Xantrex XHR 7.5-130, XHR 20-50, XHR 33-33, XHR 40-25, XHR 60-18 User Guide

...

Download

XHR 1000 Watt Series Programmable DC

XHR 7.5-130 XHR 20-50 XHR 33-33 XHR 40-25 XHR 60-18 XHR 100-10 XHR 150-7 XHR 300-3.5 XHR 600-1.7

Operating Manual

Power Supply

Operating Manual for

XHR 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 XHR 1000 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 XHR 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.

Revision A 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 XHR 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

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

Information

About Your

Power

Supply

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

Model Number ______________________________________________

Serial Number ______________________________________________

Purchased From ______________________________________________

Purchase Date ______________________________________________

Release Revision A (2004-03)

Printed in Canada

Revision A 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 XHR Series Power Supply

About This Manual

This Operating Manual contains user information for the XHR Series DC output power supply, available in several models at 1000 watts. It provides information on features and specifications, installation procedures, and basic functions testing, as well as procedures for operating the power supply at the front panel or from a remote device.

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, lists its

features, and provides tables of specifications.

Section 2 Installation Provides procedures for inspecting, installing, and testing

the power supply. Includes descriptions of the rear panel switch and connector, and considerations for load wiring, load connections, and remote sensing.

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 Shows how to control the power supply voltage

and current limit from a remote analog source using the rear panel SW1 switch and J2 connector. Includes both remote analog programming and readback. Discusses the Isolated Programming Interface (ISOL) option.

Section 5 Calibration Provides procedures for calibrating programming and

readback accuracy.

Manual Revisions

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

Revision A (2004-03)

Revision A 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 XHR Series Power Supply

Contents

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

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

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

Section 1.

Features and

Specifications

Section 2.

Installation

Revision A ix

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

Features and Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Front Panel Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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

Rear Panel Illustrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

SW1 Programming Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

J2 Programming Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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

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

Additional Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Input Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Remote Programming and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Basic Setup Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Inspection, Cleaning, and Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Periodic Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Returning Power Supplies to the Manufacturer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Return Material Authorization Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Packaging for Shipping or Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Location, Mounting, and Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

AC Input Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Functional Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Power-on Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Voltage Mode Operation Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Current Mode Operation Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Front Panel Function Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Load Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Load Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Making Load Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Inductive Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Connecting Single Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Connecting Multiple Loads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Local and Remote Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Sense Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Local Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Using Remote Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Section 3.

Local

Operation

Section 4.

Remote

Operation

Standard Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Operating Modes and Automatic Crossover . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Shipped Configuration (Local Control Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Setting Output Voltage and Current Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Using Multiple Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Configuring Multiple Supplies for Series Operation. . . . . . . . . . . . . . . . . . . . . . 55

Configuring Multiple Supplies for Parallel Operation. . . . . . . . . . . . . . . . . . . . . 56

Configuring Multiple Supplies for Split Supply Operation . . . . . . . . . . . . . . . . . 57

Using Over Voltage Protection (OVP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Front Panel OVP Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Resetting the OVP Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Using the Shutdown Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

STANDBY Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Controlling the Shutdown Function via the J2 Connector . . . . . . . . . . . . . . . . . 61

Over Temperature Protection (OTP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

User Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Emergency Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Unusual or Erratic Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Troubleshooting for Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Remote Analog Programming of Output Voltage and Current Limit . . . . . . . . . . . . . 67

Remote Programming Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Remote Analog Programming Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Sample Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Remote Monitoring of Output Voltage and Current . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Readback Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Using the Isolated Programming (ISOL) Interface Option . . . . . . . . . . . . . . . . . . . . . 72

ISOL Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

ISOL Setup and Operating Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

ISOL Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Section 5.

Calibration

x Operating Manual for XHR Series Power Supply

Calibration Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Service Environment and Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Front Panel Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Additional Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Voltmeter Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Ammeter Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Over Voltage Protection (OVP) Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Calibrating for Programming Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Voltage Programming Circuit Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Current Programming Circuit Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Calibrating for Readback Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Output Voltage Monitor Circuit Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Output Current Monitor Circuit Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

List of Figures

Figure 1.1 Power Supply Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 1.2 Rear Panel with Bus Bar. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 1.3 Rear Panel with High Voltage Output Connector . . . . . . . . . . . . . . . 19

Figure 1.4 SW1 Programming Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Figure 1.5 J2 Programming Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 1.6 Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 2.1 Shipping or Storage Carton Label . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 2.2 Maximum Load Wire Length for 1 V Line Drop. . . . . . . . . . . . . . . . . 40

Figure 2.3 Bus Bar Shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 2.4 Typical Load Connection Hardware . . . . . . . . . . . . . . . . . . . . . . . . .43

Figure 2.5 Output Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 2.6 Single Load with Local Sensing (Default) . . . . . . . . . . . . . . . . . . . . . 45

Figure 2.7 Single Load with Remote Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 2.8 Multiple Loads with Local Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 2.9 Multiple Loads with Remote Sensing . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 2.10 Connecting Remote Sense Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 3.1 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Figure 3.2 Series Operation of Multiple Supplies. . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 3.3 Parallel Operation of Multiple Supplies . . . . . . . . . . . . . . . . . . . . . . . 56

Figure 3.4 Split Supply Operation of Multiple Supplies . . . . . . . . . . . . . . . . . . . 57

Figure 3.5 Split Supply Operation of Multiple Supplies . . . . . . . . . . . . . . . . . . . 58

Figure 3.6 Shutdown Programming with Active Low Signal . . . . . . . . . . . . . . . 62

Figure 3.7 Shutdown Programming with Active High Signal . . . . . . . . . . . . . . . 62

Figure 4.1 Connecting Programming Sources to J2 Connector . . . . . . . . . . . . 70

Figure 4.2 Sample Analog Programming Configuration . . . . . . . . . . . . . . . . . . 70

Figure 4.3 0-5 Vdc Output Voltage and Current Monitoring. . . . . . . . . . . . . . . . 71

Figure 4.4 0-10 Vdc Output Voltage and Current Monitoring. . . . . . . . . . . . . . . 72

Figure 5.1 Front Panel Calibration Locations. . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Figure 5.2 Voltage and Current Programming Calibration Locations . . . . . . . . 78

Figure 5.3 Voltage Current and Monitor Calibration Locations . . . . . . . . . . . . . 80

Revision A xi

List of Figures

xii

Operating Manual for XHR Series Power Supply

List of Tables

Table 1.1 SW1 Switch Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 1.2 Electrical Specifications for 7.5 V to 40 V Models . . . . . . . . . . . . . . 24

Table 1.3 Electrical Specifications for 60 V to 600 V Models. . . . . . . . . . . . . . 25

Table 2.1 Basic Setup Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 2.2 Power Cords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Table 2.3 Current Carrying Capacity for Wiring . . . . . . . . . . . . . . . . . . . . . . . 39

Table 3.1 Shipped Configuration (Local Control Mode) . . . . . . . . . . . . . . . . . . 53

Table 3.2 Switch Settings for Shutdown Circuit Logic . . . . . . . . . . . . . . . . . . . 61

Table 3.3 Switch Settings for Over Temperature Recovery Options . . . . . . . . 63

Table 3.4 Quick Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Table 4.1 Power Supply Settings for Different Programming Sources . . . . . . 69

Table 4.2 Power Supply Settings for Remote Monitoring of Readback Signals71

xiii Operating Manual for XHR Series Power Supply

List of Tables

xiv

Operating Manual for XHR Series Power Supply

Section 1. Features and Specifications

Description

The 1000 watt DC output power supplies provide low noise, precisely regulated, variable DC output. Typically they are used for bench and automated test equipment (ATE) applications. Each unit includes over voltage protection and thermal shutdown as standard features. Universal AC input allows you to use line voltages globally without resetting switches or adding options. Built-in power factor correction gives you full output power from low current/low voltage outlets, reduces power line interference, and allows you to meet international regulations.

