Argantix XDS 30-500, XDS 40-375, XDS 50-200, XDS 50-300, XDS 80-62 User And Programming Manual

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Revision L

February 2007

P/N 5005-981

XDS Series

DC Power Supply

User and Programming

Manual

Series II

TEL: +1 (858) 677-9040

FAX: +1 (858) 677-0940

Email: sales@argantix.com

Web Site: http://www.argantix.com

Advanced Test Equipment Rentals

www.atecorp.com 800-404-ATEC (2832)

User and Programming Manual

User and Programming Manual P/N 5005-981 DC Power Supplies Argantix

Specifications subject to change without notice.

XDS Series 2

User and Programming Manual

SAFETY SUMMARY

This power supply contains high voltage and current circuits that are potentially lethal. Because of its size and weight, electrical and mechanical stability must be ensured. The following safety guidelines must be followed when operating or servicing this equipment. These guidelines are not a substitute for vigilance and common sense. If this power supply is not used as specified in this manual, the protection provided by this equipment may be impaired. California Instruments assumes no liability for the customer's failure to comply with these requirements.

BEFORE APPLYING POWER

1. Check the units input rating on the type label and verify the correct voltage is applied to the unit (for example 208 V L-L, 3 Phase).

2. The chassis and cabinet of this power supply must be grounded to minimize shock hazard. A chassis ground is provided at the input terminal block. This is located at the back of the cabinet on the right hand side (looking at the back of the unit). The chassis ground must be connected to an electrical ground through an insulated wire (green/yellow) of sufficient gauge.

3. The XDS Series power supplies do not have internal AC mains disconnect. Instead, protection is provided by fuses. The on/off button only engages or disengages the bias supplies, it does not disconnect the AC mains to the unit. It is strongly recommended to use a suitably rated

circuit breaker or mains disconnect device with branch protection rating per local electrical codes between point of connection and the XDS unit AC input.

FUSES

Use only fuses of the specified current, voltage, and protection speed. DO NOT OPERATE IN A VOLATILE ATMOSPHERE

Do not operate the power supply in the presence of flammable gases or fumes. This product is designed to operate in a controlled environment. Do not expose to rain or snow.

DO NOT TOUCH ENERGIZED CIRCUITS Disconnect the power cable before servicing this equipment. Even with the power cable disconnected, high voltage can still exist on some circuits. Discharge these voltages before servicing. Allow at least 30 minutes for all internal circuits to discharge before removing the top cover. Only qualified service personnel may remove covers, replace components or make adjustments.

DO NOT SERVICE ALONE Do not remove covers, replace components, or make adjustments unless another person, who can administer first aid, is present. DO NOT EXCEED INPUT RATINGS Do not exceed the rated input voltage or frequency. Additional hazards may be introduced because of component failure or improper operation. DO NOT MODIFY INSTRUMENT OR SUBSTITUTE PARTS Do not modify this instrument or substitute parts. Additional hazards may be introduced because of component failure or improper operation. MOVING THE POWER SUPPLY When moving the power supply, observe the following:

1. Remove all AC power to unit.

2. Note that the handles are provided to pull instrument out of 19" instru men t cab in et and are

not designed to support the weight of the unit.

3. Use two people to prevent injury.

SURFACE STABILITY Operate the power supply only on a level surface.

XDS Series 3

User and Programming Manual

Electrical Safety Symbols Used in This Manual

4 XDS Series

User and Programming Manual

WARRANTY INFORMATION

CALIFORNIA INSTRUMENTS CORPORATION warrants each instrument manufactured by them to be free from defects in material and workmanship for a period of five years from the date of shipment to the original purchaser. Excepted from this warranty are fuses and batteries that carry the warranty of their original manufacturer where applicable. CALIFORNIA INSTRUMENTS will service, replace, or adjust any defective part or parts, free of charge, when the instrument is returned freight both ways prepaid, and when examination reveals that the fault has not occurred because of misuse, abnormal conditions of operation, user modification, or attempted user repair. Equipment repaired beyond the effective date of warranty or when abnormal usage has occurred will be charged at applicable rates. CALIFORNIA INSTRUMENTS will submit an estimate for such charges before commencing repair, if so requested.

SERVICE PROCEDURE

If a fault develops, notify CALIFORNIA INSTRUMENTS at support@argantix.com or its local representative, giving full details of the difficulty, including the model number and serial number. On receipt of this information, service information or a Return Material Authorization (RMA) number will be given. Add the RMA number furnished to the shipping label. Pack the instrument carefully to prevent transportation damage, affix label to shipping container, and ship freight prepaid to the factory. CALIFORNIA INSTRUMENTS shall not be responsible for repair of damage due to improper handling or packing. Instruments returned without RMA No. or freight collect may be refused at California Instruments discretion. All XDS Series Instruments repaired will be returned freight collect, Ex Works CALIFORNIA INSTRUMENTS, 9689 Towne Centre Drive, San Diego, CA 92121-1964. If requested, an estimate of repair charges will be made before work begins on repairs not covered by the Warranty.

DAMAGE IN TRANSIT

The instrument should be tested when it is received. If it fails to operate properly, or is damaged in any way, a claim should be filed immediately with the carrier. The claim agent should obtain a full report of the damage, and a copy of this report should be forwarded to us by fax or email (Fax: 858 677 0940, Email: support@argantix.com an estimate of repair cost and repair the instrument when authorized by the claim agent. Please include model number and serial number when referring to the instrument.

). CALIFORNIA INSTRUMENTS will prepare

SPARE PARTS

To order spare parts, user manuals, or determine the correct replacement part for your California Instruments products, please contact the Customer Service department by phone at + 1 858 404 6936, press 2 or by email support@argantix.com

XDS Series 5

User and Programming Manual

Table of Contents

Introduction .................................................................................................................................. 10

1.1 General Description ............................................................................................................................. 10

1.2 Bench Top use .................................................................................................................................... 11

1.3 Equipment Rack use ........................................................................................................................... 11

2 Specifications ............................................................................................................................... 12

2.1 Electrical .............................................................................................................................................. 12

2.2 Measurements .................................................................................................................................... 15

2.3 Environmental ..................................................................................................................................... 17

2.4 Mechanical .......................................................................................................................................... 17

2.5 Agency Approvals ............................................................................................................................... 18

2.6 Remote Control Interfaces .................................................................................................................. 18

2.7 Protection ............................................................................................................................................ 19

2.8 Controls and Indicators ....................................................................................................................... 19

2.9 Parallel Operation ................................................................................................................................ 19

2.10 Factory Configuration Options ......................................................................................................... 20

2.11 -LC Option ....................................................................................................................................... 20

3 Installation and Functional Test ................................................................................................... 21

3.1 Inspection ............................................................................................................................................ 21

3.2 Location and Mounting ........................................................................................................................ 21

3.3 Input / Output Connectors ................................................................................................................... 22

3.4 Wire Sizing and Lug Size .................................................................................................................... 25

3.5 AC Input Wiring ................................................................................................................................... 26

4 Front Panel Operation ................................................................................................................. 28

4.1 Functional Controls ............................................................................................................................. 28

4.2 How to examples... .............................................................................................................................. 31

4.3 Setting the Power on Initialization Values ............................................................................................ 33

4.4 Operating Modes ................................................................................................................................. 34

4.5 Special Features ................................................................................................................................. 35

5 Model Configurations ................................................................................................................... 37

5.1 Available Configurations ...................................................................................................................... 37

5.2 Changing Configurations ..................................................................................................................... 38

5.3 Stand Alone Configuration .................................................................................................................. 40

5.4 Parallel Mode ...................................................................................................................................... 40

5.5 RPV Mode ........................................................................................................................................... 43

5.6 RPC Mode ........................................................................................................................................... 43

