Information furnished by Control Techniques Drives Inc. (Control Techniques) is believed to be
accurate and reliable. However, no responsibility is assumed by Control Techniques for its use.
Control Techniques reserves the right to change the design or operation of the equipment described
herein and any associated motion products without notice. Control Techniques also assumes no
responsibility for any errors that may appear in this document. Information in this document is subject
to change without notice.
Information in this document is subject to change without notice. No part of this document may be
reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose,
without the express written permission of
Control Techniques.
The following are trademarks of
written approval of
Control Techniques: EMERSON Motion Control, EMERSON Motion Control
Control Techniques and may not be reproduced in any fashion without
Power Tools, AXIMA, “Motion Made Easy.”
Control Techniques is a divison of EMERSON Co.
Control Techniques, Inc. is not affliated with Microsoft Corporation, over of hte Microsoft, Windows,
and Windows NT trademarks.
IBM is a registered trademark of International Business Machines Corportation.
Modbus is a registered trademark of Gould, Inc.
Data Highway Plus is a trademark of Allen-Bradley
Schaffner is a trademark of Schaffner.
DeviceNet is a trademark of Open DeviceNet Vendor Association.
This document has been prepared to conform to the current released version of theproduct. Because of our
extensive development efforts and our desire to further improve and enhance the product, inconsistencies may
exist between the product and documentation in some instances. Call your customer support representative if you
encounter an inconsistency.
ii
Customer Service
Control Techniques
12005 Technology Drive
Eden Prairie, Minnesota 55344-3620
U.S.A.
Telephone: (952) 995-8000 or (800) 397-3786
It is Control Techniques’ goal to ensure your greatest possible satisfaction with the operation
of our products. We are dedicated to providing fast, friendly, and accurate assistance. That is
why we offer you so many ways to get the support you need. Whether it’s by phone, fax or
modem, you can access Control Techniques support information 24 hours a day, seven days
a week. Our wide range of services include:
FAX (952) 995-8011
You can FAX questions and comments to Control Techniques. Just send a FAX to the number
listed above.
Website and Emailwww.emersonct.com
Website: www.emersonct.com
Email: info@emersonct.com
If you have Internet capabilities, you also have access to technical support using our website.
The website includes technical notes, frequently asked questions, release notes and other
technical documentation. This direct technical support connection lets you request assistance
and exchange software files electronically.
Technical Support(952) 995-8033 or (800) 397-3786
Email: service@emersonct.com
Control Techniques’ “Motion Made Easy” products are backed by a team of professionals
who will service your installation wherever it may be. Our technical service center in Eden
Prairie, Minnesota is ready to help you solve those occasional problems over the telephone.
Our technical service center is available 24 hours a day for emergency service to help speed
any problem solving. Also, all hardware replacement parts, should they ever be needed, are
available through our service organization.
When you call, please be at your computer, have your documentation in hand, and be
prepared to provide the following information:
•Product version number, found by choosing About from the Help menu.
•The type of controller or product you are using.
iii
•Exact wording of any messages that appear on your screen.
•What you were doing when the problem occurred.
•How you tried to solve the problem.
Need on-site help? Control Techniques provides service, in most cases, the next day. Just call
Control Techniques’ technical service center when on-site service or maintenance is required.
Training Services(952) 995-8000 or (800) 397-3786
Email: training@emersonct.com
Control Techniques maintains a highly trained staff of instructors to familiarize customers
with Control Techniques’ “Motion Made Easy” products and their applications. A number of
courses are offered, many of which can be taught in your plant upon request.
Application Engineering(952) 995-8000 or (800) 397-3786
Email: applengr@emersonct.com
An experienced staff of factory application engineers provides complete customer support for
tough or complex applications. Our engineers offer you a broad base of experience and
knowledge of electronic motion control applications.
Customer Service (Sales)(952) 995-8000 or (800) 397-3786
Email: sales@emersonct.com
Authorized Control Techniques distributors may place orders directly with our Customer
Service department. Contact the customer Service department at this number for the
distributor nearest you.
Document Conventions
Manual conventions have been established to help you learn to use this manual quickly and
easily. As much as possible, these conventions correspond to those found in other
Microsoft
Menu names and options are printed in bold type: the File menu.
Dialog box names begin with uppercase letters: the Axis Limits dialog box.
Dialog box field names are in quotes: “Field Name.”
Button names are in italic: OK button.
Source code is printed in Courier font: Case ERMS.
iv
Ò WindowsÒ documentation.