You can select from several remote control choices for either analog or digital control. For analog control, choose from standard analog control or optional 4-channel isolated programming. Digital control options include RS-232 control or GPIB programming. You can use the power supply on your benchtop or rack mounted; each supply occupies less than 3-1/2 in. (2 U) of vertical space. Whether you are powering batteries, development circuits, and magnet coils or running ATE systems, the power supply provides the precision and power that you need.

Features and Options

• Models available with voltage ranges from 0-7.5 Vdc to 0-600 Vdc; current

ranges from 0-1.7 A to 0-130 A.

• Internal power factor correction allows operation from a standard 120 Vac, 15 A

outlet.

• Thermal shutdown, latching or auto reset.

• Front panel control of Over Voltage Protection (OVP).

• 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 set points. Front panel LED indicators for voltage and current mode operation, OVP, remote programming mode, and shutdown.

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

current or voltage.

Revision A 15

Features and Specifications

Front Panel Controls

• 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 computer control for complete remote

programming and readback capability.

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 29

• “Functional Tests” on page 37

• “Local Operation” on page 51

16 Operating Manual for XHR Series Power Supply

Features and Specifications

Front Panel Controls

Shutdown LED (S/D) (See page 61 for more information.)

OVP Shutdown

LED (OVP)

Local Voltage and Current

Limit Setting Preview Switch

(V/I CHECK)

(See page 37.)

OVP Set Potentiometer

(OVP SET)

(See page 59.)

OVP Setting Preview Switch

(OVP CHECK)

AC Power Switch

ADR SRQ ERR POL FLT

30 AMP MAXIMUM

Standby Switch (STANDBY) (See page 61.)

Remote Programming LED (REM) (See page 67.)

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

Over Temperature Protection Shutdown LED (OTP) (See page 63.)

AC Fail LED (ACF)

Voltage Meter

Current Meter

(For units with digital programming

Option Board LEDs

Binding Posts

Output Voltage Control Knob

Output Current Limit Control Knob

interface installed.)

Current Mode LED

Binding Post Overload

Voltage Mode LED

LED (OL)

Figure 1.1 Power Supply Front Panel

(For all models.)

Revision A 17

Features and Specifications

Rear Panel Connectors and Switch

The output terminals for the low voltage models (7.5 V to 40 V) are bus bars. The high voltage models (60 V to 600 V) use a wire clamp connector. See Figure 1.2 and

Figure 1.3 to identify the switches and connectors on the rear panel.

Use the SW1 Programming, Monitoring, and Shutdown Select switch and the J2 Programming, Monitoring, and Sense connector to choose among several remote programming and monitoring options. See the following sections for more information about remote programming:

• “SW1 Programming Switch” on page 19

• “J2 Programming Connector” on page 20

• Section 4. Remote Operation

Rear Panel

Illustrations

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

Local Sense Wires (See page 48.)

SW1 Programming, Monitoring, and Shutdown Select Switch (See page 19.)

Blank Subplate (Replaced if digital programming interface installed.)

100/120/200/240V 50/60 HZ 1300VA

Negative Output (Return) Bus Bar

Positive Output Bus Bar (See page 39.)

Fan Exhaust Vents (Do not block.)

Ground Screw

AC Input Connector (See page 36.)

Figure 1.2 Rear Panel with Bus Bar

(For 7.5 V to 40 V models.)

18 Operating Manual for XHR Series Power Supply

Features and Specifications

Rear Panel Connectors and Switch

100/120/200/240V 50/60 HZ 1300VA

SW1

Programming

Switch

Local Sense Wires (See page 48.)

DC Output and Local Sense Connector (See page 39 for more information.)

Figure 1.3 Rear Panel with High Voltage Output Connector

(For 60 V to 600 V models.)

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

• Output voltage and current limit programming scales

• Output voltage and current monitor scales

• Remote shutdown circuit logic

• Resistive programming of output voltage or current limit

• Over temperature shutdown mode

The power supply is shipped with the SW1 switch set in the default operating configuration, as illustrated in Figure 1.4.

Figure 1.4 SW1 Programming Switch

(Shown in its default configuration.)

Revision A 19

Features and Specifications

Rear Panel Connectors and Switch

See Table 1.1 for a list of the functions assigned to each SW1 switch.

Table 1.1 SW1 Switch Functions

Switch Function OFF (Open)

SW1-1 1 mA current source for resistive

SW1-2 1 mA current source for resistive

SW1-3 Output voltage programming source

SW1-4 Output current limit programming

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

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

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

SW1-8 Over temperature shutdown reset

1. Factory defaults underlined.

programming of output voltage.

programming of output current limit.

range select.

source range select.

mode select.

Voltage source programming

0-5 V

Auto reset

ON (Closed)

Resistive programming

0-10 V

Latch OFF

Programming

Connector

Resetting the Switches The rear panel is labelled with OFF at the top of the

switch and ON at the bottom. 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.

Before making any changes to the switch settings, disable the power supply output. Either turn OFF the supply, or place the supply in shutdown mode by pressing the front panel STANDBY button to its ON position. Once output is disabled, use any small, straight-bladed screwdriver to change the switch settings.

The J2 Programming, Monitoring, and Sense connector is a 12-terminal wire clamp connector located on the power supply’s rear panel. 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 2.5-15 V or TTL-compatible

signals

• remote sensing of output voltage

20 Operating Manual for XHR Series Power Supply

Features and Specifications

Rear Panel Connectors and Switch

See Figure 1.5 to identify the function of each of the 12 terminals on the J2 connector.

1 Return Sense (–SNS) 2 Positive Sense (+SNS) 3 Control Ground ( ) 4 Remote Output Voltage Programming Select (VRMT) 5 Remote Current Limit Programming Select (IRMT) 6 Program/Monitor Signal Return (PGM–) 7 Output Voltage Programming Input (VPGM) 8 Output Current Limit Programming Input (IPGM) 9 Output Voltage Monitor (VMON) 10 Output Current Monitor (IMON) 11 Shutdown Input (S/D+) 12 Shutdown Signal Return (S/D–)

Figure 1.5 J2 Programming Connector

Making J2 Connections

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.

CAUTION

Do not attempt to bias the Program/monitor signal return (J2-6) relative to the power supply output return, as they are connected internally. Use the Isolated Programming (ISOL) option for control from programming sources at potentials differing from the supply output return.

Wire Clamp Connector Screw

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.

Revision A 21

Features and Specifications

Rear Panel Connectors and Switch

Wiring

WARNING

There is a potential shock hazard at the output and J2 terminals 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, 1.7 A model power supply

For lowest noise performance, make connections to the J2 connector with either

individually or group shielded 18-22 AWG (0.3-0.8 mm

) wire. Maintain the shield to within 1.5in. (40 mm) of the end of each wire. Strip 0.26.in (6.5 mm) of insulation, insert into the correct terminal, and tighten the wire clamp. You must ground the shield(s) to the power supply chassis with a connection less than 1.5.in (40 mm) long.

22 Operating Manual for XHR Series Power Supply

Specifications

Features and Specifications

Specifications

Electrical

Specifications

Specifications are warranted over a temperature range of 0 to 40 °C with default local sensing.

The tables on the following pages post maximum values for model-dependent specifications.

Specifications which are different due to measurements being taken at the front panel binding posts are identified, where they occur, in the tables.

Specifications are subject to change without notice.

