure. Be certain that the unexpected motor
shaft movement will not cause injury to personnel or damage to equipment.
WARNING: MEDICAL DEVICE/PACEMAKER DANGER - Magnetic and electromagnetic fields in the vicinity
of current carrying conductors and industrial motors can result in a serious health hazard to
persons with cardiac pacemakers, internal cardiac defibrillators, neurostimulators, metal
implants, cochlear implants, hearing aids, and other medical devices. To avoid risk, stay away
from the area surrounding a motor and its current carrying conductors.
CAUTION: Disconnect motor leads (U, V and W) from control before you perform a “Dielectric Withstand”
test on the motor. Failure to disconnect motor from the control will result in extensive damage
to the control. The control is tested at the factory for high voltage / leakage resistance as part of
Underwriter Laboratory requirements.
CAUTION: Suitable for use on a circuit capable of delivering not more than the RMS symmetrical short circuit
amperes listed here at rated voltage.
Horsepower RMS Symmetrical Amperes
1 – 60 5,000
CAUTION: Do not connect AC power to the Motor terminals U, V and W. Connecting AC power to these
terminals may result in damage to the control.
CAUTION: Baldor recommends not using “Grounded Leg Delta” transformer power leads that may create
ground loops. Instead, we recommend using a four wire Wye.
CAUTION: If the DB hardware mounting is any position other than vertical, the DB hardware must be de-
rated by 35% of its rated capacity.
CAUTION: Only Baldor cables should be used to connect the keypad and control. These are special twisted
pair cables to protect the control and the keypad. Damage associated with other cable types are
not covered by the Baldor warranty.
CAUTION: If an M-Contractor is installed, the control must be disabled for at least 200msec before the
M-Contractor is opened. If the M-Contractor is opened while the control is supplying
voltage and current to the motor, the control may be damaged. Before the control is enabled, the
M-Contractor must be closed for at least 200msec.
CAUTION: Use of power correction capacitors on the output of the drive can result in erratic operation of
the motor, nuisance tripping, and/or permanent damage to the drive. Remove power
correction capacitors before proceeding. Failure to observe this precaution could result
in damage to, or destruction of, the equipment.
CAUTION: Integral solid state short circuit protection does not provide branch circuit protection. Branch
circuit protection must be provided in accordance with the National Electric Code and any
additional local codes.
CAUTION: If the DB hardware mounting is any position other than vertical, the DB hardware must be derated
by 35% of its rated capacity.
CAUTION: Only Baldor cables should be used to connect the keypad and control. These are special twisted
pair cables to protect the control and the keypad. Damage associated with other cable types are
not covered by the Baldor warranty.
CAUTION: If an M-Contactor is installed, the control must be disabled for at least 200msec before the
M-Contactor is opened. If the M-Contactor is opened while the control is supplying voltage and
current to the motor, the control may be damaged. Before the control is enabled, the M-Contactor
must be closed for at least 200msec.
CAUTION: Use of power correction capacitors on the output of the drive can result in erratic operation
of the motor, nuisance tripping, and/or permanent damage to the drive. Remove power
correction capacitors before proceeding. Failure to observe this precaution could result in
damage to, or destruction of, the equipment.
CAUTION: Integral solid state short circuit protection does not provide branch circuit protection. Branch
circuit protection must be provided in accordance with the National Electric Code and any
additional local codes.

Introduction 1-3MN767S
1.3 Quick Start
Figure 1-1 Power & Motor Terminal Locations
See Recommended Tightening
Torques in Table 4-1.
Frame B
(VS1STS51 shown
as an example)
U V W + BR
L1/L L2/N L3
Power Up Procedure (Refer to Chapter 3, 4 and 5 for additional details.)
1. Remove all power from the control.
2. Couple the motor to its load.
3. Verify freedom of motion of motor shaft.
4. Verify the motor coupling is tight without backlash.
5. Connect input control wires and output control wires, See Figure 1-2.
6. Connect a control switch between terminals 1 and 2 ensuring that the contact is open (drive disabled).
7. Connect Power & Motor wires to the control, See Figure 1-1.
8. Turn power on. Be sure there are no faults.
9. Set the following parameters for the values displayed on the motor nameplate:
P1-01 Motor Rated Voltage
P1-02 Motor Rated Current
P1-03 Motor Rated Frequency
P1-04 Motor Rated Speed
10. Set P1-07 Start/Stop Source to 1 or 2
11. Verify the holding brakes if any, are properly adjusted to fully release and set to the desired torque.
12. Enable the drive by closing the switch between control terminals 1 & 2.
13. Press the START key. If this is the rst enable from factory default parameters, the drive will carry out an Auto tune as
described in Section 6.7. On completion of the Auto tune, the display shows  ..
14. Select and program additional parameters to suit your application, see Chapter 7.
The control is now ready for use in the keypad mode. If a different operating mode is desired, refer to Chapter 7 Parameter
Descriptions.

