Xantrex XFR 6-200, XFR 7.5-140, XFR 12-100, XFR 20-60, XFR 35-35 Operating Manual

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XFR 6-200 XFR 7.5-140 XFR 12-100 XFR 20-60 XFR 35-35 XFR 40-30 XFR 60-20 XFR 100-12 XFR 150-8 XFR 300-4 XFR 600-2

Operating Manual

XFR 1200 Watt Series Programmable DC Power Supply

Operating Manual for

XFR 1200 Watt Series

Programmable DC Power Supply

Limited

Warranty

What does this warranty cover and how long does it last?

This Limited Warranty is provided by Xantrex Technology, Inc. (“Xantrex”) and covers defects in workmanship and materials in your XFR 1200 Watt Series DC Power Supply. This warranty lasts for a Warranty Period of 5 years from the date of purchase at point of sale to you, the original end user customer.

What will Xantrex do?

Xantrex will, at its option, repair or replace the defective product free of charge, provided that you notify Xantrex of the product defect within the Warranty Period, and provided that Xantrex through inspection establishes the existence of such a defect and that it is covered by this Limited Warranty.

Xantrex will, at its option, use new and/or reconditioned parts in performing warranty repair and building replacement products. Xantrex reserves the right to use parts or products of original or improved design in the repair or replacement. If Xantrex repairs or replaces a product, its warranty continues for the remaining portion of the original Warranty Period or 90 days from the date of the return shipment to the customer, whichever is greater. All replaced products and all parts removed from repaired products become the property of Xantrex.

Xantrex covers both parts and labor necessary to repair the product, and return shipment to the customer via a Xantrex-selected non-expedited surface freight within the contiguous United States and Canada. Alaska and Hawaii are excluded. Contact Xantrex Customer Service for details on freight policy for return shipments outside of the contiguous United States and Canada.

How do you get service?

If your product requires troubleshooting or warranty service, contact your merchant. If you are unable to contact your merchant, or the merchant is unable to provide service, contact Xantrex directly at:

Phone: 604 422 8595

Toll Free North America: 1 800 667 8422

Fax: 604 421 3056

Email: info@xantrex.com

ii Operating Manual for XFR 1.2kW Series Power Supply

Direct returns may be performed according to the Xantrex Return Material Authorization Policy described in your product manual. For some products, Xantrex maintains a network of regional Authorized Service Centers. Call Xantrex or check our website to see if your product can be repaired at one of these facilities.

In any warranty claim, dated proof of purchase must accompany the product and the product must not have been disassembled or modified without prior written authorization by Xantrex.

Proof of purchase may be in any one of the following forms:

• The dated purchase receipt from the original purchase of the product at point of

sale to the end user, or

• The dated dealer invoice or purchase receipt showing original equipment

manufacturer (OEM) status, or

• The dated invoice or purchase receipt showing the product exchanged under

warranty

What does this warranty not cover?

This Limited Warranty does not cover normal wear and tear of the product or costs related to the removal, installation, or troubleshooting of the customer’s electrical systems. This warranty does not apply to and Xantrex will not be responsible for any defect in or damage to:

a. the product if it has been misused, neglected, improperly installed, physically

damaged or altered, either internally or externally, or damaged from improper use or use in an unsuitable environment;

b. the product if it has been subjected to fire, water, generalized corrosion,

biological infestations, and high input voltage from lightning strikes;

c. the product if repairs have been done to it other than by Xantrex or its authorized

service centers (hereafter “ASCs”);

d. the product if it is used as a component part of a product expressly warranted by

another manufacturer;

e. the product if its original identification (trade-mark, serial number) markings

have been defaced, altered, or removed.

Release 3.1 iii

Disclaimer Product

THIS LIMITED WARRANTY IS THE SOLE AND EXCLUSIVE WARRANTY PROVIDED BY XANTREX IN CONNECTION WITH YOUR XANTREX PRODUCT AND IS, WHERE PERMITTED BY LAW, IN LIEU OF ALL OTHER WARRANTIES, CONDITIONS, GUARANTEES, REPRESENTATIONS, OBLIGATIONS AND LIABILITIES, EXPRESS OR IMPLIED, STATUTORY OR OTHERWISE IN CONNECTION WITH THE PRODUCT, HOWEVER ARISING (WHETHER BY CONTRACT, TORT, NEGLIGENCE, PRINCIPLES OF MANUFACTURER’S LIABILITY, OPERATION OF LAW, CONDUCT, STATEMENT OR OTHERWISE), INCLUDING WITHOUT RESTRICTION ANY IMPLIED WARRANTY OR CONDITION OF QUALITY, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TO THE EXTENT REQUIRED UNDER APPLICABLE LAW TO APPLY TO THE PRODUCT SHALL BE LIMITED IN DURATION TO THE PERIOD STIPULATED UNDER THIS LIMITED WARRANTY.

IN NO EVENT WILL XANTREX BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES, LOSSES, COSTS OR EXPENSES HOWEVER ARISING WHETHER IN CONTRACT OR TORT INCLUDING WITHOUT RESTRICTION ANY ECONOMIC LOSSES OF ANY KIND, ANY LOSS OR DAMAGE TO PROPERTY, ANY PERSONAL INJURY, ANY DAMAGE OR INJURY ARISING FROM OR AS A RESULT OF MISUSE OR ABUSE, OR THE INCORRECT INSTALLATION, INTEGRATION OR OPERATION OF THE PRODUCT.

Exclusions If this product is a consumer product, federal law does not allow an exclusion of

implied warranties. To the extent you are entitled to implied warranties under federal law, to the extent permitted by applicable law they are limited to the duration of this Limited Warranty. Some states and provinces do not allow limitations or exclusions on implied warranties or on the duration of an implied warranty or on the limitation or exclusion of incidental or consequential damages, so the above limitation(s) or exclusion(s) may not apply to you. This Limited Warranty gives you specific legal rights. You may have other rights which may vary from state to state or province to province.

iv Operating Manual for XFR 1.2kW Series Power Supply

Information WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, UNLESS

SPECIFICALLY AGREED TO BY IT IN WRITING, XANTREX a. MAKES NO WARRANTY AS TO THE ACCURACY, SUFFICIENCY OR SUITABILITY

OF ANY TECHNICAL OR OTHER INFORMATION PROVIDED IN MANUALS OR OTHER DOCUMENTATION PROVIDED BY IT IN CONNECTION WITH THE PRODUCT; AND

b. ASSUMES NO RESPONSIBILITY OR LIABILITY FOR LOSSES, DAMAGES,

COSTS OR EXPENSES, WHETHER SPECIAL, DIRECT, INDIRECT, CONSEQUENTIAL OR INCIDENTAL, WHICH MIGHT ARISE OUT OF THE USE OF SUCH INFORMATION.

THE USE OF ANY SUCH INFORMATION WILL BE ENTIRELY AT THE USER’S RISK.

WARNING:

Limitations

on Use

Information

About Your

Power

Supply

Please refer to your product user manual for limitations on uses of the product. Specifically, please note that this power supply is not intended for use in connection with life support systems and Xantrex makes no warranty or representation in connection with any use of the product for such purposes.

Xantrex Technology, Inc. 8999 Nelson Way Burnaby, British Columbia Canada V5A 4B5

Please record the following information when you first open your Power Supply package:

Model Number ______________________________________________

Serial Number ______________________________________________

Purchased From ______________________________________________

Purchase Date ______________________________________________

Release Release 3.1 (2002-06)

Printed in Canada

Release 3.1 v

Warnings

and

Cautions

Power

Supply

Safety

Warnings and cautions are defined and formatted in this manual as shown below.

WARNING

Describes a potential hazard which could result in injury or death, or, a procedure which, if not performed correctly, could result in injury or death.

CAUTION

Describes a procedure which, if not performed correctly, could result in damage to data, equipment, or systems.

WARNING—High Energy and High Voltage

Exercise caution when using and calibrating a power supply. High energy levels can be stored at the output voltage terminals on a power supply in normal operation. In addition, potentially lethal voltages exist in the power circuit and on the output and sense connectors of a power supply with a rated output greater than 40 V. Filter capacitors store potentially dangerous energy for some time after power is removed.

CAUTION

Operate the power supply in an environment free of flammable gases or fumes. To ensure that the power supply’s safety features are not compromised, use the power supply as specified in this manual and do not substitute parts or make any unauthorized modifications. Contact the service technician for service and repair help. Repairs must be made by experienced service technicians only.

CAUTION

For Use as a Battery Charger When you are using any of these power supplies for battery charging applications, it is essential to provide an appropriately sized fuse or circuit breaker in series between the power supply output and the battery. Installation of a protector (fuse or DC circuit breaker) rated for about 115% of the maximum current rating of the power supply and designed specifically to interrupt the DC voltage of the battery, will provide adequate reverse polarity current protection. Where several power supplies are in parallel, it is best to fuse each one, rather than one large fuse for all.

vi Operating Manual for XFR 1.2kW Series Power Supply

About This Manual

This Operating Manual contains user information for the XFR Series of variable DC output power supplies, available in several voltage models at 1200 Watts. It provides information about features and specifications, installation procedures, and basic functions testing, as well as operating procedures for using both front panel control and remote analog programming functions.

Who Should Use This Manual

This manual is designed for the user who is familiar with basic electrical laws especially as they apply to the operation of power supplies. This implies a recognition of Constant Voltage and Constant Current operating modes and the control of input and output power, as well as the observance of safe techniques while making supply or pin connections and any changes in switch settings.

Main Sections

Section 1 Features and Specifications Describes the power supply and lists

its features and specifications.

Section 2 Installation Goes through basic setup procedures. Describes

inspection, cleaning, shipping, and storage procedures. Includes AC input connection, basic functions testing, and load and sense lines connections.

Section 3 Local Operation Provides procedures for local (front panel)

operation. Includes procedures for using over voltage protection, shutdown function, multiple supplies, and over temperature protection.

Section 4 Remote Operation Covers remote analog programming operation

and remote monitoring of output voltage and current.

Section 5 Calibration Includes calibration for programming and readback

accuracy.

Manual Revisions

The current release of this manual is listed below. Updates may be issued as an addendum.

Release 3.1 (2002-06)

Release 3.1 vii

About This Manual

Power Supply Safety Markings

Alternating Current Off (Supply)

Earth (Ground) Terminal Caution (Hot Surface)

Protective Conductor Terminal Caution (Check manual for

additional information.)

On (Supply)

viii Operating Manual for XFR 1.2kW Series Power Supply

Contents

About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

List of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xi

List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiii

Section 1.

Features and

Specifications

Section 2.

Installation

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Features and Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Front Panel Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Rear Panel Connectors and Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Rear Panel SW1 Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Rear Panel J2 Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Additional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Input Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Additional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Remote Programming and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Environmental Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Basic Setup Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Inspection, Cleaning, and Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Periodic Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Returning Power Supplies to the Manufacturer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Return Material Authorization Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Packaging for Shipping or Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Location, Mounting, and Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

AC Input Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

AC Input Connector and Voltage Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

AC Input Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

AC Input Wire Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Functional Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Power-on Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Voltage Mode Operation Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Current Mode Operation Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Front Panel Function Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Load Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Load Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Making Load Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Inductive Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Release 3.1 ix

Connecting Single Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Connecting Multiple Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Local and Remote Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Sense Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Local Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Using Remote Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Section 3.

Local

Operation

Section 4.

Remote

Operation

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Standard Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Operating Modes and Automatic Crossover . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Shipped Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Setting Output Voltage and Current Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Using Over Voltage Protection (OVP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Front Panel OVP Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Resetting the OVP Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Using the Shutdown Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

STANDBY Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Controlling the Shutdown Function via the J2 Connector . . . . . . . . . . . . . . . . . 63

Using Multiple Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Configuring Multiple Supplies for Series Operation. . . . . . . . . . . . . . . . . . . . . . 66

Configuring Multiple Supplies for Parallel Operation. . . . . . . . . . . . . . . . . . . . . 67

Configuring Multiple Supplies for Split Supply Operation . . . . . . . . . . . . . . . . . 68

Over Temperature Protection (OTP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

User Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Emergency Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Unusual or Erratic Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Troubleshooting for Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Remote Analog Programming of Output Voltage and Current Limit . . . . . . . . . . . . . 74

Remote Programming Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Remote Analog Programming Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Remote Monitoring of Output Voltage and Current . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Readback Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Section 5.