Revision A 23

Features and Specifications

Specifications

Table 1. 2 Electrical Specifications for 7.5 V to 40 V Models

Models 7.5-130 20-50 33-33 40-25

Output Ratings:

Output Voltage Output Current Output Power

0-7.5 V 0-130 A 975 W

0-20 V 0-50 A 1000 W

0-33 V 0-33 A 1089 W

0-40 V 0-25 A 1000 W

At the front panel binding posts:

Output Current Output Power

Line Regulation:

Voltage (0.01% of Vmax + 2 mV) Current (0.01% of Imax + 1 mA)

Load Regulation:

Voltage (0.01% of Vmax + 2 mV) Current (0.05% of Imax + 1 mA)

0-30 A 225 W

3mV 14 mA

3mV 66 mA

0-30 A 600 W

4mV 6mA

4mV 26 mA

0-30A 990 W

5mV

4.3 mA

5mV 18 mA

8mV

2.8 mA

6mV 14 mA

At the front panel binding posts:

Voltage

650 mV

500 mV

Meter Accuracy:

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

0.09 V

1.4 A

0.3 V

0.6 A

0.43 V

0.43 A

0.5 V

0.35 A

Output Noise and Ripple (V):

rms p-p (0-20 MHz)

10 mV 70 mV

7.5 mV 75 mV

At the front panel binding posts:

p-p (0-20 MHz)

Drift (8 hours):

Voltage (0.05% of Vmax) Current (0.1% of Imax)

Temperature Coefficient:

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

Maximum Remote Sense

Line Drop Compensation

250 mV

3.75 mV 130 mA

1.5 mV 39 mA

250 mV

10 mV 50 mA

4mV 15 mA

350 mV

16.5 mV 33 mA

6.6 mV

9.9 mA

350 mV

20 mV 25 mA

8mV

7.5 mA

3 V/line 5 V/line 5 V/line 5 V/line

OVP Adjustment Range:

(5% to 110% of Vmax) 0.375-8.25 V 1-22 V 1.65-36.3 V 2-44 V

Efficiency

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

2. For 0-100% load variation, with constant nominal line voltage. Measured at the rear panel output connector unless stated otherwise.

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

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

5. Line drop is subtracted from total voltage available at supply output.

6. Typical efficiency at 115 Vac input and rated output power.

81% 83% 83% 83%

24 Operating Manual for XHR Series Power Supply

Features and Specifications

Specifications

Table 1.3 Electrical Specifications for 60 V to 600 V Models

Models 60-18 100-10 150-7 300-3.5 600-1.7

Output Ratings:

Output Voltage Output Current Output Power

Line Regulation:

Voltage (0.01% of Vmax + 2 mV) Current (0.01% of Imax + 1 mA)

Load Regulation:

Voltage (0.01% of Vmax + 2 mV) Current (0.05% of Imax + 1 mA)

0-60 V 0-18 A 1080 W

8mV

2.8 mA

8mV 10 mA

0-100 V 0-10 A 1000 W

12 mV 2mA

12 mV 6mA

0-150 V 0-7 A 1050 W

17 mV

1.7 mA

17 mV

4.5 mA

0-300 V 0-3.5 A 1050 W

32 mV

1.3 mA

32 mV 3mA

0-600 V

0-1.7 A

1020 W

62 mV

1.2 mA

62 mV 2mA

At the front panel binding posts:

Voltage

400 mV

300 mV

200 mV

100 mV

62 mV

Meter Accuracy:

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

0.7 V

0.19 A

1.1 V

0.11 A

1.6 V

0.08 A

0.05 A

0.03 A

Output Noise and Ripple (V):

rms p-p (0-20MHz)

10 mV 75 mV

10 mV 100 mV

20 mV 150 mV

30 mV 250 mV

120 mV 500 mV

At the front panel binding posts:

p-p (0-20MHz)

Drift (8 hours):

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

Temperature Coefficient:

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

Maximum Remote Sense

Line Drop Compensation

400 mV

30 mV 18 mA

12 mV

5.4 mA

400 mV

50 mV 10 mA

20 mV 3mA

450 mV

75 mV 7mA

30 mV

2.1 mA

500 mV

150 mV

3.5 mA

60 mV

1.1 mA

700 mV

300 mV

1.7 mA

120 mV

0.48 mA

5 V/line 5 V/line 5 V/line 5 V/line 5 V/line

OVP Adjustment Range

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

Efficiency

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

2. For 0-100% load variation, with constant nominal line voltage. Measured at the rear panel output connector unless stated otherwise.

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

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

5. Line drop is subtracted from total voltage available at supply output.

6. Typical efficiency at 115 Vac input and rated output power.

84% 84% 85% 85% 85%

Revision A 25

Features and Specifications

Additional Electrical Specifications

Voltage Mode Transient Response (Time for the output voltage to recover within 0.5% of its previous level after a step change in load current of up to 50% of the rated output.)

Time delay from power on until output stable

Input Conditions

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

Maximum AC Input Rating 1300 VA

Operational AC Input Voltage Range

Maximum Input Current 13 A maximum at 100 Vac,

Input Frequency Range 47

Power Factor 0.99 minimum for full load and 120 Vac

1ms

4s maximum

85-250 Vac; power factor corrected. Derate maximum output power to 900 W for AC input less than 95 V.

11 A maximum at 120 Vac, 6 A maximum at 220 Vac.

–63 Hz

input

26 Operating Manual for XHR Series Power Supply

Electrical Characteristics

Switching Frequency 7.5 V to 300 V models:

Output Hold-up Time Greater than 10 ms with interruption of AC

Features and Specifications

Electrical Characteristics

nominal 125 kHz (250 kHz output ripple) 600 V model nominal 62.5 kHz (125 kHz output ripple)

line, for nominal AC input and full load.

Maximum Voltage Differential from output to safety ground

Isolation Voltage Input to output: 1350 Vac

Remote Programming and Monitoring

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

Remote Analog Programming (Full Scale Input)

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

±600 Vdc

selectable logic. Input impedance: 1 k (in series with one diode drop).

Voltage and current programming inputs (source must be isolated): 0-5 k, 0-10 k resistances; 0-5 V (default), 0-10 V voltage sources; Input impedance (V and I): approximately 475 k.

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

Remote Programming and Monitoring Accuracy

Maximum Remote Sense Line Drop Compensation.

must be deducted from the supply’s maximum output voltage.)

(Line drop

Isolated Program and Readback (V & I) (Optional)

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

7.5 V models: 3 V/line. 20 V to 600 V models: 5 V/line.

0-5 V (ISOL interface). Input impedance: 200 k. Output impedance: 21 Ω

Digital Control (Optional) RS-232, GPIB or GPIB-M (multichannel)

Revision A 27

Features and Specifications

Environmental Specifications

Operating Ambient Temperature 0 to 40 °C.

Storage Temperature Range – 40 ° to 85 °C

Humidity Range Up to 80% RH, non-condensing

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

Installation Category II

Pollution Degree 2

Approvals

Units marked with c(CSA)us are CSA certified to: Canadian safety standard CAN/CSA C22.2 No. 61010.1-92 and USA safety standard UL 61010B-1.

Units marked with CE meet: EMC Directive (standards EN50081-2 and EN50082-1) and Low Voltage Directive (safety standard IEC 61010:1990 +A.1:1992 +A.2:1995).

Meets FCC part 15 Class A limits for radio emissions.

Meets Canadian EMC standard ICES-001, Class A limits.

28 Operating Manual for XHR Series Power Supply

Mechanical Specifications

Features and Specifications

Mechanical Specifications

Front Panel Voltage and Current

10-turn voltage and current potentiometers

Control

Front Panel Voltage Control

0.02% of maximum voltage

Resolution

Front Panel Voltage and Current Meters

3.5-digit numeric LED displays (for accuracy specifications, see Table 1.2 and Table 1.3)

AC Input Connector Type IEC 320 Connector, appropriate power cord

for destination country.