6 Principle of Operation .................................................................................................................. 44

6.1 General ............................................................................................................................................... 44

6.2 Overall Description .............................................................................................................................. 44

6.3 Bias Power Supply (A7) ....................................................................................................................... 47

6.4 Power Module (A9 through A11) ......................................................................................................... 48

6.5 Controller Module (A3) ........................................................................................................................ 50

7 Calibration .................................................................................................................................... 52

7.1 Calibration Equipment ......................................................................................................................... 52

7.2 Routine Calibration .............................................................................................................................. 53

7.3 Non-Routine Calibration ...................................................................................................................... 56

6 XDS Series

User and Programming Manual

8 Service ......................................................................................................................................... 59

8.1 General ............................................................................................................................................... 59

8.2 Basic Operation ................................................................................................................................... 59

8.3 Module Removal ................................................................................................................................. 62

8.4 Controller Jumper Settings .................................................................................................................. 65

8.5 Replaceable Parts ............................................................................................................................... 67

9 Remote Control ............................................................................................................................ 70

9.1 Introduction ......................................................................................................................................... 70

9.2 XDSGUI Program Requirements ......................................................................................................... 71

9.3 RS232C Interface ................................................................................................................................ 71

9.4 Optional IEEE Interface ....................................................................................................................... 73

9.5 XDSGUI Installation ........................................................................................................................... 74

9.6 Trouble Shooting - RS232C ................................................................................................................ 75

9.7 Trouble Shooting - IEEE-488 / GPIB ................................................................................................... 78

9.8 Software Registration .......................................................................................................................... 79

10 Introduction to SCPI ................................................................................................................. 80

10.1 Conventions Used in This Manual ................................................................................................... 80

10.2 The SCPI Commands and Messages ............................................................................................. 80

10.3 Using Queries .................................................................................................................................. 83

10.4 Structure of a SCPI Message .......................................................................................................... 83

10.5 SCPI Data Formats ......................................................................................................................... 85

10.6 Programming Tips ........................................................................................................................... 86

11 SCPI Command Reference ...................................................................................................... 87

11.1 Subsystem Commands ................................................................................................................... 87

11.2 Measurement Subsystem ................................................................................................................ 88

11.3 Source Subsystem .......................................................................................................................... 90

11.4 Output Subsystem ........................................................................................................................... 95

11.5 Display Subsystem .......................................................................................................................... 97

11.6 System Commands ......................................................................................................................... 98

11.7 Common Commands .................................................................................................................... 100

12 Programming Examples ......................................................................................................... 107

12.1 Introduction ................................................................................................................................... 107

12.2 Programming the Output ............................................................................................................... 107

12.3 Making Measurements .................................................................................................................. 108

13 Status Registers ..................................................................................................................... 109

13.1 Power-On Conditions .................................................................................................................... 109

13.2 Standard Event Status Group........................................................................................................ 110

13.3 Status Byte Register ...................................................................................................................... 110

13.4 Examples ...................................................................................................................................... 111

Appendix A: SCPI Command tree .................................................................................................... 112

Appendix B: SCPI Conformance Information ................................................................................... 113

Appendix C: Error Messages ............................................................................................................ 114

Index .................................................................................................................................................. 115

XDS Series 7

User and Programming Manual

List of Figures

Figure 1-1: XDS Series DC Power Supply .......................................................................................................... 10

Figure 3-1: Location of rear panel connectors. .................................................................................................... 24

Figure 3-2: DC Output bus bar studs. ................................................................................................................. 25

Figure 3-4: Toroid Installation, -400V input model. .............................................................................................. 26

Figure 3-5: Outline Drawing XDS DC Supply ...................................................................................................... 27

Figure 4-1: Front Panel View ............................................................................................................................... 28

Figure 4-2: Shuttle Knob ..................................................................................................................................... 29

Figure 5-1: XDS Configuration Jumper Locations ............................................................................................... 38

Figure 5-2: XDS Controller Jumper Locations – Front view, far side of PWB. ..................................................... 39

Figure 5-3: Master / Auxiliary Interconnect Cable Diagram ................................................................................. 40

Figure 5-4: Parallel Cable Interconnect Accessory .............................................................................................. 41

Figure 5-5: XDS 30KW System Connections ...................................................................................................... 42

Figure 6-1: DC Power Supply Block Diagram - -IF option shown ........................................................................ 45

Figure 6-2: XDS DC Supply Simplified Block Diagram ........................................................................................ 46

Figure 6-3: Power Module Block Diagram ........................................................................................................... 48

Figure 7-1: Test Equipment Hookup for Routine Output and Measurement Calibration ...................................... 53

Figure 7-2: Calibration Adjustments .................................................................................................................... 54

Figure 8-1: Assembly Location ............................................................................................................................ 62

Figure 8-2: XDS Controller Jumper Locations – Front view, far side of PWB. ..................................................... 66

Figure 8-3: Replaceable Fuse Locations ............................................................................................................. 69

Figure 9-1: XDSGUI Main screen ........................................................................................................................ 70

Figure 9-2: Rear Panel View ............................................................................................................................... 73

Figure 9-3: GPIB Address Selection Switch ........................................................................................................ 73

Figure 9-4: System Properties Dialog Box .......................................................................................................... 76

Figure 9-5: Advanced Port Settings Dialog Box .................................................................................................. 76

Figure 9-6: COM Port Properties Dialog Box ...................................................................................................... 76

Figure 9-7: NI PCI-GPIB Settings ........................................................................................................................ 78

Figure 9-8: NI PCI-GPIB Advanced Settings Dialog ............................................................................................ 78

Figure 10-1: Partial Command Tree .................................................................................................................... 81

Figure 10-2: Command Message Structure ........................................................................................................ 83

Figure 13-1: Power Supply Status System Model ............................................................................................. 109

8 XDS Series

User and Programming Manual

List of Tables

Table 3-1: Rear Panel Input and /Output Connectors ......................................................................................... 22

Table 3-2: Output Connection Description .......................................................................................................... 22

Table 3-3: Input Connection Description ............................................................................................................. 23

Table 3-4: RS232C Connector J20 ..................................................................................................................... 23

Table 3-5: Analog I/O Connector J22 .................................................................................................................. 23

Table 3-6: Auxiliary I/O Connector (Isolated ) – J21 ............................................................................................ 24

Table 3-7: Minimum Wire Size Table .................................................................................................................. 25

Table 4-1: Factory Default Power on Settings ..................................................................................................... 33

Table 5-1: XDS Controller Configuration Options ................................................................................................ 37

Table 5-2: Configuration Jumper Settings - Mode ............................................................................................... 38

Table 7-1: Calibration Equipment ........................................................................................................................ 52

Table 7-2: Load Resistors and Current by model ................................................................................................ 52

Table 7-3: Calibration Adjustment Reference by number .................................................................................... 55

Table 7-4: Calibration Adjustment Reference by location left to right .................................................................. 55

Table 8-1: Basic Symptoms ................................................................................................................................ 59

Table 8-2: Poor Output Voltage Accuracy ........................................................................................................... 59

Table 8-3: Poor Output Voltage Regulation ......................................................................................................... 59

Table 8-4: No Output and No Lights on Front Panel ........................................................................................... 60

Table 8-5: No Output But "Display" Is On ........................................................................................................... 60

Table 8-6: DC Controller Configuration Jumper Settings - Mode ........................................................................ 65

Table 8-7: DC Controller Jumper configurations - Power Level ........................................................................... 65

Table 8-8: DC Controller Jumper configurations - OVP mode ............................................................................. 65

Table 8-9: Replaceable Parts .............................................................................................................................. 68

Table 8-10: Power Module Output Capacitance .................................................................................................. 68

Table 11-1: Mode query result decoding ............................................................................................................. 92

Table 11-2: Display Mode Command Encoding .................................................................................................. 97

Table 11-3: Bit Configuration of Standard Event Status Enable Register ......................................................... 101

Table 11-4: Bit Configuration of Standard Event Status Register ...................................................................... 102

Table 11-5: *RST Default Parameter Values ..................................................................................................... 104

Table 11-6: Status Registers - Power on Conditions ......................................................................................... 104

Table 11-7: Bit Configuration of Status Byte Register ....................................................................................... 106

Table 13-1: Bus Error Messages ....................................................................................................................... 114

XDS Series 9

User and Programming Manual

1 Introduction

1.1 General Description

Figure 1-1: XDS Series DC Power Supply

The Argantix XDS Series of DC Programmable Power Supplies are designed specifically for laboratory test and systems applications requiring single output, variable DC voltage and current with good ripple and regulation characteristics. The XDS Series comes in a 3U chassis and can operate in constant current or constant voltage mode with auto crossover feature. Available Power levels are 5kW, 10kW and 15kW.