Calibration

x Operating Manual for XFR 1.2kW Series Power Supply

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Calibration Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Service Environment and Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Accessing Calibration Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Calibrating for Programming Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Voltage Programming Circuit Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Current Limit Programming Circuit Calibration . . . . . . . . . . . . . . . . . . . . . . . . . 83

Calibrating for Readback Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Output Voltage Monitor Circuit Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Output Current Monitor Circuit Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

List of Figures

Figure 1.3 Programming and Monitoring SW1 Switch . . . . . . . . . . . . . . . . . . . . . 19

Figure 1.4 Programming and Monitoring J2 Connector . . . . . . . . . . . . . . . . . . . . 20

Figure 1.5 Typical Input Current Characteristics, 85-130 Vac Range. . . . . . . . . . 29

Figure 1.6 Typical Input Current Characteristics, 190-264 Vac Range. . . . . . . . . 29

Figure 1.7 Current Derating for Rack Mounted 6 V Models . . . . . . . . . . . . . . . . . 32

Figure 1.8 Dimensional Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 2.1 Shipping or Storage Carton Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 2.2 AC Input Cover and Strain Relief. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 2.3 Maximum Load Wire Length for 1 V Line Drop . . . . . . . . . . . . . . . . . . 46

Figure 2.4 Bus Bar Shield. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 2.5 Typical Load Connection Hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 2.6 Output Voltage Connector with Shield . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 2.7 Single Load with Local Sensing (Default) . . . . . . . . . . . . . . . . . . . . . . 50

Figure 2.8 Single Load with Remote Sensing. . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 2.9 Multiple Loads with Local Sensing. . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 2.10 Multiple Loads with Remote Sensing . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 2.11 J10 Sense Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 2.12 Connecting Remote Sense Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 3.1 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Figure 3.2 Series Operation of Multiple Supplies . . . . . . . . . . . . . . . . . . . . . . . . . 66

Figure 3.3 Parallel Operation of Multiple Supplies . . . . . . . . . . . . . . . . . . . . . . . . 67

Figure 3.4 Split Supply Operation of Multiple Supplies. . . . . . . . . . . . . . . . . . . . . 68

Figure 3.5 Split Supply Operation of Multiple Supplies. . . . . . . . . . . . . . . . . . . . . 69

Figure 4.1 Connecting Programming Sources to J2 Connector . . . . . . . . . . . . . . 77

Figure 5.1 Programming and Monitoring Calibration Locations . . . . . . . . . . . . . . 81

Release 3.1 xi

List of Figures

xii

Operating Manual for XFR 1.2kW Series Power Supply

List of Tables

Table 1.1 Available Voltage and Current Ranges . . . . . . . . . . . . . . . . . . . . . . . . 15

Table 1.2 Rear Panel SW1 Switch Assignments. . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 1.3 Rear Panel J2 Connector Terminals and Functions . . . . . . . . . . . . . . 21

Table 1.4 Electrical Specifications for 6 V to 35 V Models . . . . . . . . . . . . . . . . . 24

Table 1.5 Electrical Specifications for 40 V to 600 V Models . . . . . . . . . . . . . . . 26

Table 2.1 Basic Setup Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 2.2 Operational AC Input Voltage Ranges and Frequency . . . . . . . . . . . . 41

Table 2.3 AC Wire Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Table 2.4 Current Carrying Capacity for Load Wiring . . . . . . . . . . . . . . . . . . . . . 45

Table 2.5 Rear Panel J10 Sense Connector Terminals and Functions. . . . . . . . 54

Table 3.1 Shipped Configuration (Local Control Mode). . . . . . . . . . . . . . . . . . . . 59

Table 3.2 Switch Settings for Shutdown Circuit Logic . . . . . . . . . . . . . . . . . . . . . 64

Table 3.3 Switch Settings for Over Temperature Recovery Options. . . . . . . . . . 70

Table 3.4 User Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Table 4.1 Remote Programming Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Table 4.2 Power Supply Settings for Different Programming Sources . . . . . . . . 76

Table 4.3 Power Supply Settings for Remote Monitoring of Readback Signals . 78

Release 3.1 xiii

List of Tables

xiv

Operating Manual for XFR 1.2kW Series Power Supply

Section 1. Features and Specifications

Description

This series of power supplies provides low-noise, precisely regulated, variable DC output at 1200 Watts of output power. Over voltage protection (OVP) and thermal shutdown are standard. Front panel controls and indicators are extensive. Select from several remote control choices: standard analog programming, optional isolated programming or readback, and optional GPIB programming or RS-232 control. Remote monitoring of output voltage and currents is a standard feature. Use this power supply either on your bench or in a standard 19 in. (483 mm) rack: the power supply occupies only 1.75 in. (1 U) of vertical rack space. Designed for continuous use in standalone or systems applications, this power supply is typically used to power DC equipment, control magnets, or burn in components. See Table 1.1 for the list of available models.

Table 1.1 Available Voltage and Current Ranges

Model Voltage Range Current Range

6-200 0-6 V 0-200 A

7.5-140 0-7.5 V 0-140 A

12-100 0-12 V 0-100 A

20-60 0-20 V 0-60 A

35-35 0-35 V 0-35 A

40-30 0-40 V 0-30 A

60-20 0-60 V 0-20 A

100-12 0-100 V 0-12 A

150-8 0-150 V 0-8 A

300-4 0-300 V 0-4 A

600-2 0-600 V 0-2 A

Release 3.1 15

Features and Specifications

Features and Options

Simultaneous digital display of both voltage and current.

•

• Ten-turn front panel voltage and current controls for high resolution setting of

the output voltage and current from zero to the rated output.

• Automatic mode crossover into current or voltage mode.

• Front panel push-button control of output standby mode and preview of voltage,

current, or OVP setpoints. Front panel light emitting diode (LED) indicators for voltage and current mode operation, OVP, remote programming mode, and shutdown. Front panel control of OVP.

• Multiple units can be connected in parallel or in series to provide increased

current or voltage.

• Thermal shutdown, latching or auto reset.

• Remote analog voltage and current limit programming with selectable

programming ranges.

• External monitor signals for output voltage and current.

• Isolated analog remote programming control of the output voltage or current and

isolated readback of output voltage and current with the optional ISOL Interface.

• Optional internal GPIB or RS-232 control for remote digital programming and

readback from a computer.

16 Operating Manual for XFR 1.2kW Series Power Supply

Front Panel Controls

See Figure 1.1 to review the controls, LEDs, and meters located on the power supply’s front panel. Check the following sections for additional descriptions of front panel controls and functions.

• “Mechanical Specifications” on page 33

• “Functional Tests” on page 43

• Section 3, “Local Operation”

Features and Specifications

Front Panel Controls

OVP Shutdown LED (OVP)

Local Voltage and Current Limit Setting Preview

Switch (V-I PRESET)

(See page 43 for more information.)

OVP Adjust Potentiometer (OVP SET)

(See page 61 for more information.)

OVP Setting Preview Switch (OVP CHECK)

(See page 61 for more information.)

Current Mode LED

Voltage Mode LED

AC Power

Switch

Output Voltage Control Knob

Output Current Control Knob

Shutdown LED (S/D)

Standby Switch (STANDBY) (See page 63 for more information.)

Remote Programming LED (REM)

Return to Local Programming (LOCAL) (For units with digital programming interface installed.)

Over Temperature Protection LED (OTP)

AC Fail LED (ACF)

Remote Programming LEDs. (For units with digital programming interface installed.)

Current Meter

Voltage Meter

Figure 1.1 Power Supply Front Panel

Release 3.1 17

Features and Specifications

)

Rear Panel Connectors and Switch

Use the rear panel SW1 Programming, Monitoring, and Shutdown Select switch and the rear panel J2 Programming and Monitoring connector to choose among several remote programming and monitoring options. See Figure 1.2 for the switches and connectors available at the rear panel. See “Rear Panel SW1 Switch” on page 19 and “Rear Panel J2 Connector” on page 20 for a list of switches and connector functions, and procedures for using them.

SW1 Switch (See page 19 for more information.)

1 Resistive Programming of Output Voltage 2 Resistive Programming of Output Current Limit 3 Output Voltage Programming Source Range 4 Output Current Limit Programming Source

Range 5 Output Voltage Monitor Range 6 Output Current Monitor Range

Blank Subplate (Replaced if digital programming interface installed.

7 Remote Shutdown Logic 8 Over Temperature Reset Mode

DC Output for Bus Bar Models (See inset and page 45 for more information.)

AC Input Connector (See page 40 for more information.)

J2 Programming and Monitoring Connector (See page 20 for more information.)

J10 Sense Connector (See page 53 for more information.)

1 Return Sense 2 Negative Output

(Return) 3 No connection (N/C) 4 Positive Output 5 Positive Sense

1 Remote Output Voltage Programming Select 2 Remote Output Current Limit Programming

Select 3 Control Ground 4 N/C 5 Voltage Program Signal Return 6 Output Voltage Program Input 7 Current Program Signal Return 8 Output Current Limit Programming Input 9 Voltage Monitor Signal Return 10 Output Voltage Monitor 11 Current Monitor Signal Return 12 Output Current Monitor 13 N/C 14 Shutdown (S/D) Signal Return (–) 15 S/D Input (+)

Figure 1.2 Power Supply Rear Panel

Chassis Ground Scre

Fan Exhaust Vents (Do not block.)

Positive

Output

(+)

Negative Output/Return (–

Output Voltage Connector

(For 60 V to 600 V models.)

18 Operating Manual for XFR 1.2kW Series Power Supply

Features and Specifications

Rear Panel Connectors and Switch

Rear Panel

SW1 Switch

The SW1 Programming, Monitoring, and Shutdown Select switch is an 8-position piano DIP switch located on the power supply’s rear panel. See Figure 1.3. The SW1 switch enables you to choose:

• Resistive programming of output voltage or current limit

• Output voltage and current limit programming scales

• Output voltage and current monitor scales

• Remote shutdown circuit logic

• Over temperature shutdown mode

1 Resistive Programming of Output Voltage 2 Resistive Programming of Output Current 3 Selects Output Voltage Programming Source Range 4 Selects Output Current Limit Programming Source Range 5 Selects Output Voltage Monitor Range 6 Selects Output Current Monitor Range 7 Selects Remote Shutdown Logic 8 Selects Over Temperature Shutdown Reset Mode

Figure 1.3 Programming and Monitoring SW1 Switch

(Switch is shown in factory default configuration.)

Table 1.2 shows the functions assigned to each SW1 switch. Factory defaults are underlined.

Table 1.2 Rear Panel SW1 Switch Assignments

Switch Function Open Closed

SW1-1 1 mA current source for resistive

programming of output voltage

SW1-2 1 mA current source for resistive

programming of output current limit

SW1-3 Output voltage programming source range

select

SW1-4 Output current limit programming source

range select

SW1-5 Output voltage monitor range select 0-5 V 0-10 V

SW1-6 Output current monitor range select 0-5 V 0-10 V

SW1-7 Remote shutdown logic select HIGH=OFF HIGH=ON

SW1-8 Over temperature shutdown reset mode

select

Voltage source programming

0-5 V (0-5 k) 0-10 V

Auto reset

Resistive programming (0-5 k, 0-10 k)

Latch OFF

(0-10 k)

Release 3.1 19

Features and Specifications

Rear Panel Connectors and Switch

Resetting the Switches Before making any changes to the switch settings,

disable the power supply output by pushing the front panel STANDBY switch to its IN position. This temporarily shuts down the power supply. The front panel S/D LED turns on. Then use any small, flat-bladed screwdriver to change the switch settings.

Any of the eight switches on SW1 is OFF (OPEN) when it has been flipped up to break contact, ON (CLOSED) when flipped down to close contact.

Rear Panel J2

Connector

The J2 Programming and Monitoring connector is a 15-terminal wire clamp connector located on the power supply’s rear panel. See Figure 1.4. The J2 connector provides access to the following functions:

• Remote programming of output voltage AND/OR current limit

• Remote monitoring of calibrated readback signals for output voltage and output

current

• Remote control of the shutdown function using a 2.5 V to 15 V signal

1 Remote Output Voltage Programming Select 2 Remote Output Current Limit Programming Select 3 Control Ground 4 N/C 5 Voltage Program Signal Return 6 Output Voltage Programming Input 7 Current Program Signal Return 8 Output Current Limit Programming Input 9 Voltage Monitor Signal Return 10 Output Voltage Monitor 11 Current Monitor Signal Return 12 Output Current Monitor 13 N/C 14 Shutdown (S/D) Signal Return (–) 15 S/D Input (+)

Figure 1.4 Programming and Monitoring J2 Connector

See Table 1.3, on page 21 for the list of the J2 connector terminal numbers, their references, and corresponding functions.

20 Operating Manual for XFR 1.2kW Series Power Supply

Table 1.3 Rear Panel J2 Connector Terminals and Functions

Connector Reference Name Function

Features and Specifications

Rear Panel Connectors and Switch

J2-1 VRMT Remote Output Voltage

Programming Select

J2-2 IRMT Remote Output Current Limit

Programming Select

Selects remote output voltage programming when jumpered to pin 3.

Selects remote output current limit programming when jumpered to pin 3.

J2-3 CNTL GND Control Ground Control ground.

J2-4 N/C No connection None.

J2-5 VPGM− Voltage Program Signal Return Return for voltage program signal.

J2-6 VPGM Output Voltage Programming

Input

Input for voltage programming signals from an analog device.