Front Panel Output 5-way binding posts:

maximum current limit 30 A

OVP Control Screwdriver-set potentiometer on front panel

Input Fuses 20 A, 250 V, 5 x 20 mm slow fuses,

location: A5 PCB, F321, 325;

0.005 A, 250 V, 5 x 20 mm fast fuse, location: A3 PCB, F1.

Main Output Connector 7.5 V to 40 V models: nickel-plated copper

bus bars; 60 V to 600 V models: 4-terminal wire clamp connector for DC output and local sense.

Analog Programming, Monitoring,

12-terminal wire clamp connector

and Sense Connector (2-piece)

Chassis Ground Chassis ground screw 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 Optional rack mount pan. (RM3-XHR)

Size (one unit) 87.0 mm H x 214.6 mm W x 472.2 mm D

(3.425in. H x 8.45in. W x 18.59in. D)

Weight (one unit) Approximately 6.4 kg (14 lb.)

Revision A 29

Features and Specifications

Dimensions

18.78 in. (477 mm)

15.85 in. (403 mm)

16.18 in. (411 mm)

8.45 in. (215 mm)

3.43 in. (87 mm)

Figure 1.6 Dimensional Drawings

(Dimensions given are nominal.)

3.14 in. (79 mm)

30 Operating Manual for XHR Series Power Supply

Section 2. Installation

Basic Setup Procedure

See Tab l e 2. 1 for a summary of the basic setup procedure and an overall view of the information 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 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); ensure adequate ventilation.

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

4 Test Perform functional tests for voltage

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

5 Load Connect the load. “Load Connection” on

6 Sensing Connect sensing lines. “Local and Remote

“Initial Inspection” on page 32

“Location, Mounting, and Ventilation” on page 35

page 36

“Functional Tests” on page 37

page 39

Sensing” on page 48

Revision A 31

Installation

Inspection, Cleaning, and Packing

Initial

Inspection

Periodic

Cleaning

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

1. Ensure that each package contains the power supply and an AC input cord.

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

3. If you suspect internal damage, have a service technician check the unit.

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

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.

32 Operating Manual for XHR 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 34, 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.

Revision A 33

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 Specifications” on

page 28.

POWER SUPPLY

Model Number: _______________________

Serial Number: _______________________

FRAGILE — ELECTRONIC EQUIPMENT

Figure 2.1 Shipping or Storage Carton Label

34 Operating Manual for XHR Series Power Supply

Location, Mounting, and Ventilation

Rack

Mounting

CAUTION

Ensure that any rack mounting screws do not extend more than 1/4in. (6.3 mm) into the base of the unit.

The rack mount kit allows you to mount two units side by side in a standard 19in. (483 mm) rack space.

1. Install commercially available rack slides, if used. Follow the manufacturer’s

instructions.

2. Remove the four (4) rubber feet from the bottom of each power supply.

3. Place the power supply (or supplies) into the rack mount pan (option

RM3-XHR).

4. Screw four (4) #6-32 x ¼in. flat head, rack mounting screws through the pan into

the threaded holes on the bottom of each power supply.

5. Install the rack mount pan in the rack.

Installation

Location, Mounting, and Ventilation

Ventilation Always ensure that cooling air reaches the ventilation inlet on the lower front of the

unit and that the fan can exhaust from the rear of the unit. Additional ventilation space at the top and bottom of the supply will further lower internal operating temperatures.

Check “Environmental Specifications” for the specified operating ambient temperature range for the power supply.

Revision A 35

Installation

AC Input Power

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

CAUTION

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

We warrant that the unit will perform to specification at AC input voltage range from 85 to 250 Vac. The power output derates to 900 W when the AC input voltage is below 95 V.

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.

AC Input Cord We ship the power supply with an AC input cord rated for your

location. See Table 2 .2 for the list of power cords that we ship. Use a power cord rated for your local voltage as long as it is within the supply’s input range as stated in “Input Conditions” on page 26. Any cord that you use requires a standard IEC 320 termination to mate with the power supply’s AC input connector. If you need a specific cord, call us.

Table 2.2 Power Cords

Location Power Cord Rating

North America 125 V, 13 A NA plug

Asia 125 V, 13 A NA plug

Great Britain 250 V, 10 A British plug

36 Operating Manual for XHR Series Power Supply

Functional Tests

The 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 1 mV/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. On

low voltage models, local sense jumpers connect terminal J2-2 on the J2 connector to the positive bus bar, and terminal J2-1 to the negative bus bar. On high-voltage models, terminal J2-2 connects to positive sense (+SNS) and terminal J2-1 to return sense (–SNS) on the wire clamp connector.

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

4. Connect the unit to an AC outlet.

5. Turn the front panel power switch to ON.

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

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

fully counter-clockwise.

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

polarity.

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

4. Slowly turn the voltage control clockwise and observe both the front panel

voltmeter and the DVM. The voltage mode LED will turn on.

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

accuracy of the internal voltmeter. The minimum control range is from zero to the maximum rated output for the particular power supply model.

6. Turn the front panel power switch to OFF.

Revision A 37

Installation

Functional Tests

Current Mode

Operation

Check

Front Panel

Function

Check

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

4. Connect a DC shunt across the output terminals on the rear panel.

5. Connect a DVM across the DC shunt. The DC shunt-DVM combination must be rated better than 0.5% accuracy.

6. Turn the power switch to ON.

7. Slowly turn the current control clockwise. The current mode LED will turn on.

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

9. Turn the power switch to OFF.

10. Disconnect the DVM and the shunt.

1. Turn the power switch to ON.

2. Set the 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 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.

3. Press the STANDBY switch to the IN position.

4. Press the OVP CHECK switch. 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. Make sure the voltage and current controls are turned all the way in the clockwise direction. Press the V/I CHECK switch and check that the voltmeter and ammeter display a minimum of the power supply model output ratings.

8. Turn the power switch to OFF.

38 Operating Manual for XHR 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 When connecting load wiring to the power supply, consider the following factors:

• Current capacity and voltage rating of the wire

• Maximum load wiring length for operation with sense lines

• Noise and impedance effects of the load lines

Insulation Rating

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, 1.7 A power supply.

Current Capacity

As a minimum requirement, 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. Tabl e 2.3 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 approximate 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 2.3 Current Carrying Capacity for Wiring

Wire Size (AWG)

18 4 8 36 16 6 6 61 14 10 4 97 12 16 2 155 10 21

Maximum Current (A)

Wire Size (AWG)

Maximum Current (A)

Revision A 39

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 2.2 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 the units (except 7.5 V models) will compensate for up to 5 V drop in each line. See also “Local and Remote Sensing” on page 48.

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 2.2 Maximum Load Wire Length for 1 V Line Drop

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

shielded pair wiring of shortest possible length for load wires. Connect the shield to the chassis using the ground screw on the rear panel. 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.

40 Operating Manual for XHR Series Power Supply

Making Load

Connections

Installation

Load Connection

WARNING

There is a potential 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.

Make load connections to the power supply at output connectors at the rear of the power supply, or at the binding posts on the front panel.

Binding Posts (All Models) The binding posts on the front panel have a built-in

current limiting function which will not allow more than 30 A to be drawn from the output on units with high output current capability. If the draw exceeds 30 A, the Binding Post Overload (OL) LED on the front panel lights up and the current draw is limited to 30 A. Once the load draw drops below 30 A, the OL LED goes out and normal operation resumes. Use remote sensing to improve load regulation at the binding posts. See “Specifications” on page 23 for any differences in specifications when operating with the load connected at the binding posts.