Simple front panel controls enable the voltage and current limit to be changed. Measurements of voltage, current, peak current and power can also be read from the front panel LED displays.

The front panel contains a output on/off button for controlling the DC supply output and an LED indicator that informs the operator of the output status at all time.

The left hand side LED display is used to display the programmed voltage as well as the measured output voltage. The LED display to the right is used to program the current or to display measured current, peak current or power. The display SELECT button can be used to set the desired display mode.

A standard RS232C and optional IEEE 488 interface is available for applications that require remote control and measurements. While operated remotely, the front panel can be locked out and the remote control status is indicated by a REMOTE LED.

A power on/off switch can be used to turn the DC supply on or off.

Note: This user manual applies to the XDS models series II with the 5005-720-1

controller assembly. For first generation XDS DC models with controller assembly 5005-708-1, refer to user manual P/N 5005-980 instead. First generation XDS models typically do not have the air vents in the front panel.

10 XDS Series

User and Programming Manual

1.2 Bench Top use

The XDS Series DC Supply may be used as a bench top unit provided adequate provisions are made to protect the end-user from touching the output terminals. To this end, output covers are provided on all XDS units. These covers must be installed during use and may only be removed when the unit is not in use and disconnected from AC mains.

Adequate air flow must be maintained at all times so care should be taken not to block the front, top and side air intakes or the rear air exhaust. Leave at least 4" of clearance at the back of the unit to allow proper airflow.

1.3 Equipment Rack use

The XDS Series uses a 19" cabinet with rack ears and can be installed in a standard equipment rack. Due to the weight of the unit however, it must be properly supported by either a shelf or L brackets on both sides. The rack ears are not designed to support the full weight of the XDS unit when installed in a cabinet but only to prevent it from sliding out.

Contact Argantix customer support (support@argantix.com specific cabinets depths.

Proper airflow must be maintained in the instrument cabinet and the rear of the cabinet should not be closed off by a door but rather a perforated screen allowing adequate airflow. It is also important to leave enough clearance above each unit as some of the air intake is on the top cover.

Note: For optimal cooling, it is recommended to leave a 1.75" (1 U) space above

each XDS unit.

This space may be covered by a louvered cover plate to allow some air intake from the front of the cabinet. When planning cabinet space, allow for 4U per DC supply.

If insufficient rack space is available, the top vents may be blocked off by stacking units directly on top of each other but maximum power may not be available at maximum ambient temperature due to over temp fault.

) for information on rack mount kits for

XDS Series 11

User and Programming Manual

2 Specifications

All specifications at 23  5C unless noted otherwise.

2.1 Electrical

2.1.1 AC Line Input

Standard: -208: 208 VAC L-L -10% to 230VAC L-L +10 %

Options: -400: 400VAC L-L ± 10 %

-480: 480VAC L-L ± 10 % Frequency: 50 to 60 Hz ± 3 Hz Phases: 3-phase, 3-wire plus safety ground Power Factor: > 0.65 typical.

2.1.2 Maximum Line Input Current per Phase at Low Line

Current 5 KW 10 KW 15 KW

Standard -208 27A 54A 81A Options -400

-480:

Recommended circuit protection per phase. (CB)

Standard -208 30A 60A 90A Options -400

-480:

2.1.3 Output Power

DC Power: 5 KW, 10 KW or 15 KW depending on model. See section 2.1.5.

2.1.4 Output Voltage

Voltage Range: Voltage Programming:

XDS 30-XXX 0 - 30 V 0.01 V ± 0.08 V XDS 40-XXX 0 - 40 V 0.01 V ± 0.08 V XDS 50-XXX 0 - 50 V 0.02 V ± 0.16 V

XDS 80-XXX 0 – 80 V 0.02 V ± 0.16 V XDS 100-XXX 0 - 100 V 0.1 V ± 0.2 V XDS 150-XXX 0 - 150 V 0.1 V ± 0.4 V XDS 250-XXX 0 - 250 V 0.1 V ± 0.8 V

18A 18A

20A 20A

Maximum power is available at full-scale voltage.

See section 2.1.5

Model Range Resolution Accuracy

36A 36A

40A 40A

54A 54A

60A 60A

12 XDS Series

User and Programming Manual

XDS 300-XXX 0 - 300 V 0.1 V ± 0.8 V XDS 400-XXX 0 - 400 V 0.1 V ± 1.6 V XDS 600-XXX 0 - 600 V 0.2 V ± 1.6 V

Noise and Ripple:

See section 2.1.5

Line Regulation: < 0.1% of V Range Load Regulation: < 0.1% of V Range External Sense External Voltage Sense mode.

Maximum voltage drop allowed at load terminals is 5% of voltage range.

Note: For 600V models, maximum drop allowed is 3% (20Vdc). OVP Range: 0 to 110 % of V Range Transient Response: A 30% step load will recover to within 2% of voltage range value

within 2 msec. Stability: +/- 0.05% of max. rating for 8 Hrs. at fixed line, load and temp

after 30 minutes warm up period

2.1.5 Ranges, Noise and Ripple

Model

XDS 30-167 XDS 30-333 XDS 30-500

XDS 40-125 XDS 40-250 XDS 40-375

XDS 50-100 XDS 50-200 XDS 50-300

XDS 80-62 XDS 80-125 XDS 80-187

XDS 100-50 XDS 100-100 XDS 100-150

XDS 150-33 XDS 150-66 XDS 150-100

XDS 250-20 XDS 250-40 XDS 250-60

XDS 300-17 XDS 300-33 XDS 300-50

XDS 400-12 XDS 400-25 XDS 400-37

Maximum RMS Ripple < 2 x typical value shown.

Power

Max.

5 10 15

Volts

Max.

30 30 30

40 40 40

50 50 50

80 80 80

150 150 150

250 250 250

300 300 300

400 400 400

Output

Amps

Max.

167 333 500

125 250 375

100 200 300

62.5 125

187.5 50

100 150

33.3

66.7 100

20 40 60

33.3

12.5

37.5

RMS Ripple

Typical1

15 mV 15 mV 15 mV

25 mV 25 mV 25 mV

100 mV 100 mV 100 mV

250 mV 250 mV 250 mV

Peak-Peak Ripple typ.

90 mV 90 mV 90 mV

250 mV 250 mV 250 mV

300 mV 300 mV 300 mV

400 mV 400 mV 400 mV

2 V 2 V 2 V

XDS Series 13

User and Programming Manual

XDS 600-8 XDS 600-17 XDS 600-25

2.1.6 Output Current

Current Range: See section 2.1.5 Current Programming:

Resolution: Shown in column 3 by model.