1-4 Introduction MN767S
Figure 1-2 Input Connections
Frame B
123
4567
8910
11
Control Terminals
Tightening Torque =
4.4 lb-in (0.5 Nm)
Table 1-1 Control Terminal Descriptions
Terminal Signal Description
1 +24VDC @ 100mA
2 Digital Input 1 (8-30VDC)
3 Digital Input 2 (8-30VDC) / Digital Output 3 (24V, 10mA max.)
4 Digital Input 3 (8-30VDC) / Analog Input 2 (0-10VDC, 0-20mA or 4-20mA)
5 +24VDC @ 100mA Reference for Potentiometer (1kohm minimum)
6 Analog Input 1 (0-10VDC, 0-20mA or 4-20mA) / Digital Input 4 (8-30VDC)
7 Common (terminals 7 & 9 are connected)
8 Analog Output (0-10VDC @ 20mA max.) / Digital Output (0-24VDC @ 20mA max.)
9 Common (terminals 7 & 9 are connected)
10 Relay Common
11 Relay N.O. Contact (rated 250VAC@6A; 30VDC@5A)

General Information and Ratings 2-1MN767S
Chapter 2
General Information and Ratings
The VS1STS is an adjustable frequency PWM drive operating in V/Hz (volts per hertz) mode. This chapter contains
information about the VS1STS drive, including how to identify the drive.
2.1 Identify the Drive by Model Number
Each drive can be identied by its model number, as shown in Figure 2-1. The model number is one the shipping label and
the drive nameplate. The model number includes the drive and any options.
Figure 2-1 Drive Identification
VS1STS 5 5 - 0 T
VS1 Family STS Microdrive
Voltage Code
5 = 500 - 600Vac 3PH
Power Rating
Hp Rated kW Rated
1 = 1 0P8 = 0.75
2 = 2 1P5 = 1.5
3 = 3 2P2 = 2.2
5 = 5 4 = 4
7 = 7.5 5P5 = 5.5
Options
T = Internal Brake Transistor
0 = IP20
Enclosure
10 = 10 7.5 = 7.5
15 = 15 11 = 11
20 = 20 15 = 15
30 = 30 22 = 22
40 = 40 30 = 30
60 = 60 45 = 45
2.2 Storage Guidelines
Follow these recommendations to prolong drive life and performance if storing the drive:
1. Storage surrounding temperature is -40°C to 60°C.
2. Storage Humidity range 10% to 95% RH non-condensing.
3. Do not expose to corrosive atmosphere.

2-2 General Information and Ratings MN767S
2.3 VS1STS Ratings, Model Numbers and Frame Sizes
Table 2-1 Drive Ratings
HP Model Number HP kW Current (Amps)
Input Output
500-600V +/-10% 3-Phase Input
VS1STS51 1 0.75 2.2 1.7
VS1STS52 2 1.5 4.1 3.1
VS1STS53 3 2.2 5.4 4.1
VS1STS55 5 4 7.6 6.1
VS1STS57 7.5 5.5 11.7 9
VS1STS510 10 7.5 16.1 14
VS1STS515 15 11 17.3 18
VS1STS520 20 15 24.1 24
VS1STS530 30 22 46.6 39
VS1STS540 40 30 54.1 46
VS1STS560 60 45 69.6 62