J2-7 IPGM− Current Program Signal Return Return for current program signal.

J2-8 IPGM Output Current Limit

Programming Input

Input for current limit programming signals from an analog device.

J2-9 VMON− Voltage Monitor Signal Return Return for voltage monitor signal.

J2-10 VMON Output Voltage Monitor Output for output voltage monitor signal.

J2-11 IMON− Current Monitor Signal Return Return for current monitor signal.

J2-12 IMON Output Current Monitor Output for output current monitor signal.

J2-13 N/C No connection None.

J2-14 S/D− Shutdown Signal Return (–) Return for shutdown signal.

J2-15 S/D+ S/D Input (+) Input for shutdown signal.

Release 3.1 21

Features and Specifications

Rear Panel Connectors and Switch

Making J2 Connections

CAUTION

Do not attempt to bias program/monitor signal return (J2 terminals 5, 7, 9, and

11) relative to the supply output because control ground (J2-3) and the program/monitor signal returns are at the same potential as the power supply return in a standard unit. Use the Isolated Programming (ISOL) interface option to allow control from a programming source at a different potential relative to the supply’s output.

CAUTION

To maintain the isolation of the power supply output and prevent ground loops, use an isolated (ungrounded) programming source when operating the power supply via remote analog control at the J2 connector.

Make connections to the J2 connector using its screw-type wire clamps. Before making any connections, turn the power supply OFF and wait until the front panel displays have gone out. You can unplug the connector from the back of the unit in order to make it easier to install the required wiring.

Wiring

WARNING

There is a potential shock hazard at the output when using a power supply with a rated output greater than 40 V. Use load wiring with a minimum insulation rating equivalent to the maximum output voltage of the power supply. For example, select TEW-105, 105 °C, 600 V wiring for use with a 600 V, 2 A model power supply.

For most connectors and jumpers, use any suitable wire such as 16 to 24 AWG stranded wire. For lowest noise performance, use shielded pair wiring of 16 to 24 AWG. Strip wires 0.26 in. (6.5 mm), insert, and tighten the wire clamp.

22 Operating Manual for XFR 1.2kW Series Power Supply

Specifications

Features and Specifications

Specifications

Electrical

Specifications

These specifications are warranted over a temperature range of 0 °C to 50 °C.

Nominal ambient temperature assumed is 25 °C.

Nominal line voltages are 120 Vac and 230 Vac.

See Table 1.4 and Table 1.5 for maximum values for model-dependent specifications.

Specifications are subject to change without notice.

Release 3.1 23

Features and Specifications

Specifications

Table 1. 4 Electrical Specifications for 6 V to 35 V Models

Models 6-200 7.5-140 12-100 20-60 35-35

Output Ratings:

Output Voltage Output Current

Output Power

Line Regulation:

Voltage (0.01% of Vmax + 2 mV) Current (0.01% of Imax + 2 mA)

Load Regulation:

Voltage (0.02% of Vmax + 5 mV) Current (0.02% of Imax + 5 mA)

0-6 V 0-200 A 1200 W

2.6 mV 22 mA

8.2 mV 45 mA

0-7.5 V 0-140 A 1050 W

2.75 mV 16 mA

6.5 mV 33 mA

0-12 V 0-100 A 1200 W

3.2 mV 12 mA

7.4 mV 25 mA

0-20 V 0-60 A 1200 W

4mV 8mA

9mV 17 mA

0-35 V 0-35 A 1225 W

5.5 mV

5.5 mA

12 mV 12 mV

Meter Accuracy:

Voltage (1% of Vmax + 1 count) Current (1% of Imax + 1 count)

0.07 V

2.5 A

0.09 V

1.5 A

0.13 V

1.1 A

0.3 V

0.7 A

0.4 V

0.45 A

Output Noise (0-20 MHz):

Voltage (p-p) 75 mV 75 mV 75 mV 75 mV 120 mV

Output Ripple (rms):

Voltage Current

Drift (30 minutes):

Voltage (0.05% of Vmax) Current (0.8% of Imax)

10 mV 750 mA

3mV 2400 mA

10 mV 500 mA

3.75 mV 1120 mA

10 mV 500 mA

6mV 800 mA

10 mV 500 mA

10 mV 480 mA

10 mV 300 mA

17.5 mV 280 mA

For Resistive Programming:

Voltage (0.6% of Vmax) Current (0.6% of Imax)

Drift (8 hours):

Voltage (0.05% of Vmax) Current (0.05% of Imax)

36 mV 2400 mA

3mV 200 mA

45 mV 840 mA

3.75 mV 70 mA

72 mV 600 mA

6mV 50 mA

120 mV 360 mA

10 mV 30 mA

210 mV 210 mA

17.5 mV

17.5 mA

For Resistive Programming:

Voltage (0.3% of Vmax) Current (0.3% of Imax)

Temperature Coefficient:

Voltage (0.02% of Vmax/°C) Current (0.03% of Imax/°C)

18 mV 600 mA

1.2 mV 60 mA

22 mV 420 mA

1.5 mV 42 mA

36 mV 300 mA

2.4 mV 30 mA

60 mV 180 mA

4mV 18 mA

105 mV 105 mA

7mV

10.5 mA

For Resistive Programming:

Voltage (0.06% of Vmax/°C) Current (0.06% of Imax/°C)

3.6 mV 120 mA

4.5 mV 84 mA

7.2 mV 60 mA

12 mV 36 mA

21 mV 21 mA

OVP Adjustment Range:

(5% to 110% of Vmax) 0.3-6.6 V 0.375-8.25 V 0.6-13.2 V 1-22 V 1.75-38.5 V

Efficiency:

24 Operating Manual for XFR 1.2kW Series Power Supply

0.75 0.78 0.81 0.81 0.83

Features and Specifications

Specifications

1. Minimum output voltage is <0.15% of rated voltage at zero output setting.

2. Minimum output current is <0.5% of model-rated current at zero output setting, when measured on minimum 10% of full power load.

3. For rack mounted 6 V models, derate output current by 1.5 A per °C for operating temperatures between 30 °C and 50 °C. See

4. For input voltage variation over the AC input voltage range, with constant rated load.

5. For 0-100% load variation, with constant nominal line voltage.

6. Current mode noise is measured from 10% to 100% of rated output voltage, full current. For 6 V models, current noise is measured from 2 V to 6 V, full current.

7. Maximum drift over 30 minutes with constant line, load, and temperature, after power on.

8. Maximum drift over 8 hours with constant line, load, and temperature, after 30-minute warm-up.

9. Change in output per °C change in ambient temperature, with constant line and load.

10. Typical efficiency at 100 Vac input voltage and full output power.

“Environmental Specification” on page 32.

Release 3.1 25

Features and Specifications

Specifications

Table 1. 5 Electrical Specifications for 40 V to 600 V Models

Models 40-30 60-20 100-12 150-8 300-4 600-2

Output Ratings:

Output Voltage Output Current

Output Power

Line Regulation:

Voltage (0.01% of Vmax + 2 mV) Current (0.01% of Imax + 2 mA)

Load Regulation:

Voltage (0.02% of Vmax + 5 mV) Current (0.02% of Imax + 5 mA)

0-40 V 0-30 A 1200 W

6mV 5mA

13 mV 11 mA

0-60 V 0-20 A 1200 W

8mV 4mA

17 mV 9mA

0-100 V 0-12 A 1200 W

12 mV

3.2 mA

27 mV

7.4 mA

0-150 V 0-8 A 1200 W

17 mV

2.8 mA

35 mV

6.6 mA

0-300 V 0-4 A 1200 W

32 mV

2.4 mA

65 mV

5.8 mA

0-600 V 0-2 A 1200 W

62 mV

2.2 mA

125 mV

5.4 mA

Meter Accuracy:

Voltage (1% of Vmax + 1 count) Current (1% of Imax + 1 count)

0.5 V

0.4 A

0.7 V

0.3 A

1.1 V

0.13 A

1.6 V

0.09 A

0.05 A

0.03 A

Output Noise (0-20 MHz):

Voltage (p-p) 150 mV 150 mV 150 mV 150 mV 200 mV 400 mV

Output Ripple (rms):

Voltage Current

Drift (30 minutes):

Voltage (0.05% of Vmax) Current (0.8% of Imax)

10 mV 200 mA

20 mV 240 mA

10 mV 100 mA

30 mV 160 mA

10 mV 100 mA

50 mV 96 mA

20 mV 50 mA

75 mV 64 mA

30 mV 25 mA

150 mV 32 mA

80 mV 15 mA

300 mV 16 mA

For Resistive Programming:

Voltage (0.6% of Vmax) Current (0.6% of Imax)

Drift (8 hours):

Voltage (0.05% of Vmax) Current (0.05% of Imax)

240 mV 180 mA

20 mV 15 mA

360 mV 120 mA

30 mV 10 mA

600 mV 72 mA

50 mV 6mA

900 mV 48 mA

75 mV 4mA

1800 mV 24 mA

150 mV 2mA

3600 mV 12 mA

300 mV 1mA

For Resistive Programming:

Voltage (0.3% of Vmax) Current (0.3% of Imax)

Temperature Coefficient:

Voltage (0.02% of Vmax/°C) Current (0.03% of Imax/°C)

120 mV 90 mA

8mV 9mA

180 mV 60 mA

12 mV 6mA

300 mV 36 mA

20 mV

3.6 mA

450 mV 24 mA

30 mV

2.4 mA

900 mV 12 mA

60 mV

1.2 mA

1800 mV 6mA

120 mV

0.6 mA

For Resistive Programming:

Voltage (0.06% of Vmax/°C) Current (0.06% of Imax/°C)

24 mV 18 mA

36 mV 12 mA

60 mV

7.2 mA

90 mV

4.8 mA

180 mV

4.2 mA

360 mV

1.2 mA

OVP Adjustment Range:

(5% to 110% of Vmax) 2-44 V 3-66 V 5-110 V 7.5-165 V 15-330 V 30-660 V

Efficiency:

26 Operating Manual for XFR 1.2kW Series Power Supply

0.83 0.86 0.84 0.84 0.85 0.85

Features and Specifications

Specifications

1. Minimum output voltage is <0.15% of rated voltage at zero output setting.

2. Minimum output current is <0.5% of model-rated current at zero output setting, when measured on minimum 10% of full power load.

3. For input voltage variation over the AC input voltage range, with constant rated load.

4. For 0-100% load variation, with constant nominal line voltage.

5. Current mode noise is measured from 10% to 100% of rated output voltage, full current. For 6 V models, current noise is measured from 2 V to 6 V, full current.

6. Maximum drift over 30 minutes with constant line, load, and temperature, after power on.

7. Maximum drift over 8 hours with constant line, load, and temperature, after 30-minute warm-up.

8. Change in output per °C change in ambient temperature, with constant line and load.

9. Typical efficiency at 100 Vac input voltage and full output power.

Release 3.1 27

Features and Specifications

Specifications

Additional

Specifications

Input

Conditions

Rise Time (No Load, Full Load):

Fall Time (No Load):

Fall Time (Full Load):

6 V to 60 V models: 100 ms; 100 V to 600 V models: 170 ms

6 V model: 1.5 s;

7.5 V to 60 V models: 3 s; 100 V to 600 V models: 4 s

6 V model: 10 ms;

7.5 V to 60 V models: 100 ms; 100 V to 600 V models: 170 ms

Voltage Mode Transient Response:2<3 ms

Time Delay from power on until output stable

7 s maximum

1. Measured with stepped 0-10 V analog programming source and a resistive load.

2. Time for the output voltage to recover within 0.5% of its rated value after a step change in load current of 10% to 90% of rated output with an output setpoint between 50-100% of rated value. Load slew rate <6 A/ms.

Rated AC Input Voltage 100/120/200/220/230/240 Vac (nominal) ±10%

Maximum AC Input Power 2600 VA

Operational AC Input Voltage 85-130 Vac or 190-264 Vac, 1

6 V model: 95-130 Vac or 190-264 Vac, 1 Auto range select function.

Maximum Input Current 20 A maximum at 120 Vac,

12 A maximum at 230 Vac.

Input Frequency Range 47-63 Hz

Power Factor 0.65 minimum at full load and 100 Vac input;

0.55 minimum at full load and 200 Vac input.

φ;

φ.

28 Operating Manual for XFR 1.2kW Series Power Supply

Features and Specifications

Specifications

I N P U T

C U R R E N T

(A)

100% at 85 Vac

100% at 130 Vac

50% 100%0

OUTPUT VOLTAGE

50% at 85 Vac 50% at 130 Vac

Figure 1.5 Typical Input Current Characteristics, 85-130 Vac Range

(Based on 60 V, 20 A model.)

I N P U T

C U R R E N T

(A)

0 50% 100%

OUTPUT VOLTAGE

100% at 190 Vac 100% at 264 Vac 50% at 190 Vac

50% at 264 Vac

O U T P U T

C U R R E N T

O U

T P U

C U R R E N

Figure 1.6 Typical Input Current Characteristics, 190-264 Vac Range

Release 3.1 29

(Based on 60 V, 20 A model.)