XDS 30-167 XDS 30-333 XDS 30-500

XDS 40-125 XDS 40-250 XDS 40-375

XDS 50-100 XDS 50-200 XDS 50-300

XDS 80-62 XDS 80-125 XDS 80-187

XDS 100-50

XDS 100-100 XDS 100-150

XDS 150-33 XDS 150-66

XDS 150-100

XDS 250-20 XDS 250-40 XDS 250-60

XDS 300-17 XDS 300-33 XDS 300-50

XDS 400-12 XDS 400-25 XDS 400-37

XDS 600-8 XDS 600-17 XDS 600-25

Line Regulation: < 0.1% of I Range

5 10 15

600 600 600

8.33 17 25

250 mV 250 mV 250 mV

2 V 2 V 2 V

Accuracy: Accuracy shown in last column as % of Full Scale (FS) from 100

% programmed to 0% programmed.

Model Range Resolution Accuracy

0 - 167 A 0 - 333 A 0 - 500 A

0 - 125 A 0 - 250 A 0 - 375 A

0 - 62.5 A

0 - 125 A

0 - 187.5 A

0 - 50 A 0 - 100 A 0 - 150 A

0 - 33.3 A 0 - 66.7 A

0 - 100 A

0 - 20 A

0 - 40 A

0 - 60 A

0 - 16.7 A 0 - 33.3 A

0 - 50 A

0 – 12.5 A 0 – 25.0 A 0 – 37.5 A

0 - 8.3 A

0 - 16.7 A

0 - 25 A

0.1 A

0.2 A

0.1 A

0.2 A

0.1 A

0.02 A

0.1 A

0.02 A

0.1 A

0.01 A

0.02 A

0.1 A

0.005 A

0.01 A

0.02 A

0.005 A

0.01 A

0.02 A

0.005 A

0.01 A

0.02 A

0.003 A

0.005 A

0.01 A

0.5 %

Load Regulation: < 0.1% of I Range Stability:

14 XDS Series

+/- 0.05% of max. rating for 8 Hrs. at fixed line, load and temp after 30 minutes warm up period

User and Programming Manual

2.2 Measurements

Voltage Model Range Resolution Accuracy

XDS 30-XXX 0 - 30 V 0.01 V ± 0.05 V XDS 40-XXX 0 - 40 V 0.01 V ± 0.05 V XDS 50-XXX 0 - 50 V 0.02 V ± 0.1 V XDS 80-XXX 0 - 80 V 0.02 V ± 0.1 V XDS 100-XXX 0 - 100 V 0.1 V ± 0.2 V XDS 150-XXX 0 - 150 V 0.1 V ± 0.3 V XDS 250-XXX 0 - 250 V 0.1 V ± 0.5 V XDS 300-XXX 0 - 300 V 0.1 V ± 0.5 V XDS 400-XXX 0 - 400 V 0.1 V ± 0.5 V XDS 600-XXX 0 - 600 V 0.2 V ± 1.0 V

Current Model Range Resolution Accuracy

XDS 30-167 XDS 30-333 XDS 30-500

XDS 40-125 XDS 40-250 XDS 40-375

XDS 50-100 XDS 50-200 XDS 50-300

XDS 80-62 XDS 80-125 XDS 80-187

XDS 100-50 XDS 100-100 XDS 100-150

XDS 150-33 XDS 150-66 XDS 150-100

XDS 250-20 XDS 250-40 XDS 250-60

XDS 300-17 XDS 300-33 XDS 300-50

XDS 400-12 XDS 400-25 XDS 400-37

XDS 600-8 0 - 8 A 0.003 A ± 0.013 A

0 - 167 A 0 - 333 A 0 - 500 A

0 - 125 A 0 - 250 A 0 - 375 A

0 - 100 A 0 - 200 A 0 - 300 A

0 - 66 A 0 - 125 A 0 - 187 A

0 - 50 A 0 - 100 A 0 - 150 A

0 - 33 A

0 - 66 A 0 - 100 A

0 – 20 A

0 - 40 A

0 - 60 A

0 - 17 A

0 - 33 A

0 - 50 A

0 – 12.5 A

0 - 25 A

0 – 37.5 A

0.1 A

0.2 A

0.1 A

0.02 A

0.1 A

0.02 A

0.1 A

0.01 A

0.02 A

0.1 A

0.005 A

0.01 A

0.02 A

0.005 A

0.01 A

0.02 A

0.005 A

0.01 A

0.02 A

± 0.3 A ± 0.5 A

± 1 A

± 0.3 A ± 0.5 A ± 0.5 A

± 0.1 A ± 0.3 A ± 0.3 A

± 0.05 A

± 0.1 A ± 0.3 A

± 0.025 A

± 0.05 A

± 0.1 A

± 0.025 A

± 0.05 A

± 0.1 A

± 0.025 A

± 0.05 A

± 0.1 A

XDS Series 15

User and Programming Manual

XDS 600-17 XDS 600-25

0 - 17 A

0 - 25 A

0.005 A

0.01 A

± 0.025 A

± 0.05 A

Power Model Range Resolution Accuracy

All 0 - 5 KW

0 -10 KW

0 - 15 KW

1 W 2 W 5 W

± 0.3 % FS

Peak Current Model Range Resolution Accuracy

All See current table See current table See accuracy in

current table

+ 3 x resolution

16 XDS Series

User and Programming Manual

2.3 Environmental

Temperature Coefficient

Voltage Set Point: 0.02%/C of V Range Current Set Point: 0.03%/C of I Range

Ambient Temperature

Operating: 0° to 40° C / 32° to 104° F

Storage: -40° to 75° C /-40° to 167° F Humidity: 0 to 80 % RH, non condensing Cooling: Forced Air. Front, side and top air intake, rear exhaust. Altitude

Operating: 2000 meters max.

Storage: 6000 meters max.

2.4 Mechanical

Dimensions: Width: 19.00 “/ 482.6 mm

Depth: 22.19”/ 563.3 mm (excluding bus bars and cover) Height: 5.25”/133.35 mm

Unit Weight: 15 kW model: Net: 90 Lbs. / 40.8 Kg.

Gross: 125 Lbs. / 56.7 Kg

10 kW model: Net: 70 Lbs. / 31.8 Kg.

Gross: 105 Lbs. / 47.6 Kg

5 kW model: Net: 50 Lbs. / 22.7 Kg.

Gross: 85 Lbs. / 38.6 Kg

Material: Chassis: Steel. (Anodized)

Top cover: Aluminum (Anodized)

Front panel Aluminum (Anodized) Cooling: Forced air, side and top intake, rear exhaust Acoustic Noise Level:

(Measured at 1 meter from front of unit).

Internal Construction: Modular construction. Rear Panel

Connections: Rack Mounting Unit must be supported by shelf or brackets when mounted in 19"

5 KW: < 55 dBA

10KW: < 60 dBA

15KW: < 65 dBA

AC Power Input, DC power out, RS232, GPIB (option), Analog

Programming (option)

cabinet.

No provisions for rack slides are made on instrument.

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2.5 Agency Approvals

CE Mark:

GENERAL: IEC 61326-1, 1998

SAFETY: IEC 61010-1, 2001

EMC: EN55011, Class A, Group 1

IEC 61000-4-2, 1995 IEC 61000-4-4, 1995

IEC 61000-4-5, 1995 IEC 61000-4-6, 1996

IEC61000-4-8, IEC 61000-4-11, 1994

2.6 Remote Control Interfaces

Standard:

Digital

9 pin D-Shell connector Handshake: CTS, RTS Data bits: 8 Stop bits: 1 Baud Rate: 19200 SCPI Syntax

Analog

Input: 0 - 10 VDC / 0 – 5 VDC for 0 to full scale voltage (RPV) or

Input impedance 10 KOhm Accuracy: 0.5 % See section 5 for details.