Installing the Drive 3-1MN767S
Chapter 3
Installing the Drive
This chapter provides information that must be considered when planning a VS1STS drive installation and provides drive
mounting information and installation site requirements.
3.1 Receiving & Inspection
When you receive your control, there are several things you should do immediately.
1. Observe the condition of the shipping container and report any damage immediately to the commercial carrier that
delivered your control.
2. Remove the control from the shipping container and remove all packing materials from the control. The container and
packing materials may be retained for future shipment.
3. Verify that the part number of the control you received is the same as the part number listed on your purchase order.
4. Inspect the control for external physical damage that may have been sustained during shipment and report any damage
immediately to the commercial carrier that delivered your control.
5. If the control is to be stored for several weeks before use, make sure that it is stored in a location that conforms to
published storage humidity and temperature specications stated in this manual.
3.2 General Requirements for the Installation Site
It is important to ensure that the drive’s environment and operating conditions are satisfactory. The area behind the drive
must be kept clear of all control and power wiring. Power connections may create electromagnetic elds that may interfere
with control wiring or components when run in close proximity to the drive. Read the recommendations in the following
sections before continuing with the drive installation.
3.2.1 Operating Conditions
Before deciding on an installation site, consider the following guidelines:
•Operating surrounding temperature must be within 32°F (0°C) to 104°F (40°C).
If surrounding temperature exceeds 40°C, de-rate the output by 5% per °C above 40°C up to 55°C maximum surrounding
temperature.
•Protect the cooling fan by avoiding dust or metallic particles.
•Do not expose the drive to a corrosive atmosphere.
•Protect the drive from moisture and direct sunlight.
•Verify that the drive location will meet the environmental conditions.

3-2 Installing the Drive MN767S
3.3 Mounting the Drive
For applications that require a higher IP rating than the IP20 offered by the standard drive, mount in an enclosure following
the guidelines below.
•Mount the drive upright on a at, vertical, level surface.
•Use Figure 3-4 for mounting hole locations.
•Any enclosure should be made from a thermally conductive material.
•When vented enclosures are used, there should be venting above the drive and below the drive to ensure good air
circulation. Air should be drawn in below the drive and expelled above the drive.
•If the external environment contains contamination particles such as dust, a suitable particle lter should be tted to the
vents and forced ventilation implemented. The lter must be serviced / cleaned appropriately.
•High moisture, salt or chemical content environments should use a suitable sealed (non-ventilated) enclosure.
3.3.1 Enclosure Mounting
The enclosure design and layout should ensure that adequate ventilation paths and clearances are left to allow air to
circulate. The following recommended cabinet sizes are provided for mounting in non-ventilated metallic enclosures.
Figure 3-1 Enclosure Mounting
L
DW
G
G
Table 3-1 Non-Ventilated Enclosure Mounting
Drive Rating H W D G
inch mm inch mm inch mm inch mm
Frame B 2 Hp 15.8 400 11.8 300 11.8 300 2.4 60
Frame B 3 Hp 23.6 600 17.7 450 11.8 300 3.9 100

Installing the Drive 3-3MN767S
3.3.2 Mounting Clearances
For drives mounted in ventilated enclosures or force ventilated, the following cabinet sizes are recommended.
Table 3-2 Free-Ventilated Enclosure Mounting
Drive Rating L W D G
inch mm inch mm inch mm inch mm
Frame B 5 Hp 23.62 600 15.75 400 9.84 250 3.94 100
Frame C 20 Hp 31.50 800 23.62 600 11.81 300 5.91 150
Frame D 30 Hp 39.37 1000 23.62 600 11.81 300 7.87 200
Table 3-3 Force Ventilated Enclosure Mounting
Drive Rating L W D G
inch mm inch mm inch mm inch mm
Frame B 5 Hp 12.60 320 7.87 200 7.87 200 2.95 75
Frame C 20 Hp 15.75 400 9.84 250 7.87 200 3.94 100
Frame D 30 - 60 Hp 31.50 800 19.69 500 9.84 250 5.12 130

3-4 Installing the Drive MN767S
3.4 Drive Dimensions
Figure 3-2 IP20 Mounting Hole Locations
A
H
W
B
C
Table 3-4 IP20 Dimensions
Frame Height Width Depth A B C Weight
in mm in mm in mm in mm in mm in mm lb kg
B 10.24 260 3.94 100 6.89 175 8.27 210 3.62 92 0.98 25 5.73 2.6
C 10.24 260 6.73 171 6.89 175 8.27 210 6.42 163 0.98 25 7.28 5.3
D 20.47 520 13.39 340 8.66 220 16.54 420 12.6 320 1.97 50 61.73 28
Control Terminal Torque Settings of 4.5 lb-in (0.5 Nm)
Power Terminal Torque Settings of 9 lb-in (1 Nm)