In addition, you will find the following typographic conventions throughout this manual.
ThisRepresents
bold
italic
ALL CAPITALSDirectory names, file names, key names, and acronyms.
SMALL CAPSNon-printable ASCII control characters.
KEY1+KEY2
example: (Alt+F)
KEY1,KEY2
example: (Alt,F)
Characters that you must type exactly as they appear. For example, if
you are directed to type a:setup, you should type all the bold characters
exactly as they are printed.
Place holders for information you must provide. For example, if you are
directed to type filename, you should type the actual name for a file
instead of the word shown in italic type.
A plus sign (+) between key names means to press and hold down the
first key while you press the second key.
A comma (,) between key names means to press and release the keys one
after the other.
Note
For the purpose of this manual and product, “Note” indicates essential information about
the product or the respective part of the manual.
Epsilon Only
For the purpose of this manual and product, the “Epsilon” symbol indicates information
about the Epsilon drive specifically.
Throughout this manual, the word “drive” refers to an Epsilon or E Series drive.
“Warning” indicates a potentially hazardous situation that, if not avoided, could result in
death or serious injury.
“Caution” indicates a potentially hazardous situation that, if not avoided, may result in
minor or moderate injury.
“Caution” used without the safety alert symbol indicates a potentially hazardous situation
that, if not avoided, may result in property damage.
v
Safety Instructions
General Warning
Failure to follow safe installation guidelines can cause death or serious injury. The voltages
used in the product can cause severe electric shock and/or burns and could be lethal. Extreme
care is necessary at all times when working with or adjacent to the product. The installation
must comply with all relevant safety legislation in the country of use.
Qualified Person
For the purpose of this manual and product, a “qualified person” is one who is familiar with
the installation, construction and operation of the equipment and the hazards involved. In
addition, this individual has the following qualifications:
•Is trained and authorized to energize, de-energize, clear and ground and tag circuits and
equipment in accordance with established safety practices.
•Is trained in the proper care and use of protective equipment in accordance with
established safety practices.
•Is trained in rendering first aid.
Reference Materials
The following related reference and installation manuals may be useful with your particuliar
system.
•Epsilon Eb and E Series En Drives Reference Manual (P/N 400501-01)
•PowerTools Software User’s Guide (P/N 400503-01)
•Epsilon and E Series Drive Parameters Reference Manual (P/N 400504-01)
vi
Epsilon Eb Digital Servo Drive Installation
Safety Considerations
Safety Precautions
This product is intended for professional incorporation into a complete system. If you install
the product incorrectly, it may present a safety hazard. The product and system may use high
voltages and currents, carry a high level of stored electrical energy, or are used to control
mechanical equipment that can cause injury.
You should give close attention to the electrical installation and system design to avoid
hazards either in normal operation or in the event of equipment malfunction. System design,
installation, commissioning and maintenance must be carried out by personnel who have the
necessary training and experience. Read and follow this safety information and instruction
manual carefully.
Enclosure
This product is intended to be mounted in an enclosure that prevents access except by trained
and authorized personnel and prevents the ingress of contamination. This product is designed
for use in an environment classified as pollution degree 2 in accordance with IEC664-1. This
means that only dry, non-conducting contamination is acceptable.
Setup, Commissioning and Maintenance
Manual
It is essential that you give careful consideration to changes to drive settings. Depending on
the application, a change could have an impact on safety. You must take appropriate
precautions against inadvertent changes or tampering. Restoring default parameters in certain
applications may cause unpredictable or hazardous operation.
Safety of Machinery
Within the European Union all machinery in which this product is used must comply with
Directive 89/392/EEC, Safety of Machinery.
The product has been designed and tested to a high standard, and failures are very unlikely.
However the level of integrity offered by the product’s control function – for example stop/
start, forward/reverse and maximum speed – is not sufficient for use in safety-critical
applications without additional independent channels of protection. All applications where
malfunction could cause injury or loss of life must be subject to a risk assessment, and further
protection must be provided where needed.
General warning
Failure to follow safe installation guidelines can cause death or serious injury. The voltages used in
this unit can cause severe electric shock and/or burns, and could be lethal. Extreme care is necessary
vii
Epsilon Eb Digital Servo Drive Installation Manual
at all times when working with or adjacent to this equipment. The installation must comply with all
relevant safety legislation in the country of use.