Features and Specifications

Specifications

Additional

Features

Switching Frequency 6 V to 40 V models: nominal 78 kHz (156 kHz

Output Hold-up Time Greater than 20 ms (6 V model: 16 ms) with

output ripple); 60 V to 600 V models: nominal 62.5 kHz (125 kHz output ripple).

interruption of AC line, for nominal AC input and full load.

Maximum Voltage Differential from

±600 Vdc

either output to safety ground

Insulation Resistance Input to chassis: >30 MΩ, with 500 Vdc;

Output to chassis: >20 MΩ, with 1000 Vdc.

Isolation Voltage Input to output: 1350 Vac

1. To protect from power surges, the units have a 420 Vac varistor built in to act as an over-voltage clamp. The above insulation resistance specification is subject to be measured with the varistors taken out of the circuit

30 Operating Manual for XFR 1.2kW Series Power Supply

Remote

Programming

and

Monitoring

Features and Specifications

Specifications

Remote Start/Stop and Interlock 2.5-15 V signal or TTL-compatible input,

selectable logic. TTL input impedance: 2 k (in series with one diode drop).

Remote Analog Programming (Full Scale Input)

Remote Monitoring Output voltage and current: 0-5 V, 0-10 V

Remote Programming and Monitoring Accuracy

Maximum Remote Sense Line Drop Compensation

Optional Isolated Program and Readback (V&I)

Optional Digital Control RS-232, GPIB interfaces

Voltage and current programming inputs (source must be isolated): 0-5 k, 0-10 k resistances; 0-5 V, 0-10 V (default) voltage sources. Input impedance (V and I): approximately 100 k.

(default); Output impedance (V and I): approximately 221 Ω. Output short circuit current: approximately 50 mA.

1% zero to full scale output for the default range.

5 V/line (Line drop is subtracted from total voltage available at supply output.)

0-5 V (ISOL interface); input impedance: approx. 200 k; output impedance: low

Release 3.1 31

Features and Specifications

Specifications

Environmental

Specification

Operating Temperature Range 0 °C to 50 °C.

Storage Temperature Range -20 °C to +70 °C

Humidity Range up to 90% RH non-condensing

Operating Altitude Up to 6,500 feet (2000 m)

Storage Altitude Up to 50,000 feet (15 000 m)

Installation Category II

Pollution Degree 2

6 V model: for rack mounted units, derate output current by 1.5 A per °C for operating temperatures between 30 °C and 50 °C. See Figure 1.7.

210

200

190

180

170

160

150

OUTPUT CURRENT (A)

Output current (A)

150

25 30 50

AMBIENT TEMPERATURE (°C)

Figure 1.7 Current Derating for Rack Mounted 6 V Models

32 Operating Manual for XFR 1.2kW Series Power Supply

Mechanical

Specifications

Features and Specifications

Specifications

Front Panel V and I Control 10-turn voltage and current potentiometers

Front Panel Voltage Control

0.02% of maximum voltage

Resolution

Front Panel Voltage and Current Meters

3.5-digit green numeric LED displays. For accuracy specifications, see Table 1.4 and Table 1.5.

AC Input Connector Type 3-terminal 34 A, 250 V, right angle, PC mount, wire

clamp connector with removable strain relief cover

Input Fuses

1 A, 250 V, 5 x 20 mm slow fuse (T), location: F34; 2 A, 250 V, 5 x 20 mm time delay (T), location: F95; 10 A, 250 Vac, 5 x 20 mm fast high interrupt (F), location: F29; 30 A, 300 Vac, 10.3 x 41.3 mm medium time lag (T), locations: F2, F4.

Output Connector 6 V to 40 V models: nickel-plated copper bus bars

with removable bus bar shield; bus bar holes:

0.332 in. (8.17 mm) diameter (D) (1), 0.197 in. (5.0 mm) D (2); 60 V to 600 V models: 4-terminal wire clamp connector.

Sense Connector 5-terminal wire clamp connector (2 piece)

Analog Programming Connector 15-terminal wire clamp connector (2 piece)

Chassis Ground Two chassis ground screws located on rear panel

for bonding connections

Cooling Fan cooled. Air exhausts to rear. Over temperature

shutdown: automatic restart or latch off (switch-selectable).

Mounting Rack mount ears integral to the front panel.

Weight Approximately 18 lb. (8.2 kg)

Approvals CE-marked units are approved to IEC 1010-1

safety standard and EN50081-2 and EN500082-2 EMC standards, and are CSA certified to C22.2 No. 1010.1. CE-marked units are also approved to U.S. requirements of NRTL/C and are UL listed to UL3111-1, 1st edition, (up to 40 °C). Additional standards met: FCC, part 15, class A EMI standard.

Release 3.1 33

Features and Specifications

Specifications

1. Fuses are located on the A4 PCB (printed circuit board). The fuses are NOT operator-replaceable.

19 in. (483 mm)

16.9 in. (429mm)

1.71 in.

(43.4 mm

)

1in. (25.4 mm)

Figure 1.8 Dimensional Drawings

(Dimensions given are nominal.)

20 in. (508 mm)

20" (508 mm)

17.475 in. (444 mm)

34 Operating Manual for XFR 1.2kW Series Power Supply

Section 2. Installation

Introduction

This section provides recommendations and procedures for inspecting, installing, and testing the power supply.

Basic Setup Procedure

See Table 2.1 for a summary of the basic setup procedure and an overall view of the subsections in this section. Use the procedure as a quick reference if you are familiar with the installation requirements for the power supply. If you want more information, each step in the procedure refers to subsequent sections which contain more details. Execute each step in the sequence given.

Table 2.1 Basic Setup Procedure

Step # Description Action Reference

1 Inspection Perform an initial physical inspection of

the supply.

2 Installation Install the supply (bench or rack

mount), ensuring adequate ventilation.

3 Input Power Connect AC input power. “AC Input Power Connection” on

“Inspection, Cleaning, and Packaging” on page 36

“Location, Mounting, and Ventilation” on page 39

page 40

4 Test Perform functional tests for voltage

mode operation, current mode operation, and front panel controls.

5 Load Connect the load. “Load Connection” on page 45

6 Sensing Connect sensing lines. “Local and Remote Sensing” on

“Functional Tests” on page 43

page 53

See Section 3. Local Operation for instructions for front panel operation, OVP and OTP, shutdown, and using multiple supplies. You will find remote programming and monitoring described in Section 4. Remote Operation.

Release 3.1 35

Installation

Inspection, Cleaning, and Packaging

Initial

Inspection

Periodic

Cleaning

When you first receive your unit, perform a quick physical check.

1. Inspect the unit for scratches and cracks, and for broken switches, connectors, and displays.

2. Ensure that the packing box contains the AC input cover and strain relief kit (see Figure 2.2). For 60 V to 600 V models, check that the box also contains the output cable strain relief (see Figure 2.6). For all models, the output connector shield is already installed.

3. Have the service technician check the printed circuit board and its components if you suspect internal damage.

If the unit is damaged, save all packing materials and notify the carrier immediately. See packing instructions in “Packaging for Shipping or Storage” on page 38.

No routine servicing of the power supply is required except for periodic cleaning. Whenever a unit is removed from operation, clean the metal surfaces with naphtha or an equivalent solvent and the front panel with a weak solution of soap and water. Use low-pressure compressed air to blow dust from in and around components on the printed circuit boards.

36 Operating Manual for XFR 1.2kW Series Power Supply

Returning Power Supplies to the Manufacturer

Installation

Returning Power Supplies to the Manufacturer

Return

Material

Authorization

Policy

Before returning a product directly to Xantrex you must obtain a Return Material Authorization (RMA) number and the correct factory “Ship To” address. Products must also be shipped prepaid. Product shipments will be refused and returned at your expense if they are unauthorized, returned without an RMA number clearly marked on the outside of the shipping box, if they are shipped collect, or if they are shipped to the wrong location.

When you contact Xantrex to obtain service, please have your operating manual ready for reference and be prepared to supply:

• The serial number of your product

• Information about the installation and use of the unit

• Information about the failure and/or reason for the return

• A copy of your dated proof of purchase

When you ship:

1. Package the unit safely following the procedures on page 38, preferably using

the original box and packing materials. Please ensure that your product is shipped fully insured in the original packaging or equivalent. This warranty will not apply where the product is damaged due to improper packaging.

2. Include the following:

• The RMA number supplied by Xantrex Technology Inc clearly marked on

the outside of the box.

• A return address where the unit can be shipped. Post office boxes are not

acceptable.

• A contact telephone number where you can be reached during work hours

• A brief description of the problem

Ship the unit prepaid to the address provided by your Xantrex customer service representative.

If you are returning a product from outside of the USA or Canada:

In addition to the above, you MUST include return freight funds and are fully responsible for all documents, duties, tariffs, and deposits.

If you are returning a product to a Xantrex Authorized Service Center (ASC):

A Xantrex return material authorization (RMA) number is not required. However, you must contact the ASC prior to returning the product or presenting the unit to verify any return procedures that may apply to that particular facility.

Release 3.1 37

Installation

Returning Power Supplies to the Manufacturer

Packaging for

Shipping or

Storage

Follow these instructions to prepare the unit for shipping or storage.

1. When returning the unit or sending it to the service center, attach a tag to the unit stating its model number (available from the front panel label) and its serial number (available from the rear panel label). Give the date of purchase and an invoice number, if you have it, as well as a brief description of the problem.

2. For storage or shipping, repack the power supply in its original container. If the original container is not available, seal the unit in a plastic bag and then pack it in a 200 lb. (90 kg) test, corrugated cardboard carton large enough to allow 2 inches (5 cm) of cushioning material to surround the unit. Use a material such as foam slabs or chips.

3. Label the carton as shown in Figure 2.1.

4. If shipping, mark the address of the service center and your return address on the carton.

5. If storing, stack no more than eight cartons high. Check the storage temperature range and storage altitude specification in “Environmental Specification” on page 32.

POWER SUPPLY

Model Number: _______________________

Serial Number: _______________________

FRAGILE — ELECTRONIC EQUIPMENT

Figure 2.1 Shipping or Storage Carton Label

38 Operating Manual for XFR 1.2kW Series Power Supply

Location, Mounting, and Ventilation

Use the power supply in rack-mounted or in benchtop applications.

Rack

Mounting

WARNING

Ensure that any mounting screws do not penetrate more than 1/8 in. (3.0 mm) into the sides of the unit.

The power supply is designed to fit in a standard 1 in. (483 mm) equipment rack. To install:

1. Use the integral rack-mount ears at both sides of the front panel to install the

power supply in a rack.

2. Provide adequate support for the rear of the unit without obstructing the

ventilation inlets on the sides of the unit. Use a support bar at the rear of the unit. Follow the manufacturer’s instructions to install the support bar.

Installation

Location, Mounting, and Ventilation

Angle Bracket Mounting Rack mount slides are not suitable for the 1200 Watt

unit, however, angle brackets are available from the manufacturer.

Ventilation Whether you place the power supply in a rack or on a bench, allow cooling air to

reach the ventilation inlets on the sides of the unit and allow 4 in. (100 mm) of unrestricted air space at the rear of the unit for the fan exhaust. Any ventilation space at the top and bottom of the supply will further lower internal operating temperatures.

Check “Environmental Specification” on page 32 for the operating ambient temperature range and the operating altitude specification.

Release 3.1 39

Installation

AC Input Power Connection

WARNING

Disconnect AC power from the unit before removing the cover. Even with the front panel power switch in the OFF position, live line voltages are exposed when the cover is removed. Repairs must be made by experienced service technicians only.

WARNING

There is a potential shock hazard if the power supply chassis and cover are not connected to an electrical ground via the safety ground in the AC input connector. Ensure that the power supply is connected to a grounded AC outlet with the recommended AC input connector configured for the available line voltage as described in this section

AC Input

Connector

and Voltage

Selection

CAUTION

When power switch is turned on, output voltage or current previously set will be applied to loads.

The AC input connector is a 3-terminal wire clamp located on the power supply’s rear panel. See Figure 2.2 AC Input Cover and Strain Relief.

Auto Range Select

CAUTION

To prevent damage to the power supply, turn off AC power to the unit before changing from one AC input voltage range to another.

The Auto Range Select function built into the 1200 Watt unit allows you to connect to either low or high AC input voltages without making any adjustments to the unit. We warrant that the unit will perform to specification at AC input voltage ranges 85 to 130 Vac and 190 to 264 Vac. See Table 2.2. Between these ranges (at 130 to 190 Vac), the unit will operate normally, although full performance to specification cannot be guaranteed.