Output: Auxiliary drive output signal. See section 5 for details.

Remote

Inhibit

-IF Option: GPIB Interface is part of -IF Option

IEEE-488 IEEE-488 Interface option:

IEEE-488 (GPIB) talker listener

RS232C Interface:

Shuts down output. Factory default operation is output disabled with contact closure or logic low input. Operation mode can be inverted to shut down when connection is broken/interrupted using SYST:CONF and SYST:SAVE commands. Connects to J22 pin 1 and 14 (Iso com) on rear panel.

current limit (RPC) .

Subset: AH1, L3, RL2, SH1, T8 IEEE-488.2 SCPI Syntax

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2.7 Protection

 Over temperature shut down  Short circuit protection  Overload protection  Over voltage  Voltage sense lines open.

2.8 Controls and Indicators

Controls: Voltage Setting: Digitally encoded rotary knob Current Setting: Digitally encoded rotary knob Measurement

Select Output on/off: Push button Power on/off: Toggle Switch

Indicators: Display: Dual, seven segment LED's LED’s for: Output on/off Constant Current mode Constant Voltage mode Remote Interface state Selected Measurement: Curr, Peak Curr, Power

Push button

2.9 Parallel Operation

Two or more XDS power supply of the same model number (voltage range and power level must match) may be combined to create a higher power system. This requires one master unit (default) and one or more auxiliary units (-AUX).

The maximum number of XDS units that can be paralleled is 5 (1 master + 4 auxiliary units). The following specifications apply to multi-box XDS configurations:

Parameter

Current Range: Multiply by number of XDS units. Current Programming:

Accuracy: Multiply by number of XDS units.

Resolution: Same as single XDS unit.

Current Sharing Within 2 % of combined current range. Current ripple Multiply by number of XDS units

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2.10 Factory Configuration Options

All XDS models can be factory configured with the options shown below. Configuration changes can be made in the field if needed. Refer to Chapter 5 for details on changing configuration settings.

Option Configuration

none Stand-alone and Master operation.

-AUX Auxiliary configuration. Can be used with Master XDS unit to increase power level.

-RPV10 Stand-alone operation with analog voltage programming, 0 – 10 V.

-RPV5 Stand-alone operation with analog voltage programming, 0 – 5 V.

-RPC10 Stand-alone operation with analog current limit programming, 0 – 10 V.

-RPC5 Stand-alone operation with analog current limit programming, 0 – 5 V.

2.11 -LC Option

The –LC option reduces the output capacitance of each DC power module. This results in improved rise and fall times compared to a standard XDS unit. The output noise and ripple specification is increased by a factor of 2 when adding the –LC option. This option is available only on models with voltage ranges of 100V and below. The –LC option must be ordered at time of initial orders. This option cannot be retrofitted.

-LC Option Output capacitance with LC option

Capacitance per 5 KW module. 30V 11200 uF 44000 uF 40V 7800 uF 30000 uF 50V 7800 uF 24000 uF 80V 3000 uF 7800 uF

100V 940 uF 4400 uF

Note: -LC option is available only on 30V, 40V, 50V, 80V and 100V output voltage range models.

Standard Unit

Capacitance per 5 KW module.

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3 Installation and Functional Test

3.1 Inspection

Inspect the shipping carton for possible damage before unpacking the unit. Carefully unpack the equipment.

Save all packing materials until inspection is complete. Verify that all items listed on the packing slips have been received. Visually inspect all exterior surfaces for broken knobs, connectors or meters. Inspect for dented or damage exterior surfaces. External damage may be an indication of internal damage. If any damage is evident, immediately contact the carrier that delivered the unit and submit a damage report. Failure to do so could invalidate future claims.

3.2 Location and Mounting

Bench Use

Adequate air flow must be maintained at all times so care should be taken not to block the top and side air intakes or the rear air exhaust. Leave at least 4" of clearance at the back of the unit to allow proper airflow.

Rack Use

Proper airflow must be maintained in the instrument cabinet and the rear of the cabinet should not be closed off by a door but rather a perforated screen allowing adequate airflow.

NOTE: The unit should be provided with the proper ventilation. The top, rear and

both sides of the unit should be free of obstructions. A 1.75" (1 U) spacing between units mounted in the same cabinet is recommended.

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3.3 Input / Output Connectors

Table 3-1 lists all external connections for the XDS Series. Table 3-2 and Table 3-3 provide input and output connector descriptions.

NOTE: DO NOT REVERSE THE EXT. SENSE CONNECTION POLARITY OR

DAMAGE TO THE XDS SUPPLY WILL RESULT.

For permanently connected equipment, a readily accessible disconnect device shall be incorporated in the fixed wiring. For equipment connected through an outlet socket, the outlet must be installed near the equipment and must be easily accessible.

NOTE: For proper connection to the mains, a suitable circuit breaker or fuse is

required. The rating will depend on the units' nominal AC input voltage. If a fuse is used, a suitable disconnect device should be installed to allow AC input to be removed from the supply.

NOTE: When connecting the AC Input wiring, DO NOT APPLY MORE THAN 32

INCH POUND (equivalent to 2.67 lbf feet or 3.62 Nm) of torque to the input terminal connection studs and screws.

Table 3-1: Rear Panel Input and /Output Connectors

Connector AC Input Function Connects To

L1 – AC in L2 – AC in L3 – AC in CHASSIS - GND

Primary AC Power Input 208 - 230 VAC nominal (Std)

400 VAC nominal 480 VAC nominal

Limit torque applied to 32 inch pound force/

2.7 foot pond force / 3.6 Nm.

DC Output Function Connects To

Positive Bus Bar Negative Bus Bar

DC output User Load

Table 3-2

Other Function Table

Isolated Analog I/O Control Interface (option) DB15, J22, Table 3-5 RS232 Control Interface DB9, J20, Table 3-4 Auxiliary I/O Misc. DB9, J21, Table 3-6 Remote Inhibit Output shut-off DB15, J22, Table 3-5 IEEE-488 Control Interface (option) GPIB 24 pin, J23. See IEEE-488 standard

for pin out.

Table 3-2: Output Connection Description

Supply Type Connection Description

For Output voltages <= 60V

Bus Bar with threaded Stud. (Do not exceed 10 foot

pound force / 13.5 Nm of torque when tightening nuts of bus bars)

For Output Voltages > = 80V Bus Bar with threaded Stud and a rear safety cover

22 XDS Series

(Do not exceed 10 foot pound force / 13.5 Nm of torque when tightening nuts of bus bars)

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Table 3-3: Input Connection Description

AC In. Designator Dir. Connection Description

1 ØA Input 10-32 Threaded Stud 2 ØB Input 10-32 Threaded Stud 3 ØC Input 10-32 Threaded Stud 4 GND 10-32 Threaded Stud

Table 3-4: RS232C Connector J20

J20, Pin Designator Dir. Description

1 Not used N/C 2 TxD Output Transmit data 3 RxD Input Receive data 4 Not used N/C 5 Common Common 6 Not used N/C 7 CTS Input Clear to send 8 RTS Output Request to send 9 Not used N/C

Table 3-5: Analog I/O Connector J22

J22, Pin Designator Dir. Description

1 ON / OFF Input ON/OFF (Remote Inhibit).

Mode 0: Switch/relay contacts or a direct short between this terminal and ISO RTN (pin 10) will turn off the power supply. Mode 1: A logic high or a disconnect between this terminal and ISO RTN (pin 10) will turn off the power supply. The mode can be set over the RS232C or GPIB bus using the SYST:CONF command and retained at

power on using the SYST:SAVE command. 2 Not used N/C 3 Not used N/C 4 V/I PROG

10V

Input Isolated

Remote analog programming. Using a 0-10VDC

source referenced to pin 10 or 14 (ISO RTN/COM)

will program the output voltage or current from 0 to

100%. Mode is determined by controller settings. 5 Not used N/C

6 Not used

7-9 Not used N/C

10 ISO RTN Isolated Return path. Internally connected to pin 14. 11 V/I PROG 5V Input

Isolated

Remote analog programming. Using a 0-5VDC

source referenced to pin 10 or 14 (ISO RTN/COM)

will program the output voltage or current from 0 to

100%. Mode is determined by controller settings.