7.5 V to 40 V Models

CAUTION

Do not remove the A16 EMI filter board or the bus bar capacitor from the bus bars. Operating the power supply without the EMI filter board or the bus bar capacitor will impair its electrical performance.

CAUTION

When making connections to the bus bars, ensure 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.

The 7.5 V to 40 V models have output bus bars on the rear panel and come with a bus bar shield. A filter capacitor and the A16 EMI filter board are attached to the bus bars on the rear panel. Detach only the bus bar shield before making load or remote sense line connections. To detach the shield, remove the screws as shown in

Figure 2.3.

Revision A 41

Installation

Load Connection

A16 EMI Filter PCB

Bus Bar Capacitor

Figure 2.3 Bus Bar Shield

Shield

Flat Washer (3 places)

1/4in. Screw (2 places)

3/8in. Screw (1 place)

Inductive

Loads

Use the following protection methods only when using local sensing.

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 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.

42 Operating Manual for XHR Series Power Supply

Load Connection

Wire Terminal Lug (2 places)

Screw (2 places)

Lock Washer

Hex Nut (2 places)

(2 places)

Figure 2.4 Typical Load Connection Hardware

(For 7.5 V to 40 V models.)

To make load connections to a 7.5 V, 130 A power supply:

1. Install a connecting wire terminal lug to load wiring. See Figure 2.4.

Installation

2. Fasten wire terminal lugs to bus bars with 1/4in. x 1/2in. (M6 x 12 mm) screws,

1/4in. (M6) internal tooth lock washers, and hex nuts as shown.

Note:Bus bar hole sizes are: 2 of 0.257in. (6.50 mm) diameter (D); 1 of 0.191in. (4.83 mm) D; and 2 of 0.156in. (3.95 mm) D.

Revision A 43

Installation

Load Connection

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.

The output connector for the 60 V to 600 V models is a 4-terminal, wire clamp connector located on the rear panel. Two of the terminals are for local sense connections. See Figure 2.5.

To prepare and connect the load wiring:

1. Strip insulation 0.35in. (9 mm) at the end of the wires.

2. Loosen the terminal screw, insert the stripped wire into the terminal, and tighten the screw securely.

Load Wires

Output Connector

–

SNS

SNS +

Figure 2.5 Output Connector

(For 60 V to 600 V models.)

44 Operating Manual for XHR Series Power Supply

Installation

Load Connection

Connecting

Single Loads

Figure 2.6 and Figure 2.7 show recommended load and sensing connections for

single loads. Local sense lines shown are default J2 connections.

You do not need remote sensing for basic operation of your supply. However, if you wish to correct for any small drops in your load lines, then use this feature. Refer to

Using Remote Sensing for more information.

Figure 2.6 Single Load with Local Sensing (Default)

Figure 2.7 Single Load with Remote Sensing

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.

Revision A 45

Installation

Load Connection

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 2.8 and Figure 2.9 show recommended load and sensing connections for

multiple loads. Local sense lines shown are default J2 connections. Refer to Using

Remote Sensing for how to ground the sense line shield.

Figure 2.8 Multiple Loads with Local Sensing

46 Operating Manual for XHR Series Power Supply

Figure 2.9 Multiple Loads with Remote Sensing

Installation

Load Connection

Revision A 47

Installation

Local and Remote Sensing

Use connections on the rear panel J2 connector to set up the power supply for local or remote sensing of output voltage.

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, 1.7 A power supply. Ensure that connections at the load end are shielded to prevent contact with hazardous voltages.

Local

Sensing

Using

Remote

Sensing

We ship the power supply with wire jumpers installed for local sensing of the output. See “Rear Panel Illustrations” on page 18. With local sensing, the output voltage is regulated at the output terminals. This method does not compensate for voltage losses in the load lines, so it is recommended only for low current applications or for applications in which load regulation is not essential.

Note: 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.

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

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

Note: 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 the power supply’s chassis.

48 Operating Manual for XHR Series Power Supply

Installation

Local and Remote Sensing

Use remote sensing during voltage mode operation to shift the power supply’s regulation point from its 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 would otherwise degrade the regulation of the supply. Line drop is subtracted from the total voltage available at the output. You can also use remote sensing to improve load regulation at the front panel binding posts.

To connect remote sense lines:

1. Turn the power supply OFF.

2. Remove the local sense jumper connecting J2 terminal 2 to the positive bus bar

(or positive sense on wire clamp output connector). Remove the local sense jumper connecting J2 terminal 1 to the negative bus bar (or negative or return sense on wire clamp output connector).

3. Connect the positive remote sense lead to J2 terminal 2 (positive sense) and the

negative lead to J2 terminal 1 (return sense). Use shielded pair wiring of 24 AWG or larger for remote sense lines. Ensure the mating J2 connector is plugged securely into the connector at the rear panel. 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 output terminal, or to the power supply’s chassis. See Figure 2.10 for an example.

5. Turn the power supply ON.

Notes:

• 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 power supply 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 function, but supply regulation will be degraded and/or erratic, or the OVP circuit may activate.

Revision A 49

Installation

Local and Remote Sensing

Figure 2.10Connecting Remote Sense Lines

50 Operating Manual for XHR Series Power Supply

Section 3. Local Operation

Standard Operation

Once you have installed the power supply and as covered in Section 2. Installation, the power supply is ready to operate in local control mode (that is, operation at the front panel). The 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.

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

SET

Figure 3.1 provides a graphical representation of the relationships between these

variables.

Revision A 51

Local Operation

Standard Operation

Output

V SET

Voltage

Constant Voltage Mode Region

Constant Current Mode Region

I SET

RL > V

Crossover Point

Output Current

SET

Where:

= Load Resistance

= Output Voltage Setting

SET

= Output Current Setting

SET

Figure 3.1 Operating Modes

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

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.

52 Operating Manual for XHR Series Power Supply

Local Operation

Standard Operation

Shipped

Configuration

(Local Control

Mode)

Setting

Output

Voltage and

Current Limit

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

Table 3 .1 summarizes this configuration.

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: You can use the LOCAL button only when you have a digital programming interface installed.)

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

The over voltage protection (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.

Section 3

operation. See Section 4 for how to set up for remote analog programming.

See

covers front panel

“Local and Remote Sensing”

on page 48 for how to change from

local to remote sensing.

See

“Using Over Voltage Protection

(OVP)” on page 59 for how to

change the OVP setpoint.

See

“Over Temperature Protection

(OTP)” on page 63 for more

information about switch SW1-8 settings for OTP recovery.

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

(Local Control Mode)” on page 53. 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 power ON.

3. Press the STANDBY switch to its IN position to disable the power supply

output.

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.

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.

Revision A 53

Local Operation

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 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 power supply’s negative output. Do not connect remote programming ground lines (J2 terminals 3 and 6) to the supply’s positive output.

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.

54 Operating Manual for XHR Series Power Supply

Configuring

Multiple

Supplies for

Series

Operation

Local Operation

Using Multiple Supplies

CAUTION

Do not use remote sensing during series operation.

CAUTION

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

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.

Figure 3.2 Series Operation of Multiple Supplies

Revision A 55

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 set points to maximum. 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 20 V, 50 A power supplies operating in parallel with a 75 A load, one supply operates in constant current mode supplying 50 A and the other supply operates in voltage mode supplying the remaining 25 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

(Local sense lines shown are default J2 connections.)

56 Operating Manual for XHR Series Power Supply

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.

Two positive voltages

Figure 3.4 Split Supply Operation of Multiple Supplies

(Local sense lines shown are default J2 connections.)