Power Wiring 4-1MN767S
Chapter 4
Power Wiring
4.1 Overview of Power Connections
The recommended grounding method is shown in Figure 4-1.
4.1.1 Safety Ground - (G)
This is the safety ground for the drive that is required by code. One of these points must be connected to adjacent building
steel (girder, joist), a oor ground rod, or bus bar. Grounding points must comply with national and local industrial safety
regulations and/or electrical codes.
Figure 4-1 Recommended System Grounding
L1
AC Main
Supply
Safety
Ground
Driven Earth
Ground Rod
(Plant Ground)
Four Wire
Wye
L1
L2
L3
Earth
L2L3 U V W
Optional
Line
Reactor
Optional
Load
Reactor
Route all 4 wires L1, L2, L3 and Earth (Ground)
together in conduit or cable.
Route all 4 wires U, V, W and Motor Ground together
in conduit or cable.
Connect all wires (including motor ground)
inside the motor terminal box.
Ground per NEC and
Local codes.
Note: Wiring shown for clarity of grounding
Method only. Not representative of
actual terminal block location.
Note: A load reactor is recommended
and must be purchased separately..
Note: A line reactor is recommended
and must be purchased separately..
Drive
See recommended tightening torques in Table 4-1.
Use UL Listed Fork terminals for ground connections.
4.1.2 Motor Ground
The motor ground must be connected to one of the ground terminals on the drive. Use UL Listed Fork terminals for ground
connections.
4.1.3 Shield Termination
Either of the safety ground terminals located on the power terminal block provides a grounding point for the motor cable
shield. The motor cable shield connected to one of these terminals (drive end) should also be connected to the motor frame
(motor end). Use a shield terminating or EMI clamp to connect the shield to the safety ground terminal. When shielded cable
is used for control and signal wiring, the shield should be grounded at the drive end only, never at both ends.
4.1.4 RFI Filter Grounding
Using single-phase drives with integral lter, or an external lter with any drive rating, may result in relatively high ground
leakage currents. Therefore, the lter must only be used in installations with grounded AC supply systems and be
permanently installed and solidly grounded (bonded) to the building power distribution ground.
Ensure that the incoming supply neutral is solidly connected (bonded) to the same building power distribution ground.
Grounding must not rely on exible cables and should not include any form of plug or socket that would permit inadvertent
disconnection. Some local codes may require redundant ground connections. The integrity of all connections should be
checked periodically.
4.2 Power Disconnect
A power disconnect should be installed between the input power service and the drive for a fail safe method to disconnect
power. The drive will remain in a powered-up condition until all input power is removed from the drive and the internal bus
voltage is depleted.

4-2 Power Wiring MN767S
4.3 Protective Devices
Recommended fuse sizes are based on the following:
115% of maximum continuous current for time delay.
150% of maximum continuous current for Fast or Very Fast action.
Note: These recommendations do not consider harmonic currents or surrounding temperatures greater than 45°C. Be sure
a suitable input power protection device is installed. Use the recommended fuses and wire sizes shown in Table 4-1
is based on the use of copper conductor wire rated at 75°C. The table is specied for NEMA B motors.
Fast Action Fuses: 240VAC, Buss® KTN; 460VAC, Buss® KTS
Very Fast Action: 240VAC, Buss® JJN; 460VAC, Buss® JJS
Semiconductor: 240VAC, Ferraz Shawmut A50QS
Buss® is a trademark of Cooper Industries, Inc.
4.4 Electrical Installation
All interconnection wires between the drive, AC power source, motor, host control and any operator interface stations should
be in metal conduits or shielded cable must be used. Use UL Listed Fork connectors that are of appropriate size for wire
gauge being used. Connectors are to be installed using crimp tool specied by the manufacturer of the connector. Only
Class 1 wiring should be used.
4.4.1 Branch Circuit Protection
These devices require branch circuit protection. Branch circuit protection shall be provided. The size of the Branch Circuit
Protection Fuse shall be as shown in the ratings table or equivalent.
4.4.2 Single Phase Input Power Connections for 1 Phase Control
All cables must be shielded and the shields must be grounded at the enclosure cable entrance.
1. Connect the single phase input power wires to an appropriate interrupter and protection.
2. Connect the single phase AC input power leads to terminals L1/L and L2/N of the control (see Figure 4-2 for location).
3. Connect the power ground wire to the ground terminal. (See Figure 4-2.)
4.4.3 Three Phase Input Power Connections for 3 Phase Control
All cables must be shielded and the shields must be grounded at the enclosure cable entrance.
1. Connect the three phase input power wires to an appropriate interrupter and protection.
2. Connect the three phase AC input power leads to terminals L1/L. L2/N and L3 of the control (see Figure 4-2 for location).
3. Connect the power ground wire to the ground terminal (see Figure 4-2).
Figure 4-2 Wiring Locations
+
BR
U V W
Frame B
Frame B
(VS1STS51 shown
as an example)
See Recommended Tightening
Torques in Table 4-1.
L1/L L2/N L3