AC supply isolation device
The AC supply must be removed from the drive using an approved isolation device or disconnect
before any servicing work is performed, other than adjustments to the settings or parameters
specified in the manual. The drive contains capacitors which remain charged to a potentially lethal
voltage after the supply has been removed. Allow at least 6 minutes for the Epsilon 205, 3 minutes
for Epsilon 202/203 and 30 seconds for E Series drives after removing the supply before carrying
out any work which may involve contact with electrical connections to the drive.
Products connected by plug and socket
A special hazard may exist where the drive is incorporated into a product which is connected to the
AC supply by a plug and socket. When unplugged, the pins of the plug may be connected to the
drive input, which is only separated from the charge stored in the bus capacitor by semiconductor
devices. To avoid any possibility of electric shock from the pins, if they are accessible, a means
must be provided for automatically disconnecting the plug from the drive (e.g., a latching
contactor).
Grounding (Earthing, equipotential bonding)
The drive must be grounded by a conductor sufficient to carry all possible fault current in the event
of a fault. The ground connections shown in the manual must be followed.
Fuses
Fuses or over-current protection must be provided at the input in accordance with the instructions
in the manual.
Isolation of control circuits
The installer must ensure that the external control circuits are isolated from human contact by at
least one layer of insulation rated for use at the applied AC supply voltage.
viii
Underwriters Laboratories Listed
LISTED 51Y8
IND. CONT. EQ.
The Epsilon Digital Servo Drives are marked with the “UL Listed” label after passing a
rigorous set of design and testing criteria developed by UL (UL508C). This label indicates
that UL certifies this product to be safe when installed according to the installation guidelines
and used within the product specifications.
The “conditions of acceptability” required by UL are:
•The Epsilon drive surrounding air ambient temperature must be 40° C (104° F) or less.
•Epsilon drive surrounding air ambient temperature can be up to 50°C (122° F) with 3%
linear derating for every degree above 40° C (104° F).
•This product is suitable for use on a circuit of delivering not more than 5000 RMS
symmetrical amperes, 240 volts maximum.
•Motors must incorporate an overload protection device such as an overtemperature
switch.
Drive Overload Protection
The drive output current overload protection is provided by the drive and is not adjustable.
This overload protection is based on maximum continuous output current capacity. It will
allow up to 200 percent of the drive rated current to be delivered for the amount of time
determined by the following chart.
Rated output current (Amps RMS)
Drive ModelContinuousPeak
Eb-2021.83.6
Eb-20336
Eb-2055.010.0
ix
Drive Output Current vs. Time gra ph
60
50
40
30
20
Time (seconds)
10
0
100125150175200
% Dri ve Rate d C ur re nt
CE Declaration of Conformity
The Epsilon Digital Servo Drives are marked with the “Conformite Europeenne Mark” (CE
mark) after passing a rigorous set of design and testing criteria. This label indicates that this
product meets safety and noise immunity and emissions (EMC) standards when installed
according to the installation guidelines and used within the product specifications.
x
Declaration of Conformity
Manufacturer’s Name:
Manufacturer’s Address:
Products Description:
Model Number:
System Options:
Conforms to the following product specification:
EN 55011/1991 Class A Group 1, CISPR 11/1990 Class A Group 1
EN 61800-3, 1996:
Control Techniques
12005 Technology Drive
Eden Prairie, MN 55344
USA
Declares that the following products:
Epsilon Digital Servo Drive
Eb-202, Ei-202, Eb-203, Ei-203, Eb-205 and Ei-205
This declaration covers the above products with the ECI-44 Screw
Terminal Interface.
Electomagnetic Compatibility (EMC):
IEC 1000-4-2/1995; EN 61000-4-2, 6kV CD
IEC 1000-4-3/1995; EN 61000-4-3, ENV 50140/1993, 80% AM,
10V/m @ 3 m
IEC 1000-4-4/1995; EN 61000-4-4, 2 kV ALL LINES
EN 61000-4-5, 1kV L-L, 2kV L-G
EN 61000-4-11, 300 ms/1000 ms 100% DIP
ENV 50204/1995, Pulse, 900 MHz, 50% DTY, 200 Hz
Supplementary information:
The products herewith comply with the requirements of the Low Voltage Directive (LVD) 73/23/EEC and EMC
This electronic drive product is intended to be used with an appropriate motor, electrical protection components and
other equipment to form a complete end product or system. It must only be installed by a professional assembler
who is familiar with requirements for safety and electromagnetic compatibility (“EMC”). The assembler is
responsible for ensuring that the end product or system complies with all the relevant laws in the country where it is
to be used. Refer to the product manual for installation guidelines.