Revision A 57

Local Operation

Using Multiple Supplies

Positive-negative Supply

To obtain a positive-negative supply, connect the negative output terminal of one supply to the positive output terminal of the second supply. See Figure 3.5. The positive output terminal of the first supply now provides a positive voltage relative to the common connection. The negative output terminal of the second supply provides the 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.

CAUTION

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

Positive-Negative Supply

Figure 3.5 Split Supply Operation of Multiple Supplies

(Local sense lines shown are default J2 connections.)

58 Operating Manual for XHR 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 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 potentiometer on the front panel or via one of the optional GPIB or RS-232 programming interfaces.

Notes:

• 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 voltage to any voltage lower than the desired trip level.

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

4. Press the OVP CHECK switch to observe 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. Release 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 will turn on when the OVP circuit activates.

Revision A 59

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 S/D (Shutdown) LED on the front panel will turn 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 power switch, wait until the front panel displays go out, then turn the supply back ON again.

60 Operating Manual for XHR 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 entire 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 connector, using a 2.5 V to 15 V signal or a transistor-transistor logic (TTL) compatible input. 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-button switch located on the power supply's front panel. Pushing the switch to its IN position activates the Shutdown circuit. The output voltage and current drop to zero and the S/D (shutdown) LED turns on. Pushing the switch to its OUT position returns the power supply to normal operation.

The Shutdown circuit accepts a 2.5 V to 15 V signal to disable or enable the power supply’s 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 Section 1 for more information about making J2 connector or SW1 switch changes.

To activate the Shutdown function:

1. Turn the power supply OFF.

2. Connect the signal source to J2 connector terminal 11 (Shutdown Input/positive)

and terminal 12 (Shutdown Return).

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

4. Turn on the power supply.

The power supply will operate as described in Tab le 3 .2 according to the logic you select and the level of the input signal you provide. The S/D LED on the front panel turns on when the Shutdown circuit is activated.

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)

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

Note:If switch SW1-7 is set to ON but there is no signal applied, the S/D LED turns on and the power supply will not provide an output until the HIGH signal level is applied.

Revision A 61

Local Operation

Using the Shutdown Function

Shutdown Signal Source: High = Output OFF Low = Output ON

Figure 3.6 Shutdown Programming with Active Low Signal

Shutdown Signal Source: High = Output ON Low = Output OFF

Figure 3.7 Shutdown Programming with Active High Signal

SW1-7: OFF (OPEN)

SW1-7: ON (CLOSED)

62 Operating Manual for XHR Series Power Supply

Over Temperature Protection (OTP)

The over temperature protection circuit shuts down the power supply’s output when the power supply exceeds internal temperature limits. When an OTP shutdown occurs, the OTP LED on the front panel turns on. You can select the way that the power supply recovers from an over temperature shutdown by setting the SW1-8 switch on the rear panel. Table 3 .3 shows the possible switch settings.

Table 3.3 Switch Settings for Over Temperature Recovery Options

Switch SW1-8

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

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

OTP Shutdown Selection

Local Operation

Over Temperature Protection (OTP)

Description

the over temperature condition no longer exists.

stays OFF until you cycle its input power using the front panel AC power switch.

Revision A 63

Local Operation

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.

Emergency

Shutdown

Unusual or

Erratic

Operation

Troubleshooting

for Operators

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 37.

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

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

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

Use the checks in Table 3.4, “Quick Diagnostics” to ensure that the power supply is configured and connected for normal operation. If you require 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

64 Operating Manual for XHR Series Power Supply

Local Operation

User Diagnostics

Table 3.4 Quick Diagnostics

Symptom Check Further Checks and Corrections

No output and the display is blank.

No output but the display turns on.

Is input voltage in the specified range? Connect to appropriate voltage source.

Power switch ON? Turn on power.

Internal circuit. See your service technician.

SW1 switch settings correct? (For when using analog programming.)

OVP LED turned on? See

Front panel S/D LED turned on? See

See

“Remote Analog Programming of Output Voltage and Current Limit” on page 67

“Using Over Voltage Protection (OVP)” on page 59

“Using the Shutdown Function” on

page 61.

OTP LED turned on? See

“Over Temperature Protection (OTP)” on page 63.

Current limit set to zero? See

Voltage control set to zero? See

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

“Standard Operation” on page 51.

analog programming source. (See

“Remote Analog Programming of Output Voltage and Current Limit” on page 67.) If not, refer to your digital

interface manual.

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

range.

Internal circuit. See your service technician.

No output and display blinks dimly.

Output not adjustable.

Internal circuit. See your service technician.

Is unit in current limit mode? (Red Current Mode LED turned on).

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

“Operating Modes and

Automatic Crossover” on page 51

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

If using remote analog control, check your analog programming source. (See

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

.) If not, refer to your digital

Is unit at maximum voltage or current limit?

page 67

interface manual.

Reduce load for lower voltage or current requirement.

Revision A 65

Local Operation

User Diagnostics

Symptom Check Further Checks and Corrections

Output voltage fluctuating or regulation poor.

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

load. See

Is input voltage within specified range? Connect to appropriate AC voltage

source.

Are sense lines connected? See

“Standard Operation” on page

“Load Connection” on page 39 and “Local and Remote Sensing” on page 48

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

Internal circuit. See your service technician.

Output oscillating. Check for unstable or oscillating

programming source.

Peak current drawn by load exceeds current limit setting of supply (motors, switchmode loads).

Internal circuit. See your service technician.

Stabilize programming source connected to J2.

Add external supply capacitance to supply output.

66 Operating Manual for XHR Series Power Supply

Section 4. Remote Operation

Remote Analog Programming of Output Voltage and Current Limit

CAUTION

Ensure that you make connections to the J2 connector exactly as shown in each procedure in this section. Incorrect J2 jumper connections may damage the supply.

Remote analog programming allows control of the output voltage and/or current limit to shift from local operation at the front panel 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 switches and make connections to a connector on the rear panel. See Section 1. Features and

Specifications for information about using the rear panel switch and connector.

Remote

Programming

Options

Remote analog programming allows control of both output voltage and the current limit. You have a choice of programming scales depending on your choice of voltage source and resistance. You can choose a voltage source of 0-5 V or 0-10 V or a current source using a resistance of 0-5 k or 0-10 k. You can use the programming scales in any combination to suit your needs.

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

is an internal board 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. The ISOL interface is described in “Using the Isolated Programming

(ISOL) Interface Option” on page 72.

Remote Digital Programming You can operate the power supply from a

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

Revision A 67

Remote Operation

Remote Analog Programming of Output Voltage and Current Limit

Remote

Analog

Programming

Procedure

CAUTION

The remote programming inputs are internally referenced to the supply's negative output. Do not connect control ground (rear panel J2 connector terminal J2-3 or J2-6) to the supply’s positive output.

1. Turn the power supply OFF.

2. Using Ta b le 4. 1, set switches SW1-1, SW1-2, SW1-3, and SW1-4 according to the selected programming sources. See Notes at the end of this procedure for more information about switch settings.

3. Install any J2 connector jumpers as indicated in Table 4 .1.

4. Connect the programming source(s) to the rear panel J2 connector as shown in

Figure 4.1, observing the correct polarity for voltage sources.

5. Set the programming sources to the desired levels and turn the power supply ON. The REM LED turns on.

6. Adjust the external programming source to change the power supply’s output.

Notes:

• Switches SW-1 to SW-4 can be set to their defaults (all open) unless otherwise

specified in Table 4 .1. See SW1 Programming Switch for default settings. Switches SW1-5, SW1-6, SW1-7, and SW1-8 are not required for remote programming. They can remain at the settings you have selected for your application.