40 Operating Manual for XFR 1.2kW Series Power Supply

AC Input Power Connection

Table 2.2 Operational AC Input Voltage Ranges and Frequency

AC Voltage Range Frequency

85-130 Vac 1

φ (20 A maximum at 120 Vac)

47-63 Hz

Installation

AC Input

Cord

190-264 Vac 1

1. 6 V model: 95-130 Vac

φ (12 A maximum at 230 Vac) 47-63 Hz

AC Fail LED The AC Fail (ACF) LED turns on when the input voltage is outside

of the range specified for the power supply. The LED turns off when the input voltage is within the range.

WARNING

The AC input cord is the disconnect device for the power supply. The plug must be readily identifiable by and accessible to the operator. The input cord must be no longer than 9.84 feet (3 m).

The AC input cord we recommend is specified in Table 2.3, “AC Wire Specification”. Add a non-locking plug suitable for use in the country in which you are operating. If you require a special cord, call us.

Table 2.3 AC Wire Specification

Wire Size Ratings Cable Outside Diameter

3 x 12 AWG stranded copper 60 °C minimum, 300 V 0.545-0.708 in.

(13.63-17.7 mm)

60 °C minimum, 300 V 0.545-0.708 in.

(13.63-17.7 mm)

AC Input Wire

Connection

3 x 16 AWG stranded copper

1. Alternate choice for 190-264 Vac input only.

1. Strip the outside insulation on the AC cable approximately 4 in. (100 mm). Trim

the wires so that the ground wire is 0.5 in. (12 mm) longer than the other wires. Strip 0.55" (14 mm) at the end of each of the wires. See Figure 2.2 detail (top).

2. Unscrew the base of the strain relief from the helix-shaped body. Insert the base

through the outside opening in the AC input cover and, from the inside, screw the locknut securely onto the base.

Release 3.1 41

Installation

AC Input Power Connection

3. Slide the helix-shaped body onto the AC cable. Insert the stripped wires through the strain relief base until the outer cable jacket is flush with the edge of the base. Tighten the body to the base while holding the cable in place. The cable is now securely fastened inside the strain relief.

4. Route the AC wires to the input connector terminals as required. For input connector terminal locations, see lower inset in Figure 2.2. To connect the wiring, loosen the terminal screw, insert the stripped wire into the terminal, and tighten the screw securely.

5. Route the wires inside the cover to prevent pinching. Fasten the AC input cover to the unit using the 6-32 x 1 1/4 in. (2) screws, flat washers, and lock washers provided. See Figure 2.2.

Cover

Assembled

Strain Relief

Flat Washer (2 places)

Lock Washer (2 places)

Screw (2 places)

Figure 2.2 AC Input Cover and Strain Relief

Screw-on Locknut

Stripped Wire Installed in Strain Relief

Connector Terminal Locations

42 Operating Manual for XFR 1.2kW Series Power Supply

Functional Tests

These functional test procedures include power-on and front panel function checks as well as voltage and current mode operation checks.

Installation

Functional Tests

Equipment

Required

Power-on

Check

Voltage Mode

Operation

Check

• Digital voltmeter (DVM) rated better than 0.5% accuracy.

• DC shunt 1mV/A (±0.25%) with connecting wire. The recommended current

ratings for the DC shunt and the wire must be at least 10% more than the output current of the power supply.

1. Ensure that the AC power switch is in the OFF position.

2. Ensure that the output sense lines are connected in the default configuration.

(The local sense lines are connected between terminals 1 and 2 and between terminals 4 and 5 on the J10 sense connector as shown on the rear panel diagram in Figure 1.2.)

3. Turn the voltage and current controls fully counter-clockwise.

4. Connect the unit to an AC outlet.

5. Turn the front panel AC power switch to ON.

After a short power-on delay, the front panel digital meters light up and the green voltage mode LED turns on. Both voltmeter and ammeter displays read zero.

1. Ensure the voltage and current controls on the front panel are turned fully

counter-clockwise.

2. Connect a DVM to the output terminals on the rear panel, observing correct

polarity.

3. Turn the current control a 1/2-turn clockwise. Slowly turn the voltage control

clockwise and observe both the front panel voltmeter and the DVM.

4. Compare the DVM reading with the front panel voltmeter reading to verify the

accuracy of the internal voltmeter. Both readings should be the same. The minimum control range is from zero to the maximum rated output for the power supply model. The voltage mode LED turns on.

5. Turn the front panel AC power switch to OFF.

Release 3.1 43

Installation

Functional Tests

Current Mode

Operation

Check

Front Panel

Function

Checks

1. Ensure that the front panel power switch is set to OFF.

2. Turn the voltage and current controls on the front panel fully counter-clockwise.

3. Connect the DC shunt across the output terminals on the rear panel.

4. Connect the DVM across the DC shunt.

5. Turn the AC power switch to ON.

6. Turn the voltage control one (1) or two (2) turns clockwise.

7. Turn the current control slowly clockwise.

8. Compare the DVM reading with the front panel ammeter reading using I=V/R where I is the current, V is the DVM reading, and R is the DC shunt resistance. The minimum control range is from zero to the maximum rated output for the power supply model. The current mode LED turns on.

9. Turn the front panel power switch to OFF.

10. Disconnect the DVM and the shunt.

1. Turn the front panel power switch to ON.

2. Set voltage and current controls fully clockwise. Push the STANDBY switch to its IN position and check that the voltmeter reading falls to zero and the red S/D (Shutdown) LED turns on. Push the STANDBY switch once again to reset it to its OUT position. The S/D LED turns off and the voltmeter reading returns to its previous value.

3. Press the STANDBY switch to its IN position.

4. Press the OVP CHECK switch and check that the voltmeter displays approximately the model-rated output voltage plus 10%.

5. Turn the OVP SET potentiometer counter-clockwise and check that the voltmeter reading decreases. Continued turning (up to 20 turns) will see the reading decrease to approximately 5% of the model-rated voltage output. Turn the OVP SET potentiometer clockwise until the voltmeter once again displays approximately the model-rated output voltage plus 10%.

6. Press the STANDBY switch to its OUT position.

7. Press the V/I CHECK switch and check that the voltmeter and ammeter display approximately the power supply output ratings.

8. Turn the front panel power switch to OFF.

Note You can use the front panel LOCAL button only when a digital programming

interface has been installed in your power supply.

44 Operating Manual for XFR 1.2kW Series Power Supply

Installation

Load Connection

This section provides recommendations for load wires and how to connect them for both single and multiple load configurations.

Load Wiring To select wiring for connecting the load to the power supply, consider the following

factors:

• insulation rating of the wire

• current carrying capacity of the wire

• maximum load wiring length for operation with sense lines

• noise and impedance effects of the load lines

Insulation Rating Use load wiring with a minimum insulation rating equivalent

to the maximum output voltage of the power supply. For example, select TEW-105, 105 °C, 600 V wiring for use with a 600 V, 2 A model power supply.

Current Carrying Capacity As a minimum, load wiring must have a current

capacity greater than the output current rating of the power supply. This ensures that the wiring will not be damaged even if the load is shorted. Table 2.4 shows the maximum current rating, based on 450 A/cm

, for various gauges of wire rated for 105 °C operation. Operating at the maximum current rating results in an approximately 30 °C temperature rise for a wire operating in free air. Where load wiring must operate in areas with elevated ambient temperatures or bundled with other wiring, use larger gauges or wiring rated for higher temperatures.

Table 2.4 Current Carrying Capacity for Load Wiring

Wire Size (AWG)

20 2.5 6 61

18 4 4 97

16 6 2 155

14 10 1 192

12 16 1/0 247

10 21 2/0 303

Maximum Current (A)

Wire Size (AWG)

Maximum Current (A)

836

Release 3.1 45

Installation

Load Connection

Load Wiring Length for Operation with Sense Lines For applications using

remote sensing, you must limit the voltage drop across each load line. Figure 2.3 shows some maximum allowable wire lengths for a given load current and wire size. We recommend that you use the larger load wiring to ensure a smaller voltage drop (1 V typical maximum), although units will compensate for up to 5 V drop in each line. See also Local and Remote Sensing.

WIRE GAUGE (AWG)

100

WIRE LENGTH (FEET)

3456789

30405060708090

1 2/0

2 1/0

100

200

300

400

500

1000

LOAD CURRENT (AMPS)

Figure 2.3 Maximum Load Wire Length for 1 V Line Drop

Noise and Impedance Effects To minimize noise pickup or radiation, use

shielded pair wiring of shortest possible length for load wires. Connect the shield to the chassis via a rear panel mounting screw. Where shielding is impossible or impractical, simply twisting the wires together will offer some noise immunity. When using local sense connections, use the largest practical wire size to minimize the effects of load line impedance on the regulation of the supply.

46 Operating Manual for XFR 1.2kW Series Power Supply

Making Load

Connections

Installation

Load Connection

WARNING

There is a shock hazard at the load when using a power supply with a rated output greater than 40 V. To protect personnel against accidental contact with hazardous voltages, ensure that the load, including connections, has no live parts which are accessible. Also ensure that the insulation rating of the load wiring and circuitry is greater than or equal to the maximum output voltage of the power supply.

CAUTION

When making connections to the bus bars, ensure that each terminal's mounting hardware and wiring assembly are placed to avoid touching the other terminal and shorting the power supply output. Heavy connecting cables must have some form of strain relief to avoid loosening the connections or bending the bus bars.

Make load connections at the rear of the power supply at the positive and negative output bus bars or to the 4-terminal wire clamp connector, depending on the model.

6 V to 40 V Models The 6 V to 40 V (low voltage) models have output bus bars

and may come with a bus bar shield in some configurations. To detach the shield before connecting load wires, remove 6-32 x 1/4 in. screws (2), 6-32 x 3/8 in. screw (1), and lock washers and flat washers (3 places). See Figure 2.4.

Shield

Flat Washer (3 places)

Lock Washer (3 places)

1/4" Screw (2 places)

Figure 2.4 Bus Bar Shield

Release 3.1 47

3/8" Screw (1 place)

Installation

Load Connection

To make load connections to a 7.5 V, 140 A power supply:

1. Install a connecting wire terminal lug to load wiring (see Figure 2.5).

2. Fasten wire terminal lugs to bus bars with 1/4 in. x 1/2 in. (M6 x 12 mm) screws, 1/4 in. (M6) internal tooth lock washers, and hex nuts as shown in Figure 2.5.

Note Bus bar hole sizes for the 6 V to 40 V models (low voltage) are: 1 of 0.332"

(8.17 mm) D; and 2 of 0.197" (5.0 mm) D.

Wire Terminal Lug (2 places)

Screw (2 places)

Figure 2.5 Typical Load Connection Hardware

(For 6 V to 40 V models.)

60 V to 600 V Models

WARNING

To protect personnel against accidental contact with hazardous voltages, ensure that the load, including connections, has no live parts which are accessible. Also ensure that the insulation rating of the load wiring and circuitry is greater than or equal to the maximum output voltage of the power supply.

Assembled View

Lock Washer (2 places)

Hex Nut (2 places)

WARNING

Wear protective gloves and use caution when removing the circular knockout from the shield as described below. The exposed metal edges of the knockout may be sharp.

48 Operating Manual for XFR 1.2kW Series Power Supply

Installation

Load Connection

The 60 V to 600 V (high voltage) models have a 4-terminal, wire clamp output connector. See inset of Figure 2.6 for a labelled drawing of the wire clamp connector. The units are shipped with a protective shield attached (see Figure 2.6). To prepare and connect the load wiring:

3. Use a gloved finger or a blunt tool to push in the circular knockout on the right

side (recommended) of the shield. After you push in the knockout, twist it until it detaches from the shield, and discard.

4. Insert the bushing of the small black strain relief, screw-side out, through the

knockout hole, pushing in from the outside of the shield. You will hear a snap as the strain relief attaches securely to the shield.

5. Strip insulation 0.35" (9 mm) at the end of each of the wires.

6. Loosen the strain relief screw and route the wires through the strain relief.

7. Loosen the connector terminal screw (see inset in Figure 2.6), insert the stripped

wire into the terminal, and tighten the terminal screw securely.

8. Ensure that the wires are not pulled too taut between the terminals and the strain

relief. Tighten the strain relief screw.

Shield

Knockout

Figure 2.6 Output Voltage Connector with Shield

(For 60 V to 600 V models.)

Strain Relief Screw

0.35" (9 mm)

Strain Relief

Te rm in al

Screws

Output Voltage Connector For 60 V to 600 V Models

DC OUTPUT

Positive Output (+)

Stripped Load Wires

S/N: 43

OPT:

Negative Output/Return (−)

Load Wires

Release 3.1 49

Installation

Load Connection

Inductive

Loads

Connecting

Single Loads

To prevent damage to the power supply from inductive kickback, connect a diode across the output. The diode must be rated at greater than or equal to the supply’s output voltage and have a current surge rating greater than or equal to the supply’s output rating. Connect the cathode to the positive output and the anode to the negative output/return.