Directive 89/336/EEC
Bradley Schwartz/ VP EngineeringDate
Sobetra Automation
European Contact:
Langeveldpark Lot 10
P. Dasterleusstraat 2
1600 St. Pieters Leeuw, Belgium
Epsilon Eb Digital Servo Drive Installation Manual
xvi
Epsilon Eb Digital Servo Drive Installation
Epsilon Eb Digital Servo Drive
The Epsilon drives are standalone, fully digital brushless servo drives designed and built to
reliably provide high performance and flexibility without sacrificing ease of use.
The use of State-Space algorithms make tuning very simple and forgiving. The drives are
designed to operate with up to a 10:1 inertia mismatch right out of the box. Higher (50:1 and
more) inertial mismatches are possible with two simple parameter settings.
The drives can be quickly configured to many applications in less than 5 minutes with
PowerTools software on a PC running Windows 95, 98, or NT 4.0.
Complete diagnostics are provided for quick troubleshooting. A diagnostic display on the
front of the drive informs the user of the operational or fault status. The last 10 faults are
stored in non-volatile memory along with a time stamp for easy recall.
Epsilon drives operate at 42 to 264 VAC standalone or at 24 to 375 VDC with an A.P.S.
(Alternate Power Supply) and are available in two power ratings. The drive will fit in a 6 inch
deep enclosure with cables connected.
Drive ModelPower RatingContinuous CurrentPeak Current
Epsilon Eb-202650 W1.8 amps 3.6 amps
Epsilon Eb-2031100 W3.0 amps6.0 amps
Epsilon Eb-2051750 W5.0 amps10.0 amps
Manual
Introduction
The MG and NT motors that are matched to the Epsilon drives provide low inertia, high
power to size ratios, and encoder feedback for accurate positioning.
Features
•Digital drive design using DSP, ASIC, and surface mount technologies
•Epsilon input power is rated at 42 to 264 VAC (12 to 264 VAC or 12 to 375 VDC when
using an A.P.S.)
•Small mounting footprint
•Auxiliary logic power supply capability
•Five optically isolated inputs and three optically isolated outputs
•Built-in RS-232C to RS-485 converter for multi-drop applications
•RS-232C/485 serial communications interface using industry standard Modbus®
protocol up to 19.2 kbaud
•Diagnostic and operating mode status display
1
Epsilon Eb Digital Servo Drive Installation Manual
•Extensive fault sensing and diagnostics, including storage and time stamping of the last
ten faults
•Maximum input response time is 500 µs for command and input functions
•Peak torque up to three times continuous motor torque rating 200% for 5 seconds
•Sinusoidal commutation for efficiency and motor smooth motion
•No potentiometers or selector switches
•No tuning needed for no-load up to 10:1 inertia mismatch
•High performance tuning based on inertia ratio, friction and response with PowerTools
software (available separately)
•High resolution encoder
•Four velocity presets
•Programmable pulse follower ratio
•Pulse mode input type selectable between differential and single-ended
•Removable connectors for easy installation
•Single cable connection to Control Techniques’ AXIMA 2000 and 4000 multi-axis
controllers
•Scalable Encoder Output in one line per revolution increments
•Travel Limit Function in Torque mode
•Access to bus voltage for external shunt
•Able to operate non-Control Techniques motors with encoders
Figure 1:Epsilon Eb Drives Feature Location
2
Epsilon Eb Digital Servo Drive Installation
Basic Installation Notes
You are required to follow all safety precautions during startup such as providing proper
equipment grounding, correctly fused power, and an effective Emergency Stop circuit which
can immediately remove power in the case of a malfunction. See the “Safety Considerations”
section for more information.
Electromagnetic Compatibility (EMC)
Drives are designed to meet the requirements of EMC. Under extreme conditions a drive
might cause or suffer from disturbances due to electromagnetic interaction with other
equipment. It is the responsibility of the installer to ensure that the equipment or system into
which the drive is incorporated complies with the relevant EMC legislation in the country of
use.
The following instructions provide you with installation guidance designed to help you meet
the requirements of the EMC Directive 89/336/EEC.
Adhering to the following guidelines will greatly improve the electromagnetic compatibility
of your system; however, final responsibility for EMC compliance rests with the machine
builder, and Control Techniques cannot guarantee your system will meet tested emission or
immunity requirements.
Manual
Installation
If you need to meet EMC compliance requirements, EMI/RFI line filters must be used to
control conducted and radiated emissions as well as improve conducted immunity.