• 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 Calibrating for Programming Accuracy.

• 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.

68 Operating Manual for XHR Series Power Supply

Remote Operation

Remote Analog Programming of Output Voltage and Current Limit

Table 4.1 Power Supply Settings for Different Programming Sources

Output Voltage Programming

Source

0-5 Vdc

0-10 Vdc

0-5 k Resistor

0-10 k Resistor

None (Front Panel Control)

Output Current Limit Programming Source

0-5 Vdc 0-10 Vdc 0-5 k Resistor 0-10 k Resistor

SW1: use default settings. J2: jumper

SW1: set 4 closed. J2: jumper 3 to 4, 3 to 5.

SW1: set 2 closed. J2 Jumper 3 to 4, 3 to 5.

SW1: set 2 and 4 closed. J2: jumper 3 to 4, 3 to 5.

3 to 4, 3 to 5.

SW1: set 3 closed: J2: jumper 3 to 4, 3 to 5.

SW1: set 3 and 4 closed. J2: jumper 3 to 4, 3 to 5.

SW1: set 2 and 3 closed. J2: jumper 3 to 4, 3 to 5.

SW1: set 2, 3, and 4 closed. J2: jumper 3 to 4, 3 to 5.

SW1: set 1 closed. J2: jumper 3 to 4, 3 to 5.

SW1: set 1 and 4 closed. J2: jumper 3 to 4, 3 to 5.

SW1: set 1 and 2 closed. J2: jumper 3 to 4, 3 to 5.

SW1: set 1, 2, and 4 closed. J2: jumper 3 to 4, 3 to 5.

SW1: set 1 and 3 closed. J2: jumper 3 to 4, 3 to 5.

SW1: use default settings. J2: jumper

SW1: set 1, 3, and 4 closed. J2: jumper 3 to 4, 3 to 5.

SW1: set 4 closed. J2: jumper 3 to 5.

SW1: set 1, 2, and 3 closed. J2: jumper 3 to 4, 3 to 5.

SW1: set 2 closed. J2: jumper 3 to 5.

SW1: set 1, 2, 3, and 4 closed. J2: jumper 3 to 4, 3 to 5.

SW1: set 2 and 4 closed. J2: jumper 3 to 5.

3 to 5.

None (Front Panel Control)

SW1: use default settings. J2: jumper 3 to 4.

SW1: set 3 closed. J2: jumper 3 to 4.

SW1: set 1 closed. J2: jumper 3 to 4.

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

SW1: use default settings. J2: no jumpers

Revision A 69

Remote Operation

Remote Analog Programming of Output Voltage and Current Limit

Figure 4.1 Connecting Programming Sources to J2 Connector

Sample

Configuration

The sample configuration in Figure 4.2 shows the required settings and connections for:

• 0-10 Vdc programming of the output voltage

• local control (front panel control) of the output current limit

SW1-3: ON (CLOSED) J2 Jumper: 3 to 4

Figure 4.2 Sample Analog Programming Configuration

70 Operating Manual for XHR Series Power Supply

Remote Monitoring of Output Voltage and Current

Remote Operation

Readback

Signals

The J2 connector on the rear panel provides access to calibrated readback signals for remote monitoring of the output voltage and current. Use rear panel switches SW1-5 and SW1-6 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 .2 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 J2 connector terminal 1 or to the chassis. See Figure 4.3 and Figure 4.4 for sample configurations using remote monitoring.

Table 4.2 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 (+)

J2-9 J2-6 SW1-5 ON (CLOSED)

J2-9 J2-6 SW1-5 OFF (OPEN)

J2-10 J2-6 SW1-6 ON (CLOSED)

J2-10 J2-6 SW1-6 OFF (OPEN)

J2 Connection Return (-)

Switch SW1 Setting

Note:Check the readback accuracy any time you reset the SW1 switch. Access offset and range adjustment for the readback signals through the cover of the unit. See “Calibrating for Readback Accuracy” on page 80.

SW1-5 and SW1-6: ON (CLOSED)

Figure 4.3 0-5 Vdc Output Voltage and Current Monitoring

Revision A 71

Remote Operation

Using the Isolated Programming (ISOL) Interface Option

Figure 4.4 0-10 Vdc Output Voltage and Current Monitoring

Using the Isolated Programming (ISOL) Interface Option

With the 4-channel Isolated (ISOL) Programming Interface installed, you can control and monitor the power supply’s output voltage and current limit using 0-5 V analog signals that are not referenced to the power supply’s internal ground. The isolation amplifiers used are rated to 1000 Vdc. With ISOL installed, the power supply will no longer support resistive programming, or 0-10 V programming or readback. You can still control any non-programmed function (either voltage or current limit) at the power supply’s front panel.

SW1-5 and SW1-6 OFF (OPEN)

ISOL

Specifications

Nominal Gain 1 V/V typical Gain vs. Temperature ±10 ppm/°C typical Non Linearity ±0.016% FSR typical, ±0.020%

FSR maximum

Offset Voltage ±20 mV typical, ±50 mV

maximum Input vs. Temperature ±200 mV/°C typical Input Voltage Range 0-5 V Input Impedance 200 k typical

Readback Voltage Range 0-5 V Readback Current Drive ±15 mA typical, ±5 mA minimum Readback Load Capacitance 0.1 mF typical

72 Operating Manual for XHR Series Power Supply

ISOL Setup

and

Operating

Instructions

Remote Operation

Using the Isolated Programming (ISOL) Interface Option

CAUTION

In order to maintain isolation, do not connect either J2 connector terminal 3 (control ground) or the power supply return to J2 terminal 6 (program/monitor signal return).

1. Ensure that the rear panel SW1 switch is set to its default configuration as in

Figure 1.4 , on p. 19.

2. Connect the 0-5 V programming source to the J2 connector on the power supply’s rear panel as described in Section 4. Remote Operation.

3. Once the connections are made, use the power supply with the ISOL interface installed as you would a power supply with a 0-5 Vdc programming source. The only differences are that the programming and monitoring sources are now isolated and that resistive and 0-10 V programming as well as 0-10 V monitoring are unavailable. All front panel functions are as usual.

ISOL

Calibration

Revision A 73

To calibrate a unit which has the ISOL interface installed, have the service technician follow the standard procedures in Section 5. Calibration.

Remote Operation

Using the Isolated Programming (ISOL) Interface Option

74 Operating Manual for XHR Series Power Supply

Section 5. Calibration

Calibration Setup

WARNING- HIGH ENERGY AND HIGH VOLTAGE

Exercise caution when using and servicing 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 primary 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.

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 test these units alone. Ensure that someone is present who can help

should an accident occur.

You will need the following equipment when calibrating your 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. Current rating for the

DC shunt and connecting wire must be at least 10% greater than the power supply’s output current rating. See also Table 2.3, “Current Carrying Capacity

for Wiring”.

• Non-conducting, straight-bladed screwdriver.

Revision A 75

Calibration

Front Panel Calibration

Front panel calibration includes voltmeter, ammeter, voltage and current preview and over voltage protection (OVP) setpoint and preview functions. Perform all procedures in the sequence give.

Additional

Setup

Make calibration adjustments using multiturn potentiometers accessed by removing the power supply’s cover.

1. Unfasten the cover and move it back one inch from the front to allow access to the calibration potentiometers on the A1 PCB. Refer to Figure 5.1 for the location of the pots.

2. Perform the following calibration procedures.

3. Once you are finished, turn off the power supply and replace the cover

Figure 5.1 Front Panel Calibration Locations

Voltm eter

Calibration

1. Connect the DVM to the output bus bars at a point close to the chassis. Turn the current control knob fully clockwise.