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J22, Pin Designator Dir. Description

11 Not used N/C 12 Not used N/C 13 Not used N/C 14 ISO COM Isolated Return path to be used with pins V/I PROG 5V and

V/I PROG 10V. Internally connected to pin 10.

15 Not used N/C

Table 3-6: Auxiliary I/O Connector (Isolated ) – J21

J21, Pin Designator Dir. Description

1 Not used N/C 2 ISO COM Isolated Return path to be used with pin 6. 3 Not used N/C 4 Not used N/C 5 Not used N/C 6 I MON Output Output current monitor. 7 Not used N/C 8 Not used N/C 9 Not used N/C

Figure 3-1: Location of rear panel connectors.

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3.4 Wire Sizing and Lug Size

The DC output is available from a set of copper bus bars, one for the positive terminal, out for the negative terminal. Each bus bar has two screw studs, (Penn Engineering, HFHB-0518-24, see

www.pennfast.com

recommended ring-lug size that mates with these 5/16-18 thread studs for connecting output wiring is 5/16” (standard) or 8M (metric). The wire gauge and ring-lug crimp size must be matched. Crimp ring lugs are generally available from Tyco/AMP and catalog vendors like Mouser, Digikey etc. See paragraph 3.5 for AC input wire lug size.

) to which a set of two nuts and lock washers are attached. The

Figure 3-2: DC Output bus bar studs.

Care must be taken to properly size all conductors for the input and output of the power supply. Table 3-7 bellow gives minimum recommended wire size for the input. This table is derived from the National Electrical Code and is for reference only. Local laws and conditions may have different requirements. The table is for copper wire only.

Table 3-7: Minimum Wire Size Table

Size Temperature Rating of Copper Conductor

AWG MCM

14 20 20 25 25 12 25 25 30 30 10 30 35 40 40 8 40 50 55 55 6 55 65 70 75 4 70 85 95 95 3 85 100 110 110 2 95 115 125 130 1 110 130 145 150 0 125 150 165 170 00 145 175 190 195 000 165 200 215 225 0000 195 230 250 260

60 C 75 C 85 C 90 C Types Types Types Types RUW, T, TW UF FEPW,M R, RHW,

RUH, THW, THWN, XHHW, USE, ZW

Current Rating

V, MI TA, TBS, SA, AVB,SIS,

FEP, FEPB, RHH, THHN, XHHW

For higher ratings wires can be paralleled or refer to the National Electrical Code.

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3.5 AC Input Wiring

All XDS models require 3 phase AC input. A neutral connection is not available, as the XDS only requires a delta input. If only three-phase Wye AC power is available, verify the correct Line-to-Line voltage and connect only the phase wires.

The Safety Ground connection MUST be made to the stud marked with the earth ground symbol.

The AC input wires must be terminated with ring lugs (AC input stud size is ¼”-20 thread, M4 metric) of at least ¼” (7 mm) diameter. See Figure 3-3.

Before attaching wires to line input terminals, wires must pass-thru strain relief on the safety cover. Always install the AC input safety cover and strain relief provided with the unit. The ground wire should be longer than the three power phase wires by at least 1 inch.

3.5.1 EMI Toroid Installation – 400V Models

To meet CE Mark conducted emissions, models with 400V AC input must have the supplied ferrite toroid installed on the AC input wiring as shown. Loop the three phase conductors through the supplied toroid 4 times (4 turns). This means they loop around the outside of the toroid one time. This should be done before passing the AC input wires through the safety cover strain relief and attached them to the AC input terminal studs on the rear of the XDS unit.

Figure 3-3: AC Input Terminals

Wind 3 line input wires 4 turns thru toroid.

26 XDS Series

Figure 3-4: Toroid Installation, -400V input model.

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XDS Series 27

Figure 3-5: Outline Drawing XDS DC Supply

User and Programming Manual

4 Front Panel Operation

4.1 Functional Controls

The front panel can be divided in a small number of functional areas:

 Status Indicator lights  Shuttle knobs  LED displays  Button controls

4.1.1 Status Indicator Lights

Seven green LED status indicators are located on the front panel. These LED’s correspond to the following conditions:

CV MODE Indicates the DC Supply is operating in the Constant Voltage

CC MODE Indicates the DC Supply is operating in the Constant Current

OUTPUT The Output LED indicates the status of the OUTPUT. The output

CURR Illuminates when the LED display shows the programmed or

PK CUR Illuminates when the LED display shows the measured peak

PWR Illuminates when the LED display shows the measured power.

Figure 4-1: Front Panel View

mode.

is controlled by the OUTPUT ON/OFF button located directly below the LED. When the Output LED is not lit, the output voltage is not present at the output terminals regardless of the voltage setting.

measured current.

current.

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REMOTE The REMOTE LED indicates that the unit is in remote control

mode. If the RS232C interface is used, the REMOTE state can be enabled by the controller using the SYST:REM command. Any time the REMOTE LED is lit, the front panel of the XDS Series unit is disabled. There is no LOCAL button that allows the user to regain control of the front panel. The SYST:LOC command will enable the front panel controls. When using the optional IEEE interface, the remote /local state is controlled by the REN (Remote Enable) interface line.

4.1.2 Shuttle knobs

Counter Clockwise clockwise

DECREASE INCREASE

There are two shuttle knobs located below the LED displays which are used to change settings for voltage and current. The left shuttle always controls the voltage. The right shuttle always controls the current.

4.1.3 Buttons

There are only two buttons on the front panel. One is used to toggle the Output State, the other to toggle display modes for the right hand side segment LED. The following is a description of these buttons:

KEY DESCRIPTION

OUTPUT ON/OFF The OUTPUT ON/OFF button will toggle the output on or off.

SELECT The SELECT button selects the function of the right Shuttle knob

Figure 4-2: Shuttle Knob

The LED above the button will light when the output is on. No output voltage will be present when the OUTPUT ON/OFF button is off despite the level of voltage programmed.

and the LED display. The right hand Shuttle knob will program the current limit and the display will show its value in the current mode. The display will revert back to showing the measured current after 3 seconds from the last movement of the shuttle. The SELECT button also allows selection of the desired measurement function readout. Available selections are:

 Current (Also puts the shuttle in Current Limit set mode)  Peak Current  Power

Measurements are updated 2 times per second. The display mode is indicated by the LED’s above the segment LED display. Note that voltage measurements are available through the Voltage LED.

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4.1.4 LED Segment Displays

Settings and measurements are shown on two 4 digit, 7 segment LED displays. The voltage display shows the programmed voltage as the user turns the left knob. After releasing the knob for about 3 seconds, this display reverts back to displaying the measured output voltage. The right hand LED display is a multi purpose display. For setup purposes, it always displays the Current limit setting. After about 3 seconds on inactivity, this display switches to the selected measurement parameter. The SELECT button will define the operating mode or the selected measurement parameter for the right hand display.

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4.2 How to examples...

This section covers some common tasks that are often performed with an DC power supply. These examples are written in a How to... format and provide step by step instructions on how to set up the DC supply for a specific task.

4.2.1 Set the Output

Output parameters are Voltage and Current Limit.