Where positive load transients such as back EMF from a motor may occur, connect a transorb or a varistor across the output to protect the power supply. The breakdown voltage rating for the transorb or varistor must be approximately 10% higher than the rated supply output.

Figure 2.7 and Figure 2.8 show recommended load and sensing connections for single loads. Local sense lines shown are default connections at the rear panel J10 sense connector.

You do not need remote sensing for basic operation of your supply. However, if you wish to correct any small drops in your load lines, then use the remote sensing feature. See “Local and Remote Sensing” on page 53 for more information.

Figure 2.7 Single Load with Local Sensing (Default)

Figure 2.8 Single Load with Remote Sensing

50 Operating Manual for XFR 1.2kW Series Power Supply

Installation

Load Connection

Connecting

Multiple

Loads

Proper connection of distributed loads is an important aspect of power supply use. Two common methods of connection are the parallel power distribution method and the radial power distribution method.

Parallel Power Distribution This distribution method involves connecting leads

from the power supply to one load, from that load to the next load, and so on for each load in the system. This method results in the voltage at each load depending on the current drawn by the other loads and allows DC ground loops to develop. Except for low current applications, we do not recommend using this method.

Radial Power Distribution Method To connect distributed loads, we

recommend that you use radial power distribution. With this method, you connect power to each load individually from a single pair of terminals designated as the positive and negative distribution terminals. These terminals may be the power supply output terminals, the terminals of one of the loads, or a distinct set of terminals especially established for distribution use. Connect the sense leads to these terminals to compensate for losses and minimize the effect of one load upon another.

Figure 2.9 and Figure 2.10 show recommended load and sensing connections for multiple loads. Local sense lines shown are default J10 sense connections. See “Local and Remote Sensing” on page 53 for more information about using remote sensing, and about grounding the sense line shield.

Figure 2.9 Multiple Loads with Local Sensing

Release 3.1 51

Installation

Load Connection

Figure 2.10 Multiple Loads with Remote Sensing

52 Operating Manual for XFR 1.2kW Series Power Supply

Local and Remote Sensing

Use connections at the rear panel J10 sense connector to configure the power supply for local or remote sensing of output voltage. See Figure 2.11 for a drawing of the sense connector.

Sense Wiring

WARNING

There is a potential shock hazard at the sense connector when using a power supply with a rated output greater than 40 V. Select wiring with a minimum insulation rating equivalent to the maximum output voltage of the power supply for use as local sense jumpers or for remote sense wires. For example, select TEW-105, 105 °C, 600 V wiring for use with a 600 V, 2 A model power supply. Ensure that connections at the load end are shielded to prevent contact with hazardous voltages.

Installation

Local and Remote Sensing

Local

Sensing

For lowest noise performance, use shielded pair wiring of 16 to 24 AWG for remote sense lines. Strip wires 0.26 in. (6.5 mm), insert and tighten the wire clamp.

We ship the power supply with the rear panel J10 sense connector jumpered for local sensing of the output voltage. See Table 2.5 for the list of connector functions and a description of local sense connections. With local sensing, the output voltage is regulated at the output terminals (or bus bars). This method does not compensate for voltage losses in the load lines, so it is recommended only for low current applications or applications for which load regulation is not essential.

Note When using local sense connections, use the largest practical load wire size to

minimize the effects of line impedance on the regulation of the supply.

Figure 2.11J10 Sense Connector

(Shown with local sense jumpers connected.)

Release 3.1 53

Installation

Local and Remote Sensing

Table 2.5 Rear Panel J10 Sense Connector Terminals and Functions

Terminal Name Function

J10-1 Return Sense (–SNS) Remote negative sense connection.

J10-2 Negative Output (Return or RTN) Connected internally to negative output.

J10-3 N/C No connection.

J10-4 Positive Output (+OUT) Connected internally to positive output.

J10-5 Positive Sense (+SNS) Remote positive sense connection.

Using

Remote

Sensing

Default connection to terminal 2.

Default connection to terminal 4.

WARNING

There is a potential shock hazard at the sense points when using a power supply with a rated output greater than 40 V. Ensure that connections at the load end are shielded to prevent contact with hazardous voltages.

CAUTION

Ground the sense line shield in one place only. Locations include: the power supply’s return output connection at the load, the power supply’s return output at its negative output terminal, or at the power supply’s chassis.

CAUTION

Do not use remote sensing with multiple supplies connected in series.

Use remote sensing during voltage mode operation to shift the power supply’s regulation point from its default position at the rear panel output terminals to the load or distribution terminals by using a separate pair of wires to allow the control circuitry to monitor the load voltage. This allows the power supply to compensate for voltage losses in the load lines which will otherwise degrade the regulation of the supply. Line drop is subtracted from the total voltage available at the output.

54 Operating Manual for XFR 1.2kW Series Power Supply

Installation

Local and Remote Sensing

To connect remote sense lines:

1. Turn OFF the power supply.

2. Remove the local sense jumpers connecting J10 mating connector terminal 5

(positive sense) to terminal 4 (positive output) and terminal 1 (return sense) to terminal 2 (power supply return).

3. Connect the positive remote sense lead to J10 mating connector terminal 5

(positive sense) and the negative lead to terminal 1 (return sense). Ensure the mating connector is plugged securely into the rear panel sense connector. Connect the other ends of the sense wires to the corresponding sense points at the load.

4. To prevent ground loops, ground the sense line shield, at one point only, to the

power supply’s return output connection at the load, to the power supply's return output at its negative output terminal, or to the power supply’s chassis.

5. Turn ON the power supply.

Note If you operate the power supply with remote sense lines connected to the load

and with either of the positive or negative load lines not connected, the shutdown circuit will activate, causing the output voltage and current to fall to zero If you operate the power supply without remote sense lines or local sense jumpers in place, the supply will continue to work, but supply regulation will be degraded and/or erratic; or, the OVP circuit may activate.

Figure 2.12 shows a sample setup for using remote sensing.

Release 3.1 55

Installation

Local and Remote Sensing

Figure 2.12Connecting Remote Sense Lines

56 Operating Manual for XFR 1.2kW Series Power Supply

Section 3. Local Operation

Introduction

Once you have installed the power supply and have connected both the AC input power and the load as covered in Section 2. Installation, the power supply is ready to operate in local control mode (that is, operation at the unit’s front panel).

• See “Standard Operation” on page 57 for a brief explanation of Constant Voltage

and Constant Current Mode operation.

• See “Using Over Voltage Protection (OVP)” on page 61 to “Over Temperature

Protection (OTP)” on page 70 for more about power supply functions such as OVP, shutdown function, OTP, and using multiple supplies.

• See “User Diagnostics” on page 71 for troubleshooting information for the

operator.

• Turn to Section 4. Remote Operation for descriptions of remote programming

options and remote monitoring of the power supply.

Standard Operation

This power supply has two basic operating modes: Constant Voltage Mode and Constant Current Mode, and two control modes: Local Control Mode (default setting) and Remote Programming Mode. Both operating modes are available regardless of which control mode is used.

Operating

Modes and

Automatic Crossover

Whether controlled by local or remote programming, the power supply has two basic operating modes: Constant Voltage Mode and Constant Current Mode. The mode in which the power supply operates at any given time depends on the combination of:

• output voltage setting V

• output current limit setting I

• resistance of the attached load R

See Figure 3.1 for a graphical representation of the relationships between these variables.

SET

Release 3.1 57

Local Operation

Standard Operation

Output

Voltage

Constant Voltage Mode Region

V SET

Constant Current Mode Region

I SET

Figure 3.1 Operating Modes

RL > V

Crossover Point

Output Current

SET

Where:

= Load Resistance

= Output Voltage Setting

SET

= Output Current Setting

SET

Constant Voltage Mode Operation The power supply will operate in constant

voltage mode whenever the load current I or: I

< I

(Note: IL = V

SET

/ RL).

is less than the current limit setting I

SET

In constant voltage mode, the power supply maintains the output voltage at the selected value (V

) while the load current IL varies with the load requirements.

SET

Constant Current Mode Operation The power supply will operate in constant

current mode whenever the load resistance is low enough that the load current I equal to the current limit setting I

(Note: VL=I

SET

SETRL

L is

In constant current mode, the power supply maintains the output current at the selected value (I

) while the load voltage varies with the load requirements.

SET

Automatic Mode Crossover This feature allows the power supply to

automatically switch operating modes in response to changing load requirements. If, for example, the power supply was operating in Constant Voltage Mode (I and the load changed so that the load current (I setting (I

), the power supply would automatically switch into Constant Current

SET

) became equal to the current limit

< I

SET

Mode and the output voltage would vary in response to changes in load current. If the additional load was subsequently removed so that the load current was again less than the current limit setting, the supply would automatically return to Constant Voltage Mode.

58 Operating Manual for XFR 1.2kW Series Power Supply

Local Operation

Standard Operation

Shipped

Configuration

The factory ships units already configured for local control (front panel) operation. See Table 3.1

Table 3.1 Shipped Configuration (Local Control Mode)

Local Control Configuration Additional References

Use the front panel controls to adjust the output voltage and current limit settings. (Note: Use the LOCAL button only when you have a digital programming interface installed.)

The supply’s sense point is at the rear panel J10 sense connector terminals.

The OVP set point is adjusted at the front panel to approximately 110% of rated output voltage.

The over temperature shutdown function automatically resets when activated as determined by the position of rear panel switch SW1-8. A latch off setting is also available.

for a summary of this configuration.

See Section 3 operation. See Section 4 analog programming procedure(s).

See

on page 53

local to remote sensing.

See

Protection (OVP)” on page 61 for

the adjustment procedure.

See

(OTP)” on page 70 for more

information about switch SW1-8 settings.

for front panel

for remote

“Local and Remote Sensing”

for how to change from

“Using Over Voltage

“Over Temperature Protection

Release 3.1 59

Local Operation

Standard Operation

Setting

Output

Voltage and

Current Limit

Install the power supply and connect the load as described in Section 2. Installation. Ensure that the power supply is set up for local control as described in

“Shipped

Configuration” on page 59. Then, set the output voltage and current limit at the front panel with the following procedure.

1. Turn both the voltage and current controls fully counter-clockwise.

2. Turn the AC power ON.

3. Press the STANDBY switch to its IN position to disable the power supply output. The red Shutdown (S/D) LED turns on.

4. Press and hold the V/I CHECK button to display the voltage and current control settings on the voltmeter and ammeter displays.

5. Adjust the voltage control to the desired voltage (the compliance voltage for applications using current mode operation).

6. Adjust the current control to the desired current limit setting.

7. Release the V/I CHECK button.

8. Press the STANDBY switch to its OUT position to apply power to the load. The S/D LED turns off.

Note The control circuits have been designed to allow you to set output voltage and

current up to 5% over the model-rated maximum values. The power supply will operate within these extended ranges, but we cannot guarantee full performance to specification.

60 Operating Manual for XFR 1.2kW Series Power Supply

Using Over Voltage Protection (OVP)

The OVP circuit protects the load in the event of a remote programming error, an incorrect voltage control adjustment, or a power supply failure. The protection circuit monitors the output voltage at the output of the power supply and will shut down the main power converter whenever a preset voltage limit is exceeded. Set the preset voltage limit (also called the set point or trip level) using the screwdriver-adjustable, front panel OVP potentiometer, or via one of the optional GPIB or RS-232 programming interfaces.

Note The default preset limit is approximately 110% of the rated output voltage.

When using OVP with remote sensing lines connected, compensate for the voltage line drop across the output return line by measuring or calculating the line drop, then adding this value to the desired OVP setpoint.

Local Operation

Using Over Voltage Protection (OVP)

Front Panel

OVP

Operation

In local control mode, check the OVP set point at any time by pressing the OVP CHECK switch. The OVP set point is the value displayed on the digital voltmeter.

To set the trip level from the front panel:

1. Disconnect any loads. Turn the power supply ON.

2. Adjust the power supply output voltage to any voltage lower than the desired trip

level.

3. Press the front panel STANDBY (output shutdown) switch to its IN position.

The red S/D LED turns on.

4. Press the OVP CHECK switch to see the OVP set point on the voltmeter display.

5. Holding down the OVP CHECK switch, turn the OVP SET potentiometer until

the desired set point is reached. Release the OVP CHECK switch.

6. Press the STANDBY switch to its OUT position. The S/D LED turns off.

7. To check that the power supply shuts off at the desired set point, slowly increase

the output voltage while monitoring the front panel voltmeter. The OVP LED on the front panel turns on when the OVP circuit activates.

Release 3.1 61

Local Operation

Using Over Voltage Protection (OVP)

Resetting the

OVP Circuit

To reset the OVP circuit after it activates:

1. Reduce the power supply’s output voltage setting to below the OVP set point.

2. Press the STANDBY switch IN. The red S/D LED on the front panel turns on. The OVP LED turns off.

3. Press the STANDBY switch again to return power to the load and resume normal operation.

1. Reduce the power supply’s output voltage setting to below the OVP set point.

2. Turn the power supply OFF using the AC power switch, wait until the front panel displays go out, then turn the power supply back ON again.