Physical location of these filters is very important in achieving these benefits. The filter
output wires should be kept as short as possible (12 inches is suggested) and routed away from
the filter input wires. In addition:
•Choose an enclosure made of a conductive material such as steel, aluminum, or stainless
steel.
•Devices mounted to the enclosure mounting plate, which depend on their mounting
surfaces for grounding, must have the paint removed from their mounting surfaces and the
mating area on the mounting plate to ensure a good ground. See “Achieving Low
Impedance Connections” on page 4 for more information.
•If grounding is required for cable grommets, connectors, and/or conduit fittings at
locations where cables are mounted through the enclosure wall, paint must be removed
from the enclosure surface at the contact points.
•AC line filter input and output wires and cables should be shielded, and all shields must
be grounded to the enclosure.
3
Epsilon Eb Digital Servo Drive Installation Manual
Achieving Low Impedance Connections
Noise immunity can be improved and emissions reduced by making sure that all the
components have a low impedance connection to the same ground point. A low impedance
connection is one that conducts high frequency current with very little resistance. Impedance
cannot be accurately measured with a standard ohmmeter, because an ohmmeter measures
DC resistance. For example, a 12-inch-long, 8-gauge,round wire has a significatly higher
impedance than a 12-inch-long, 12-gauge, flat braided conductor. A short wire has less
impedance than a larger one.
Low impedance connections can be achieved by bringing large areas of conductive surfaces
into direct contact with each other. In most cases this requires paint removal because a ground
connection through bolt threads is not sufficient. However, component materials should be
conductive, compatible, and exhibit good atmospheric corrosion resistance to prevent loss
through corrosion, which will hinder the low impedance connection. Enclosure
manufacturers offer corrosion resistant, unpainted mounting plates to help.
Bringing components into direct contact cannot always be achieved. In these situations a
conductor must be relied upon to provide a low impedance path between components.
Remember a flat braided wire has lower impedance than a round wire of a large guage rating.
A low impedance connection should exist among the following components:
•Enclosure and mounting plate
•Servo amplifier chassis and mounting plate
•EMI/RFI AC line filter chassis and mounting plate
•Other interface equipment chassis and mounting plate
•Other interface equipment chassis and electrical connectors
•Enclosure and conduit fittings or electrical connectors
•Enclosure mounting plate and earth ground
•Motor frame and conduit fittings or electrical connectors
•Encoder chassis and electrical connector
A good rule to follow when specifying conductors for high frequency applications is to use a
metal strap with a length to width ratio that is less than 3:1.
4
Installation
AC Line Filters
The AC line filters used during Control Techniques’ compliance testing are listed below.
These filters are capable of supplying the drive input power to the specified drive under
maximum output power conditions.
EpsilonE SeriesSchaffner Part #Control Techniques Part #Rating
Eb-202, Eb-203
Eb-205EN-208FS5278-16/08960305-01
EN-204FS5278-16/08960305-01
EN-214FN-258/16960304-0116A, 480V, 3 Ø
FN2070-10/08960307-0110A, 240V, 1 Ø
16A, 240V, 1 Ø
Alternately, Control Techniques has also seen good results with the following line filters:
DrivePart #Rating
EN-204
Corcom 20EQ120A, 240V, 1 ØEN-208
Eb-202, Eb-203, Eb-205
Eb-202Schaffner FN 2070-6-066A, 240V, 1 Ø
AC Line Filter Installation Notes
•EMC criteria can be met in installations where multiple drives are supplied through a
single filter, however, it is the installers responsibility to verify EMC compliance.
Questions on this subject should be directed to the filter manufacturer.
•It is critical that you keep the filter inputs routed away from any electrical noise sources
to prevent noise from being induced into them and carried out of the enclosure.
5
Epsilon Eb Digital Servo Drive Installation Manual
Cable to Enclosure Shielding
Shielded motor, feedback, serial communications, and external encoder cables were used for
Control Technicques’ compliance testing and are necessary to meet the EMC requirements.
Each cable shield was grounded at the enclosure wall by the type of grommet described earlier
and shown in the figure below.
Figure 2:Through Wall Shield Grommet
Cable Type
Motor Cable, 16 GaCMDSCGS-0501/2" pipe7/8"
Motor Cable, 12 GaCMMSCGS-0501/2" pipe7/8"
Feedback CableCFOSCGS-0501/2" pipe7/8"
Flex Motor Cable, 16 GaCMDFCGS-0501/2" pipe7/8"
Flex Motor Cable, 12 GaCMMFCGS-0753/4" pipe1 1/16"
Figure 3:AC Filter and Cable Connections for Epsilon Drives
Environmental Considerations
If the product will be subjected to atmospheric contaminants such as moisture, oils,
conductive dust, chemical contaminants, and metallic particles, you must mount it vertically
in a metal NEMA type 12 enclosure.