1. Disable the output by pressing the OUTPUT button. The LED above the button will turn off.

2. Use the left shuttle to set the output voltage. Clockwise will increase the output, counter clockwise will reduce the output. The display above the shuttle will show the voltage setting.

3. Use the right shuttle to set the current limit. The SELECT button will define the function of the right hand side LED display.

4. Enable the output by pressing the OUTPUT button.

4.2.2 Slew Output Values

The output parameters can be slewed using the shuttles.

1. Enable the output by pressing the OUTPUT button. The LED above it will turn on.

2. Use the left shuttle to set the output voltage. Clockwise will increase the output, counter clockwise will reduce the output. The display above the shuttle will show the voltage setting.

3. Use the right shuttle to set the current limit. The LED’s located above the display will indicate the selected measurement display function.

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4.2.3 Display Measurement Data

Measurements are always active and can be displayed as follows:

1. For voltage, the left display always displays the measured output voltage unless the knob

is turned. As the knob is turned, the programmed voltage will be displayed instead. After releasing the knob for about 3 seconds, the display reverts back to the measured voltage.

2. All other measurements can be displayed by using the SELECT button to toggle through

the available measurements. The LED’s above the LED segment display indicates the current selection. The knob only affects the current limit set.

3. Moving the right shuttle knob will interrupt the selected measurement and put the display

back in Current Limit adjust mode.

4.2.4 Control the Output

The Output can be disabled or enabled using the ON/OFF button as follows:

1. Pressing the OUTPUT button when the output LED is on will turn off the DC supply output. The programmed voltage setting will remain at the last program value.

2. Pressing the OUTPUT button again will engage the output and the output will revert to the last programmed value.

4.2.5 Measure Peak Inrush Current

The peak current measurement function of the XDS Series uses a sample and hold circuit to track the highest peak current found until reset. The peak current sample and hold circuit is reset any time the user toggles away from the peak current display mode to a different measurement using the SELECT button.

The peak inrush current for a unit under test can be measured using this function as follows:

1. Program the output to zero volts and turn off the output using the ON/OFF button.

2. Use the SELECT button to display the present peak current value.

3. Use the SELECT button again to toggle to any other measurement readout. This will effectively reset the peak current sample and hold circuit to zero amps.

4. Use the left shuttle knob to set the voltage to the nominal supply voltage of the unit under test.

5. Use the OUTPUT ON/OFF button to apply the programmed voltage to the unit under test.

6. Use the SELECT button to display the measured peak current value.

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4.3 Setting the Power on Initialization Values

The power supply is shipped with default factory settings when the unit is powered up. The factory settings are:

Parameter Factory default setting

Voltage 0.0 Volt Current limit Maximum available current. Display mode Voltage and Current measurement Output state OFF Local / Remote State Local. Front panel unlocked.

Table 4-1: Factory Default Power on Settings

It is possible to change the power on initialization values in one of two ways:

1. Using the RS232 or optional IEEE-488 interface and the supplied XDSGUI program.

2. Using the front panel.

To change the power on initialization values from the front panel, proceed as follows:

1. Set the unit up in the desired way from the front. (Voltage, current limit, output state, display mode).

2. Press and hold the SELECT key (normally toggles LED display mode).

3. While holding the SELECT key, press the OUTPUT ON/OFF key. This will save the present front panel settings in non-volatile memory register (NVM) no 7 and assign this register as the power on register.

4. Release both keys. Note that as step 2 is executed, the display mode will toggle. This means the display mode after power up is different from how the unit was set up. To avoid this, just toggle the display till one position before the desired power on mode first and then execute steps 2-4.

5. This procedure can be repeated as often as needed by the user.

To change the power on initialization values over the bus, proceed as follows:

1. Set the unit up in the desired way using the relevant bus commands.

2. Save the new setup you want to make the power-on setting to one of the 8 setup registers using the *SAV <n> command. (n = 0 through 7)

3. Assign the register as the Power-on register using the SYST:PON <n> command where <n> is register used in step 2.

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4.4 Operating Modes

The XDS Series can operate in one of two modes of operation, voltage mode or current mode with automatic cross over.

Voltage Mode (CV) mode In this mode of operation, the output voltage of

the DC supply is regulated as long as the current limit set is not exceeded. If the current limit is reached due to the load condition, the DC supply crosses over to constant current mode by reducing the output voltage as needed to maintain the set current limit level.

Constant Current (CC) mode In this mode of operation, the output current of

the DC supply is regulated as long as the voltage set is not reached. If the output voltage reaches the set voltage, the DC supply crosses over to the constant voltage mode by reducing the output current as needed to maintain the set voltage level.

The currently active mode is always indicated by the CV and CC status LED's on the front panel and may also be queried through he remote control interface. The mode can not be changed by the user. It is determined by the load condition and the programmed values for voltage and current limit.

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4.5 Special Features

The XDS Series offers some special features, which are explained in this section

4.5.1 Remote Inhibit / Remote Shutdown

The output of the DC supply can be controlled using a discrete input. This input is available on connecter J22 at the rear panel of the XDS unit.

The Remote Inhibit or Remote Shutdown can be configured over the bus to operate in one of two modes:

RI Mode Description

0 Active Low. A TTL logic low signal level or switch closure between pin 1 and

pin 10 of J22 will DISABLE the output. This will override the front panel OUTPUT ON/OFF button or remote output state. This is the default mode.

1 Active High. A TTL logic low signal level or switch closure between pin 1 and

pin 10 of J22 will ENABLE the output. This will override the front panel OUTPUT ON/OFF button or remote output state.

The SYST:CONF bus command may be used to set the polarity mode for the Remote Inhibit shutdown input. Once set, send the SYST:SAVE command so the new mode is retained at power up.

4.5.2 Bleeder circuit

The DC supply has an amplifier that can source but can’t sink current. Under a no-load condition the output voltage will remain unless there is a provision to bleed the voltage from the storage capacitors across the output terminals. The XDS Series DC supply has a bleeder circuit that when activated will drop the output from its present value to a value closer to zero volts in approximately 150 milliseconds under a no-load condition. Actual times may vary by voltage range model.

This special bleeder circuit will activate when the output voltage is programmed to a value that is 10% lower than its prior voltage setting. For example if the output is set to 80 volts the bleeder will not activate if the voltage is programmed to 75 volts. If it is programmed to 40 volts however, it will activate since 40 volts is more than 10 % less than 80 V. Once activated, the bleeder circuit stays active until the voltage drops to 44 volts (110% of new setting). The bleeder circuit will work with either internal or RPV programming.

4.5.3 Over Voltage Protection (OVP)

The XDS Series offers an over voltage protection mode. This mode protects the power supply from over voltage damage.

The Over Voltage Protection (OVP) is controlled by the voltage measurements and as such reacts to the measured output voltage rather than the programmed value.

When the actual output voltage exceeds the OVP level the controller will disable the output and program the output to zero volts.

When operated from the front panel, the OVP level is fixed at 110% of the available voltage range. When operated over the remote control interface, the OVP trip level can be set by the user

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as a percentage of voltage range. Allowable range is 0 to 110%. Bus operation also allows the OVP mode to be turned on (enabled) or off (disabled).

If the output voltage exceeds the set trip level and the OVP mode is enabled, the power supply will generate a -300, Device specific error and turn off the output. The mode is enabled with the VOLT:PROT:STAT command. The OVP mode provides another level of protection in addition to the volt:high user setting which prevents programming commands or front panel inputs above this level to be accepted.

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5 Model Configurations

5.1 Available Configurations

The XDS controller can be reconfigured for various modes of operation. Generally, the mode of operation is factory set at the time of shipment and is indicated on the model number tag by a configuration option suffix. The following configurations are available.