Power Wiring 4-3MN767S
4.4.4 Optional Dynamic Brake Hardware Frame B Controls
If optional DB resistor is to be used, connect it to the + and BR terminals, see (see Figure 4-2). Dynamic Brake (DB)
Hardware must be installed on a at, non-ammable, vertical surface for effective cooling and operation. The DB Resistors
get extremely hot during normal operation and must be mounted away from ammable surfaces and unsafe atmosphere.
4.4.5 Motor Connections
All cables must be shielded and the shields must be grounded at the enclosure cable entrance.
1. Connect the Motor leads to terminals U, V and W (see Figure 4-2 for location).
2. Connect the motor ground wire to the ground terminal (See Figure 4-2).
4.4.6 Long Motor Leads
The wire leads that connect the motor to the control are critical in terms of sizing, shielding and the cable characteristics.
Short cable runs are usually trouble free but fault-monitoring circuitry can produce numerous faults when long cables are
used. Refer to Table 4-1 for maximum cable lengths. Baldor recommends adding an optional load reactor to the output of
the control. The load reactor and/or common mode choke should be placed in close physical proximity to the control.
Unexpected faults may occur due to excessive charging current required for motor cable capacitance. If you use long
motor leads and experience unexpected trips due to current overload conditions and are not sure how to correctly size and
connect the optional load reactors, please contact your Baldor District representative. Baldor is always glad to assist.
Table 4-1 Fuse & Wire size / Terminal Torque Specifications
Hp kW
Nominal
Input
Current
Fuse or
MCB
Supply Cable
Size
Nominal
Output
Current
Motor Cable
Size
Max Motor Cable
Length
Min
Brake
Resistor
Value
amps amps AWG mm2 amps AWG mm2 feet meters ohms
500-600V +/-10% 3-Phase Input
1 0.75 2.2 3 16 1 1.7 16 1 164 50 47
2 1.5 4.1 6 16 1 3.1 16 1 328 100 47
3 2.2 5.4 6 16 1 4.1 16 1 328 100 47
5 4 7.6 10 14 1.5 6.1 14 1.5 328 100 47
7.5 5.5 11.7 16 12 2.5 9 12 2.5 328 100 47
10 7.5 16.1 20 12 2.5 14 12 2.5 328 100 22
15 11 17.3 20 10 4 18 12 2.5 328 100 22
20 15 24.1 25 10 4 24 10 4 328 100 22
30 22 46.6 63 6 10 39 6 10 328 100 12
40 30 54.1 63 4 16 46 6 10 328 100 12
60 45 69.6 80 3 25 62 4 16 328 100 12
Control Terminal Torque Settings of 4.5 lb-in (0.5 Nm)
Power Terminal Torque Settings of 9 lb-in (1 Nm)
For UL compliance Motor Cable to be Copper 75°C and Fuse current rating dened by ratings marked ( )*.
Wire size is based on 40°C surrounding temperature and fuses are based on 45°C surrounding temperature, max continuous
output and no harmonic current.
4.4.7 M-Contactor Connections
If required by local codes or for safety reasons, an M-Contactor (motor circuit contactor) may be installed. However,
incorrect installation or failure of the M-contactor or wiring may damage the control. If an M-Contactor is installed,
the control must be disabled for at least 200msec before the M-Contactor is opened or the control may be damaged.
M-Contactor connections are shown in Figure 4-3.
CAUTION: If an M-Contactor is installed, the control must be disabled for at least 200msec before the M-Contactor
is opened. If the M-Contactor is opened while the control is supplying voltage and current to the motor,
the control may be damaged. Before the control is enabled, the M-Contactor must be closed for at least
200msec.

4-4 Power Wiring MN767S
Figure 4-3 Motor Connections and Optional Connections
*Optional components not provided with control.
Baldor
Control
*AC Motor
Note 1
*Optional
Load
Reactor
Note 1
A1 B1 C1
A2 B2 C2
U V W
U
V W
G
Note 3
* Optional
RC Device
Electrocube
RG1781-3
* M Enable
*M-Contactor
To Power Source
(Rated Coil Voltage)
M=Contacts of optional M-Contactor
GND
*Optional M Contactor Connections
Note 2
See Recommended Tightening
Torques in Table 4-1.
M
M
Notes: 1. Metal conduit should be used. Connect conduits
so the use of Load Reactor or RC Device does not
interrupt EMI/RFI shielding.
2. See Line/Load Reactors described previously in
this section.
3. Use same gauge wire for ground as for U, V and W.