If the ambient temperature inside the enclosure will exceed 40° C (104° F), you must consider
forced air cooling.
Note
For Epsilon drives, surrounding air ambient temperature can be up to 50°C (122° F) with
3% linear derating for every degree above 40° C (104° F)
The amount of cooling depends on the size of the enclosure, the thermal transfer of the
enclosure to the ambient air, and the amount of power being dissipated inside the enclosure.
Consult your enclosure manufacturer for assistance with determining cooling requirements.
7
Epsilon Eb Digital Servo Drive Installation Manual
Wiring Notes
•To avoid problems associated with EMI (electromagnetic interference), you should route
high power lines (AC input power and motor power) away from low power lines (encoder
feedback, serial communications, etc.).
•If a neutral wire (not the same as Earth Ground), is supplied from the building distribution
panel it should never be bonded with PE wire in the enclosure.
•You should consider future troubleshooting and repair when installing all wiring. All
wiring should be either color coded and/or tagged with industrial wire tabs.
•As a general rule, the minimum cable bend radius is ten times the cable outer diameter.
•All wiring and cables, stationary and moving, must be protected from abrasion.
•Ground wires should not be shared with other equipment.
•Ensure that metal to metal contact is made between the enclosure ground lug and the metal
enclosure, not simply through the mounting bolt and threads.
•All inductive coils must be suppressed with appropriate devices, such as diodes or
resistor/capacitor (RC) networks.
Mechanical Installation
Drive Mounting
Drives must be back mounted vertically on a metal surface such as a NEMA enclosure. A
minimum spacing of two inches must be maintained above and below the drive for
ventilation. Side by side drive spacing requirements vary by drive size and RMS loading.
Additional space may be necessary for wiring and cable connections.
For drive dimensions, weights and mounting specifications, see the "Specifications" section.
Motor Mounting
Motors should be mounted firmly to a metal mounting surface to ensure maximum heat
transfer for maximum power output and to provide a good ground.
For motor dimensions, weights and mounting specifications, see the “Specifications” chapter.
8
Electrical Installation
Installation
Figure 4:Typical System Grounding Diagram
9
Epsilon Eb Digital Servo Drive Installation Manual
Power Supply Requirements
The examples below show AC power connections for single phase and three phase drives.
These examples are shown for reference only. Local electrical codes should be consulted
before installation.
The Protective Earth (PE) wire connection is mandatory for human safety and proper
operation. This connection must not be fused or interrupted by any means. Failure to
follow proper PE wiring can cause death or serious injury.
Epsilon Only
The Eb-202, Eb-203 and Eb-205 drives require 42 to 264 VAC single-phase power. An
Epsilon drive can be connected to any pair of power phases on a 1 Ø or 3 Ø power source
that is grounded as shown in the following diagrams.
Epsilon Only
If using an APS Logic Power input and the Low DC Bus fault is disabled, minimum
supply voltage to an Epsilon can be reduced to 15 VAC on the AC inputs or 24 VDC on
the Bus +/- connections.
Note
The maximum voltage applied to the drive terminals must not exceed 264 VAC phase to
phase and phase to PE ground. This can be accomplished by referencing the AC supply
to earth ground.
Do not connect or disconnect the AC power by inserting or removing the AC power
connector. Using the connector in this manner, even once, will damage the connector,
making it unusable.
AC Supplies NOT Requiring Transformers
If the distribution transformer is configured as shown in the figures below, the AC power
supply can be connected directly to the amplifier terminals.
10
Figure 5:Earth Grounded WYE Distribution Transformer
Installation
Figure 6:Earth Grounded Delta Distribution Transformer
AC Supplies Requiring Transformers
If the distribution transformer is configured as shown in the figures below, an isolation
transformer is required.
If an isolation transformer is used between the power distribution point and the drives, the
transformer secondary must be grounded for safety reasons as shown in the figures below.
11
Epsilon Eb Digital Servo Drive Installation Manual
Figure 7:Three Phase Delta (with mid-phase GND) Distribution to a Three-Phase
Delta/WYE Isolation Transformer
12
Figure 8:Three Phase WYE (ungrounded) Distribution to a Three-Phase Delta/WYE
Isolation Transformer
Figure 9:Delta to Delta Isolation Transformer
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