62 Operating Manual for XFR 1.2kW Series Power Supply

Using the Shutdown Function

Use the shutdown function to disable or enable the supply’s output so that you can make adjustments to either the load or the power supply without shutting off the power supply. Activate this function from the front panel at any time by using the STANDBY switch. You can also activate it via remote control through the rear panel J2 Programming and Monitoring connector, using a 2.5 V to 15 V signal or a transistor-transistor logic (TTL) compatible signal. The input lines for the Shutdown circuit are optically isolated.

Local Operation

Using the Shutdown Function

STANDBY

Switch

Controlling

the Shutdown

Function via

the J2

Connector

The STANDBY switch is a press ON/press OFF switch located on the power supply’s front panel. Push the switch to its IN position to activate the shutdown circuit. The output voltage and current fall to zero and the red S/D (Shutdown) LED turns on. Push the switch once more to reset it to its OUT position and resume normal power supply operation.

The shutdown circuit accepts a 2.5 V to 15 V signal to disable or enable the power supply output. Make connections for signals at connector J2, located on the unit’s rear panel. Set rear panel switch SW1-7 to select signal logic. See “Rear Panel Connectors and Switch” on page 18 for more information about making J2 connector and SW1 switch changes.

To activate the shutdown function:

1. Turn OFF the power supply.

2. Connect the signal source to J2 connector terminal 15 (Shutdown Input/positive)

and terminal 14 (Shutdown Return).

3. Set switch SW1-7 to select the desired circuit logic as set out in Table 3.2.

4. Turn on the power supply. The power supply will operate as described in the

Supply Output column in Table 3.2, according to the logic that you select and the

level of the input signal. The S/D (Shutdown) LED on the front panel turns on when the Shutdown circuit is activated.

Release 3.1 63

Local Operation

Using the Shutdown Function

Table 3.2 Switch Settings for Shutdown Circuit Logic

Switch SW1-7 Setting Source Signal Signal Level Supply Output S/D LED

OFF (OPEN) (Active low, default)

ON (CLOSED) (Active high)

Note If switch SW1-7 is ON but there is no signal applied, the S/D LED turns on and

2-15 V HIGH OFF ON

0-0.4 V LOW ON OFF

2-15 V HIGH ON OFF

0-0.4 V LOW OFF ON

the power supply will not provide an output until the HIGH signal level is applied. Any of the eight switches on SW1 is OFF (OPEN) when it has been flipped up to break contact, ON (CLOSED) when flipped down to close contact.

64 Operating Manual for XFR 1.2kW Series Power Supply

Using Multiple Supplies

WARNING

There is a shock hazard at the load when using a power supply with a rated or combined output greater than 40 V. To protect personnel against accidental

contact with hazardous voltages created by series connection, ensure that the load, including connections, has no live parts which are accessible. Also ensure that the insulation rating of the load wiring and circuitry is greater than or equal to the maximum or combined output voltage of the power supply.

CAUTION

Do not connect power supplies from different manufacturers in parallel or in series.

CAUTION

The remote programming inputs are internally referenced to the supply's negative output. Do not connect remote programming ground lines (J2 terminals 3, 5, and 7) to the supply's positive output.

Local Operation

Using Multiple Supplies

You can operate power supplies of the SAME MODEL with outputs in series or in parallel to obtain increased load voltage or increased current. Split supply operation gives you two positive outputs, or a positive and a negative output.

Note If your application requires the use of isolated programming inputs, contact the

manufacturer about the optional ISOL interface.

Release 3.1 65

Local Operation

Using Multiple Supplies

Configuring

Multiple

Supplies for

Series

Operation

Use series operation to obtain a single higher voltage output using two or more supplies. Connect the negative (–) output terminal of one supply to the positive (+) output terminal of the next supply. See Figure 3.2. The total voltage available is the sum of the maximum voltages of each supply (add voltmeter readings, to a maximum of 600 V). The maximum allowable current for a series string of power supplies is the output current of a single supply in the string.

CAUTION

Do not use remote sensing during series operation.

CAUTION

The maximum allowable sum of the output voltages is 600 Vdc.

Figure 3.2 Series Operation of Multiple Supplies

(Local sense lines shown are default J10 connections.)

66 Operating Manual for XFR 1.2kW Series Power Supply

Local Operation

Using Multiple Supplies

Configuring

Multiple

Supplies for

Parallel

Operation

Use parallel operation to obtain a higher current through a single output using two or more supplies. Set all of the OVP setpoints to maximum. (See “Using Over Voltage Protection (OVP)” on page 61.) Set all of the outputs to the same voltage before connecting the positive (+) output terminals and negative (–) output terminals in parallel. See Figure 3.3. The total current available is the sum of the maximum currents of each supply.

When operating multiple supplies in parallel, the operating mode of each supply depends on the load current being drawn. For example, with two 40 V, 30 A model power supplies operating in parallel with a 50 A load, one supply operates in constant current mode supplying 30 A and the other supply operates in voltage mode supplying the remaining 20 A. The level of current sharing between units depends on how accurately the output voltages are matched.

Note If you do not fix the OVP setpoints at maximum, the OVP circuit may trip on one

unit, reducing the current available to the load.

Sensing for Parallel Operation Use default local sensing to enhance power

sharing between units, as the impedance of the load lines will tend to correct for current imbalance. If you use remote sensing at the load for better voltage regulation, one supply always operates in current limit mode and supplies most of the power.

Figure 3.3 Parallel Operation of Multiple Supplies

Release 3.1 67

(Local sense lines shown are default J10 connections.)

Local Operation

Using Multiple Supplies

Configuring

Multiple Supplies for Split Supply

Operation

Split supply operation uses two power supplies to obtain two positive voltages with a common ground, or to obtain a positive-negative supply.

Two Positive Voltages To obtain two positive voltages, connect the negative

output terminals of both supplies together in a common connection. The positive output terminals will provide the required voltages with respect to the common connection. See Figure 3.4.

Figure 3.4 Split Supply Operation of Multiple Supplies

(Two Positive Voltages) (Local sense lines shown are default J10 connections.)

Positive-negative Supply

CAUTION

To prevent possible damage to the supply, do not connect the remote program return line of the negative supply to the common connection.

To obtain a positive-negative supply, connect the negative output terminal of one supply to the positive output terminal of the second supply. The positive output terminal of the first supply then provides a positive voltage relative to the common connection while the negative output terminal of the second supply provides a negative voltage. You can set the current limits independently. The maximum current available in split supply operation is equal to the rated output of the supplies. For example, 30 A for two 40 V, 30 A models. See Figure 3.5.

68 Operating Manual for XFR 1.2kW Series Power Supply

Figure 3.5 Split Supply Operation of Multiple Supplies

(Positive-negative Supply) (Local sense lines shown are default J10 connections.)

Local Operation

Using Multiple Supplies

Release 3.1 69

Local Operation

Over Temperature Protection (OTP)

The OTP function allows you to select how the power supply recovers from an over temperature shutdown using the rear panel switch SW1-8. See Table 3.3 switch settings and selections. See “Rear Panel Connectors and Switch” on page 18 for more information about the switch. The OTP shutdown circuit activates before the internal components can exceed their safe internal operating temperatures. When an OTP shutdown occurs, the front panel OTP LED turns on.

Table 3.3 Switch Settings for Over Temperature Recovery Options

for the

Switch SW1-8

OFF (OPEN) Auto Reset (Default) The supply recovers to normal operation

ON (CLOSED) Latch OFF After an over temperature shutdown, the

OTP Shutdown Selection

Description

when the over temperature condition no longer exists.

supply stays off until you turn the AC power switch OFF, then you turn the power supply ON to continue use.

70 Operating Manual for XFR 1.2kW Series Power Supply

User Diagnostics

If your power supply is not performing as described in this manual, run through the procedures and checks in this section before calling your service technician. These procedures are confined to operator level functions only and do not require cover-off servicing.

Local Operation

User Diagnostics

Emergency

Shutdown

Unusual or

Erratic

Operation

In an emergency, carry out both of these steps:

1. Shut the power supply OFF immediately.

2. Disconnect the power supply from the load.

If the power supply displays any unusual or erratic operation, follow these steps:

1. Shut the power supply OFF immediately.

2. Disconnect the power supply from the load.

3. Test the power supply with no load, running the tests in “Functional Tests” on page 43.

4. If the tests show that the power supply is functioning normally, check all load, programming, and monitoring connections and circuits.

5. Check the AC input for correct voltage and frequency.

If the problem is not solved after following this procedure, or if the unit fails to operate correctly upon retesting, call your service technician.

Turn to the next page for more information about troubleshooting for operators.

Troubleshooting

for Operators

Use the checks in Table 3.4 to ensure that the power supply is configured and connected for normal operation. If you need any further troubleshooting, call your service technician.

Abbreviated References Used in Table

ACF AC Fail

OTP over temperature protection

OVP over voltage protection

REM remote mode

S/D shutdown

Release 3.1 71

Local Operation

User Diagnostics

Table 3. 4 User Diagnostics

Symptom Check Further Checks and Corrections

No output and the display is blank.

Is input voltage within specified range?

Power switch ON? Turn on power.

Internal circuit? See your service technician.

No output but the display turns on.

OVP LED turned on? See page 61.

Front panel S/D LED turned on? See page 63.

OTP LED turned on? See page 70.

Current limit set to zero? See page 57.

Voltage control set to zero? See page 57.

REM LED turned on? If using remote analog control, check

Is front panel ACF LED turned on? Connect unit to AC supply in specified

Internal circuit. See your service technician.

Output not adjustable. Is unit in current limit mode? (Red

Current Mode LED turned on.)

Connect to appropriate voltage source. See page 40.

your analog programming source (Section 4). If not, refer to your digital interface manual.

range. See page 40.

Turn current knob clockwise to increase current limit. Reduce load if current is at maximum. See page 57.

Is unit in remote mode? (Green REM LED turned on.)

If using remote analog control, check your analog programming source (Section 4). If not, refer to your digital interface manual.

Output voltage fluctuating or regulation poor.

Is unit at maximum voltage or current limit?

Is unit at current limit? Increase current limit setting or reduce

Is input voltage within specified range?

Reduce load for lower voltage or current requirement.

load. See page 57.

Connect to appropriate AC voltage source. See page 40.

Are sense lines connected? See page 45

and page 53.

Is unit under remote analog control? Ensure program source is stable.

Internal circuit. See your service technician.

Output oscillating. Internal circuit. See your service technician.

72 Operating Manual for XFR 1.2kW Series Power Supply

Section 4. Remote Operation

Introduction

The rear panel switches and connector on the power supply allow you to program the supply with an analog device or to output readback signals. This section covers the following topics:

• See “Remote Analog Programming of Output Voltage and Current Limit” on

page 74 for procedures covering remote analog programming of output voltage and current limit with 0-5 V and 0-10 V voltage sources and 0-5 k and 0-10 k resistances.

• See “Remote Monitoring of Output Voltage and Current” on page 78 for more

about the connector and switch settings for using calibrated readback signals for output voltage and output current with selectable 0-5 V or 0-10 V scales.

Isolated Programming The 4-channel Isolated (ISOL) Programming Interface

is an internal card which can be ordered as an option. It allows remote programming and readback of the power supply’s output voltage and current limit with 0-5 V analog signals at a different voltage potential relative to the power supply’s output. Contact the manufacturer to order the ISOL Interface.

Remote Digital Programming You can operate the power supply from a

computer if you have had the GPIB or RS-232 Interface card installed as an option. Refer to the separate interface manual for all setup and operation instructions for remote digital programming.

Release 3.1 73

Remote Operation

Remote Analog Programming of Output Voltage and Current Limit

Remote analog programming allows control of the power supply’s output voltage and/or current limit to shift from local operation at the front panel voltage and current controls to external analog sources. As you vary the external programming source, the power supply’s output varies proportionally over its output range.

Using remote analog programming requires that you reset switch SW1 and make connections to the J2 connector on the power supply’s rear panel. See “Rear Panel Connectors and Switch” on page 18.

Remote

Programming

Options

Remote

Analog

Programming

Procedure

See Table 4.1 for a summary of the options available to you for programming output voltage and current limit using an analog source.

Table 4.1 Remote Programming Options

Control of... Programming Scales

Output Voltage and/or 0-5 V and 0-10 V voltage sources

Current Limit 0-5 k and 0-10 k resistances

1. These scales may be used in any combination.

CAUTION

The remote programming inputs are internally referenced to the supply’s negative output. Do not connect control ground (J2 terminals 3, 5, or 7) to the supply's positive output.