2. Increase the output voltage to show the maximum rated voltage on the external DVM. Adjust the voltmeter full scale adjust potentiometer (R50) until the front panel voltmeter reads the maximum rated output voltage. Check that the front panel voltage mode LED turns on.

76 Operating Manual for XHR Series Power Supply

Calibration

Front Panel Calibration

3. Press the front panel STANDBY switch to its IN position. Check that the output

voltage drops to 0V in less than 2 seconds. Check that the S/D LED turns on.

4. While holding the front panel V/I CHECK switch in, adjust the voltage check

calibration potentiometer (R53) until the front panel meter reads the maximum rated output.

5. Press the STANDBY switch again to its OUT position to resume normal power

supply operation and to reset the output.

Ammeter

Calibration

Over Voltage

Protection

(OVP)

Calibration

1. Connect the DVM across the output current shunt with the negative lead

connected to the power supply return side of the shunt. Turn the voltage control knob fully clockwise.

2. Turn on the load and adjust the load until the external DVM reads the maximum

rated output voltage.

3. Adjust the ammeter full scale adjust potentiometer (R51) until the front panel

ammeter reads the maximum rated output current.

4. While holding the front panel V/I CHECK switch in, adjust the current check

calibration potentiometer (R52) until the front panel ammeter reads the maximum rated output current.

5. Turn off the load.

1. Set the output voltage to the maximum rated output voltage.

2. Slowly turn the front panel OVP SET screw counter clockwise until the OVP

just fires. Check that the output voltage drops to 0V in less than 2 seconds. Check that the front panel OVP LED is on.

3. Lower the output voltage setting and press the front panel STANDBY switch

twice to reset the output.

4. Increase the output voltage slowly until the OVP circuit just fires. Observe the

voltage reading at firing point for future reference.

5. Press OVP CHECK, and adjust the OVP check calibration potentiometer (R54)

to match the output voltage setting observed when the OVP circuit fired.

6. Repeat the process to ensure that the OVP preview reading in within 1% of the

OVP fire point.

7. Turn the OVP SET screw fully clockwise.

Revision A 77

Calibration

Calibrating for Programming Accuracy

WARNING

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

The factory calibrates the offset and range of the voltage and current programming circuits to within 1% for the default 0-5 Vdc programming signals. You may need to recalibrate when you change SW1 switch settings to use 0-10 Vdc programming or when you switch back to 0-5 Vdc programming after previously calibrating for 0-10 Vdc programming.

Make calibration adjustments using multi-turn potentiometers, accessed through holes in the cover of the power supply. See Figure 5.2 for the location of each of the pots.

Figure 5.2 Voltage and Current Programming Calibration Locations

78 Operating Manual for XHR Series Power Supply

Calibration

Calibrating for Programming Accuracy

Voltage

Programming

Circuit

Calibration

Current

Programming

Circuit

Calibration

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

2. Connect the programming source between J2 terminals 7 (output voltage

programming input) and 6 (program/monitor signal return).

3. Connect the DVM to the power supply output.

4. Turn the power supply ON.

5. Apply 1% of program voltage.

6. Adjust the voltage program offset potentiometer (R72) until the DVM reads 1%

of the model-rated output voltage.

7. Apply 100% of program voltage.

8. Adjust the voltage program scale potentiometer (R96) until the DVM reads

100% of the model-rated output voltage.

Repeat this adjustment until output levels are within the product specifications as found in Section 1, or to the accuracy that your application requires.

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 6 (program/monitor signal return).

3. Connect the shunt and DVM across the power supply output. See note below.

4. Turn the power supply ON.

5. Apply 1% of program voltage.

6. Adjust the current program offset potentiometer (R75) until the DVM indicates

1% of the model-rated output current. See note below.

7. Apply 100% of program voltage.

8. Adjust the current program scale potentiometer (R98) until the DVM indicates

100% of the model-rated output current. See note below.

Repeat this adjustment until output levels are adjusted to power supply specifications as found in Section 1, or to the accuracy your application requires.

Notes:

• The DC shunt-DVM combination must be rated better than 0.5% accuracy.

• Calculate the required DVM reading using I = V/R, where I is the current, V is

the DVM reading, and R is the DC shunt resistance.

Revision A 79

Calibration

Calibrating for Readback Accuracy

WARNING

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

The factory calibrates the offset and range of the output voltage and current monitor circuits to within 1% for the default 0-5 Vdc scales. Recalibration may be necessary when you change SW1 switch settings to select the 0-10 Vdc scale or when you switch back to the 0-5 Vdc scale after previously calibrating for 0-10 Vdc operation.

Make calibration adjustments using multi-turn potentiometers, accessible through holes in the cover of the power supply. Refer to Figure 5.3 for the location of each of the pots.

Figure 5.3 Voltage Current and Monitor Calibration Locations

80 Operating Manual for XHR Series Power Supply

Calibration

Calibrating for Readback Accuracy

Output

Voltage

Monitor

Circuit

Calibration

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

2. Connect a DVM across the power supply output to read the output voltage.

3. Connect a second DVM to the rear panel J2 terminals 9 (output voltage monitor)

and 6 (program/monitor signal return). See notes below.

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 potentiometer (R78) until the monitor

DVM reads 1% of the readback scale. (50 mVdc for 0-5 Vdc readback or 100 mVdc for 0-10 Vdc readback.)

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

8. Adjust the output voltage monitor range potentiometer (R99) until the monitor

DVM reads 100% of the readback scale. (5 Vdc for 0-5 Vdc readback or 10 Vdc for 0-10 Vdc readback.)

Repeat this adjustment until the monitor signal is within the product specifications as found in Section 1, or to the accuracy that your application requires.

Notes:

• The recommended accuracy rating for the DVMs is four times better than your

desired readback accuracy.

• Depending on the readback accuracy required in your application, you may use

the front panel voltmeter in place of the meter used to monitor the output of the supply.

Revision A 81

Calibration

Calibrating for Readback Accuracy

Output

Current

Monitor

Circuit

Calibration

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

2. Connect the shunt and DVM across the power supply output to read the output current.

3. Connect a second DVM to the rear panel J2 terminals 10 (output current monitor) and 6 (program/monitor signal return). See notes below.

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

5. Set the supply output current to 1% of its model-rated output. See note below.

6. Adjust the output current monitor offset potentiometer (R81) 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 supply output current to the model-rated maximum output.

8. Adjust the output current monitor range potentiometer (R100) 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 adjustment until the monitor scale is within the product specifications as found in Section 1, or to the accuracy that your application requires.

Notes:

• The recommended accuracy of the DVM and DC shunt-DVM combination is

four times better than your desired readback accuracy. The recommended current ratings for the DC shunt and connecting wire is at least 10% greater than the power supply's output current rating.

• Depending on the readback accuracy required in your application, you may use

the front panel ammeter in place of the DC shunt-DVM combination.

• Calculate the required output current reading using I = V/R where I is the

current, V is the DVM reading, and R is the DC shunt resistance.

82 Operating Manual for XHR Series Power Supply

Xantrex Technology Inc.

8999 Nelson Way Burnaby, British Columbia Canada V5A 4B5

360 925 5097 Tel 360 925 5143 Fax 800 670 0707 Toll Free North America

prg.info@xantrex.com www.xantrex.com

TM-XROP-01XN

PRINTED IN CANADA

Xantrex XHR 7.5-130, XHR 20-50, XHR 33-33, XHR 40-25, XHR 60-18 User Guide

Specifications and Main Features

Frequently Asked Questions

User Manual