1. Turn the power supply OFF.

2. Set switches SW1-1, SW1-2, SW1-3, and SW1-4 according to the programming sources that you are using, as indicated in Table 4.2. See Notes at the end of this procedure for more information about switch settings.

3. Install any required J2 connector jumpers as indicated in Table 4 .2 .

4. Connect the programming source(s) to the mating J2 connector as shown in Figure 4.1 and observe the correct polarity for voltage sources. Ensure that the mating connector is plugged securely into the rear panel connector.

74 Operating Manual for XFR 1.2kW Series Power Supply

Remote Operation

Remote Analog Programming of Output Voltage and Current Limit

5. Set the programming sources to the desired levels and turn the power supply ON.

The REM LED turns on. Adjust the external programming source to change the power supply’s output.

Please remember:

1. Any of the eight switches on SW1 is OFF (OPEN) when it has been flipped up

to break contact, ON (CLOSED) when flipped down to close contact.

2. Resetting switches SW1-3 or SW1-4, the programming scale selection switches,

may require that you recalibrate the programming circuit to maintain programming accuracy. See Section 5. Calibration.

3. Switches SW1-5, SW1-6, SW1-7, and SW1-8 are not required for remote

programming. They remain at the settings you have selected for your application.

4. Switches SW-1 to SW-4 can be set to their defaults (1 and 2 open, 3 and 4 closed)

unless otherwise specified in Table 4.2. See “Rear Panel SW1 Switch” on page 19 for default settings.

5. The control circuits have been designed to allow you to set output voltage and

current up to 5% over the model-rated maximum values. The power supply will operate within these extended ranges, but we cannot guarantee full performance to specification.

Release 3.1 75

Remote Operation

Remote Analog Programming of Output Voltage and Current Limit

Table 4.2 Power Supply Settings for Different Programming Sources

Output Voltage

Output Current Limit Programming Source

0-5 Vdc 0-10 Vdc 0-5 k Resistor 0-10 k Resistor None (Front

Programming Source

0-5 Vdc SW1:

set 3 and 4 open. J2: jumper 1 to 3 and 2 to 3.

0-10 Vdc SW1:

set 4 open. J2: jumper 1 to 3 and 2 to 3.

0-5 k Resistor SW1:

set 1 closed, 3 and 4 open. J2: jumper 1 to 3 and 2 to 3.

0-10 k Resistor

SW1: set 1 closed, 4 open. J2: jumper 1 to 3 and 2 to 3.

SW1: set 3 open. J2: jumper 1 to 3 and 2 to 3.

SW1: default settings. J2: jumper 1 to 3 and 2 to 3.

SW1: set 1 closed, 3 open. J2: jumper 1 to 3 and 2 to 3.

SW1: set 1 closed. J2: jumper 1 to 3 and 2 to 3.

SW1: set 2 closed, 3 and 4 open. J2: jumper 1 to 3 and 2 to 3.

SW1: set 2 closed, 4 open. J2: jumper 1 to 3 and 2 to 3.

SW1: set 1 and 2 closed, 3 and 4 open. J2: jumper 1 to 3 and 2 to 3.

SW1: set 1 and 2 closed, 4 open. J2: jumper 1 to 3 and 2 to 3.

SW1: set 2 closed, 3 open. J2: jumper 1 to 3 and 2 to 3.

SW1: set 2 closed. J2: jumper 1 to 3 and 2 to 3.

SW1: set 1 and 2 closed, 3 open. J2: jumper 1 to 3 and 2 to 3.

SW1: set 1 and 2 closed. J2: jumper 1 to 3 and 2 to 3.

Panel Control)

SW1: set 3 open. J2: jumper 1 to

SW1: default settings. J2: jumper 1 to

SW1: set 3 open, 1 closed. J2: jumper 1 to

SW1: set 1 closed. J2: jumper 1 to

None (Front Panel Control)

SW1: set 4 open. J2: jumper 2 to

SW1: default settings. J2: jumper 2 to

SW1: set 2 closed, 4 open. J2: jumper 2 to

SW1: set 2 closed. J2: jumper 2 to

SW1: default settings. J2: no jumper

76 Operating Manual for XFR 1.2kW Series Power Supply

Remote Operation

Remote Analog Programming of Output Voltage and Current Limit

Figure 4.1 Connecting Programming Sources to J2 Connector

Release 3.1 77

Remote Operation

Remote Monitoring of Output Voltage and Current

Readback

Signals

The J2 connector on the rear panel provides access to calibrated readback signals for remote monitoring of the output voltage and current. Rear panel switches SW1-5 and SW1-6 allow you to select either a 0-5 Vdc or a 0-10 Vdc range for the output. The readback signal represents 0 to 100% of the power supply's output.

See Table 4.3 for the required J2 connections and switch settings for remote monitoring of readback signals with 0-5 Vdc or 0-10 Vdc outputs. Use shielded pair wiring (20 to 24 AWG) and ground the shield to J10 sense connector terminal 1 (return sense) or to the chassis.

Table 4.3 Power Supply Settings for Remote Monitoring of Readback Signals

Readback Signal

Output Voltage (0-5 Vdc)

Output Voltage (0-10 Vdc)

Output Current (0-5 Vdc)

Output Current (0-10 Vdc)

J2 Connection Signal (+)

J2-10 J2-9 SW1-5 OFF (OPEN)

J2-10 J2-9 SW1-5 ON (CLOSED)

J2-12 J2-11 SW1-6 OFF (OPEN)

J2-12 J2-11 SW1-6 ON (CLOSED)

J2 Connection Return (–)

Switch SW1 Setting

Note Check the readback accuracy any time you reset switches SW1-5 and SW1-6.

See Section 5. Calibration

78 Operating Manual for XFR 1.2kW Series Power Supply

Section 5. Calibration

Introduction

WARNING

HIGH ENERGY AND HIGH VOLTAGE WARNING

Adjustments to programming and readback accuracy for the power supply are made using cover-off procedures which must be performed by a service technician.

Calibration Setup

Service

Environment

and

Precautions

Equipment

Required

• Follow established antistatic procedures.

• Work at a bench with adequate room and support for the test unit and for all

equipment required.

• To reduce shock hazard, use only an insulated, straight-bladed screwdriver when

calibrating trim potentiometers.

• NEVER calibrate these units alone. Ensure that someone is present who can help

should an accident occur.

You will need the following equipment when calibrating your power supply.

• 5 1/2-digit true RMS voltmeters (DVMs) (±0.05% accuracy) with test leads

• Current shunt 1 mV/AMP (±0.25%) and connecting wire. The recommended

current ratings for the DC shunt and connecting wire must be at least 10% greater than the power supply’s output current rating. See also Table 2.4, “Current Carrying Capacity for Load Wiring”.

• Non-conducting, straight-bladed screwdriver

Release 3.1 79

Calibration

Calibration Setup

Accessing

Calibration

Potentiometer

WARNING

Disconnect AC power from the unit before removing the cover. Even with the front panel power switch in the OFF position, live line voltages are exposed when the cover is removed. Repairs and adjustments must be made by experienced service technicians only.

WARNING

Use a non-conducting, straight-bladed screwdriver to adjust the trim pots.

CAUTION

Follow established antistatic procedures. There are static-sensitive parts on the printed circuit boards.

You will need to remove the power supply’s cover to access the programming and readback calibration potentiometers which are located on the A2 PCB. See Figure 5.1 to locate the potentiometers.

Removing Option Card If there is a GPIB or RS-232 option card (PCB) installed

inside the power supply, you will have to remove it to access the calibration potentiometers.

Tool Required: Phillips #2 screwdriver

1. Turn OFF the power supply. Disconnect AC Power. Remove the cover.

2. Remove four screws from their standoffs inside the power supply to release the option card.

3. Remove two screws at the rear panel to release the option card’s subplate.

4. Unplug the ribbon cable connectors from the option card. Lift out card.

80 Operating Manual for XFR 1.2kW Series Power Supply

Figure 5.1 Programming and Monitoring Calibration Locations

(Top view.)

Calibration

Calibration Setup

Release 3.1 81

Calibration

Calibrating for Programming Accuracy

The factory calibrates the offset and range of the voltage and current programming circuits to within 1% for the default 0-10 Vdc programming signals. You may need to recalibrate when you use 0-5 Vdc programming or when you switch back to 0-10 Vdc programming after previously calibrating for 0-5 Vdc programming.

See “Calibration Setup” on page 79 for the procedures to remove the cover and any option card. Follow all procedure steps in the sequence given.

Voltage

Programming

Circuit

Calibration

1. Ensure that the power supply is turned OFF. Disconnect any load.

2. Connect the program source between J2 connector terminals 6 (output voltage program input) and 5 (voltage program signal return).

3. Connect the DVM across the power supply output.

4. Turn the power supply ON.

5. Apply 1% of program voltage.

6. Adjust the voltage program offset potentiometer (R472) until the DVM reads 1% of the model-rated output voltage.

7. Apply 100% of program voltage.

8. Adjust the voltage program range potentiometer (R462) until the DVM reads the model-rated output voltage.

Repeat this procedure until output levels are adjusted to specifications (see Section 1. Features and Specifications) or to the accuracy that your application requires.

82 Operating Manual for XFR 1.2kW Series Power Supply

Calibration

Calibrating for Programming Accuracy

Current Limit

Programming

Circuit

Calibration

1. Ensure that the power supply is turned OFF. Disconnect any load.

2. Connect the program source between J2 connector terminals 8 (output current

limit programming input) and 7 (current program signal return).

3. Connect the shunt and DVM across the power supply output.

4. Turn the power supply ON.

5. Apply 1% of program voltage.

6. Adjust the current limit program offset (R469) until the shunt/DVM indicates

1% of the model-rated output current. See Note.

7. Apply 100% of program voltage.

8. Adjust the current limit program range (R459) until the shunt/DVM indicates the

model-rated output current. See Note.

Repeat this procedure until output levels are adjusted to specifications (see Section 1. Features and Specifications) or to the accuracy that your application requires.

Note Calculate the required DVM reading using V= IR where V is the DVM reading, I is

the current, and R is the DC shunt resistance.

Release 3.1 83

Calibration

Calibrating for Readback Accuracy

The factory calibrates the offset and range of the output voltage and current monitor circuits to within 1% for the default 0-10 Vdc scales. You may need to recalibrate when you select the 0-5 Vdc scale or when you switch back to the 0-10 Vdc scale after previously calibrating for 0-5 Vdc operation.

See “Calibration Setup” on page 79 for the procedures to remove the cover and any option card. Follow all procedure steps in the sequence given.

Output

Voltage

Monitor

Circuit

Calibration

1. Ensure that the power supply is turned OFF. Disconnect any load.

2. Set SW1 switch 5 OPEN to select 0-5 V output voltage monitor range, CLOSED for 0-10 V.

3. Connect a DVM across the power supply output to read the output voltage. Connect a second DVM between the rear panel J2 connector terminals 10 (output voltage monitor) and 9 (voltage monitor signal return).

4. Turn the power supply ON.

5. Set the power supply output voltage to 1% of the model-rated output.

6. Adjust the output voltage monitor offset (R397) until the monitor DVM reads 1% of the readback scale. (50 mVdc for 0-5 V readback or 100 mVdc for 0-10 Vdc readback.)

7. Set the power supply output voltage to the model-rated maximum.

8. Adjust the output voltage monitor range (R387) until the monitor DVM reads 100% of the readback scale. (5 Vdc for 0-5 V readback or 10 Vdc for 0-10 Vdc readback.)

Repeat this procedure until the monitor signal is adjusted to specifications (see Section 1. Features and Specifications) or to the accuracy that your application requires.

84 Operating Manual for XFR 1.2kW Series Power Supply

Calibration

Calibrating for Readback Accuracy

Output Current Monitor

Circuit

Calibration

1. Ensure that the power supply is turned OFF. Disconnect any load.

2. Set SW1 switch 6 OPEN to select 0-5 V output current monitor range, CLOSED for 0-10 V.

3. Connect the shunt and DVM across the power supply output to read the output current. Connect a second DVM between the rear panel J2 connector terminals 12 (output current monitor) and 11 (current monitor signal return).

4. Turn the current control fully counter-clockwise, then turn on the power supply.

5. Set the power supply’s output current to 1% of the model-rated output. See Note.

6. Adjust the output current monitor offset (R394) until the monitor DVM indicates 1% of the readback scale. (50 mVdc for 0-5 V readback or 100 mVdc for 0-10 Vdc readback.)

7. Set the power supply output current to the model-rated output.

8. Adjust the output current monitor range (R383) until the monitor DVM indicates 100% of the readback scale. (5 Vdc for 0-5 V readback or 10 Vdc for 0-10 Vdc readback.)

Repeat this procedure until the monitor signal is adjusted to specifications (see Section 1. Features and Specifications) or to the accuracy that your application requires.

Note Calculate the required DVM reading using V= IR where V is the DVM reading, I is

the current, and R is the DC shunt resistance.

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