Configuration Configuration

Option Suffix

Master None Normal mode of operation. A single XDS unit in

Auxiliary -AUX Set to operate as an auxiliary unit to another XDS

Master, remote programming, Voltage

Master, remote programming, Current

-RPV5 Stand-alone mode with voltage controlled by

-RPV10 Stand-alone mode with voltage controlled by

-RPC5 Stand-alone mode with current limit controlled by

Description

either 5, 10 or 15 KW power configuration. Both voltage and current limit are controlled from the front panel or over the bus.

master unit. This allows parallel operation of up to 5 identical XDS units for higher power systems.

The master unit controls auxiliary units. Voltage and current cannot be set from the front panel or over the bus. Measurements are still available however.

external analog DC voltage input signal. Full-scale voltage required 5 VDC input. Current limit can be set from the front panel or over the bus.

external analog DC voltage input signal. Full-scale voltage required 10 VDC input. Current limit can be set from the front panel or over the bus.

external analog DC voltage input signal. Full-scale voltage required 5 VDC input. Voltage can be set from the front panel or over the bus.

Master, remote programming, Current

XDS Series 37

-RPC10 Stand-alone mode with current limit controlled by external analog DC voltage input signal. Full-scale voltage required 10 VDC input. Voltage can be set from the front panel or over the bus.

Table 5-1: XDS Controller Configuration Options

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5.2 Changing Configurations

Factory configured models are pre-configured and calibrated for their indicated mode of operation. If a unit has to be redeployed for a different application than originally purchased for, the XDS unit can be reconfigured in the field.

To do so requires removal of the top cover. This voids the warranty seal and Argantix should be notified to ensure your warranty period remains in effect. Contact support@argantix.com obtain authorization to reconfigure a unit.

All configuration changes are made through a series of jumper of the 5005-720-1 Controller assembly. This assembly is located directly behind the front panel. The jumpers are on the far side of the controller assembly and can be accessed without removing the controller from the XDS chassis.

The figure below shows the located on the controller assembly and jumpers when facing the front of the unit. Note that the top cover has been pushed back about 4 inches.

Figure 5-1: XDS Configuration Jumper Locations

Available configuration settings are shown in the table below.

Configuration W1 W2 W5 W6 W9 W10 W11 W12 W13 W14 W15 W16

Master 1 0 1 0 0 1 0 1 0 0 0 1 Auxiliary (-AUX) 1 0 1 0 1 0 0 0 1 1 0 1 Master, -RPV 0 1 1 0 0 1 0 1 0 0 0 1 Master, -RPC 1 0 0 1 0 1 1 1 0 0 0 1

Table 5-2: Configuration Jumper Settings - Mode

Note: W15 and W16 jumpers settings shown apply to 10 and 15 KW Chassis. For 5 KW models, remove W16.

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TP9

TP6

R44

TP7

TP2

TP1

TP11

R81

W657 8 15

R40 R87 R54

TP5

W4 W3 W2 W1

W16

TP3

R60 R62

W12 W13

R64

W9 W10

W11

R63

TP4

R103R107

W14

J24

TP10 TP8

J25

J1J3

2 1

W12 W13

W9 W10

W11

R63

TP4

R107

R103

W14

J24

TP8

TP10

2 1

J25

R44

W16

TP3

W4 W3 W2 W1

R40 R87 R54 R60 R62 R64

TP7

TP9

W6578 15

TP1

TP5

TP6

TP2

TP11

R81

Figure 5-2: XDS Controller Jumper Locations – Front view, far side of PWB.

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5.3 Stand Alone Configuration

In this mode, a single XDS DC power Supply is operated stand-alone. Power levels from 5 to 15 KW are available in this mode of operation. All settings can be made from the front panel as indicated in chapter 4 or over the bus as covered in chapters 9 through 12.

5.4 Parallel Mode

The XDS DC power supply can be paralleled to provide higher output current. This requires two or more unit of the same model. (Voltage range and power level must be the same). Thus, different XDS model numbers cannot be paralleled.

The parallel mode of operation is only supported on XDS Series II controller models. Older generation XDS models may not support this capability. Older XDS units can be easily identified, as they have no air inlets in the front panel.

5.4.1 Multi box connections

To parallel two or more XDS units, one unit acts as the Master and is used to program the output of all other units. The remaining unit(s) operate in an auxiliary mode. The output bus bars of all units must be tied together. The master’s unit external sense connection must be connected as well.

The master provides the control signal (IMon) for all auxiliary units. This control signal is provided on Auxiliary I/O connector J21 at the rear panel. A DB9 connector is required to This requires the use of a 9 pin D-sub connector. Each auxiliary unit (-AUX) has an analog input on J22. A cable that connects IMon from the master unit to all analog inputs on the auxiliary units is required. Refer to Figure 5-3 for an interconnect cable diagram. A suitable interconnect cable for a two unit parallel system can be order through Argantix customer service department (support@argantix.com

Both the Imon output of the master and the analog input on the auxiliary units are isolated from the DC output of the XDS unit. This means the GPIB or RS232 interfaces can be connected to all units without grounding either side of the DC output.

Refer to Figure 5-5 for a system-wiring diagram of a 2 box, 30 KW XDS system.

Analog I/O

). Specify CI P/N 5005-051-1.

J22

J21

Auxiliary I/O

Shielded or twisted cable

Figure 5-3: Master / Auxiliary Interconnect Cable Diagram

40 XDS Series

XDS MASTERXDS AUXILIARY

User and Programming Manual

Figure 5-4: Parallel Cable Interconnect Accessory

XDS Series 41

User and Programming Manual

XDS 100-150

XDS 100-150-AUX

EQUIPMENT

UNDER

TEST

Figure 5-5: XDS 30KW System Connections

5.4.2 Multi box front panel control

The auxiliary unit(s) (-AUX) cannot be controlled from their respective front panel(s). Instead, they are controlled indirectly through the master XDS unit. The –AUX unit will display read back fro output voltage on the left LED and the selected read back (current, peak current or power) on the right hand side LED. Turning the controls on an –AUX unit will result in a set of four dashes being shown on the readout. This indicates not front panel control is available. After about 2 seconds of releasing the knob, the display will revert back to read back mode.

The Output On/Off key remains active. Generally, it is recommended to leave the output of the auxiliary unit turned on. This can be accomplished at power up using the power on setup register. (Refer to section 4.3).

L1 L2 L3

AC INPUT

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5.4.3 Multi box remote control

Programming of voltage or current limit on auxiliary unit(s) (-AUX) cannot be done. Any attempt to send an output programming command will result in a –200,”Exection Error”. All other commands remain active however, including output on/off and measurement queries. If the output is controlled remotely, the control program should always enable the output of the auxiliary units before enabling the master’s output. The reverse is true for turning the output off.

Voltage measurements need only be done from the master unit. To obtain accurate current and power measurements, it is recommended to query all units and sum the data for total current and power readings. The master chassis of a multi-box system in parallel will not provide aggregate current or power measurements. To obtain these, the user must query the measurements from the master and all aux chassis and sum. Simply multiplying the value measured by the master by the total number of chassis may result in errors due to imperfect sharing.

5.5 RPV Mode

RPV stands for Remote Programming of Voltage. In this mode, the front panel voltage knob is rendered inoperative and an analog input is used to control the output voltage. This mode is available on a Master unit only.

Units configured for auxiliary operation (-AUX) or -RPC cannot be used with RPV. There are two discrete inputs available for RPV mode on connector J22 (DB15) at the rear panel.

Input pin 4 provides a 10VDC range input; input pin 11 provides a 5VDC range input. Both inputs are referenced to pin 14 (ISO COM).

These inputs can be calibrated using adjustment pot R103 but only one adjustment is available for either input so the unit must be calibrated for the required mode of operation.

5.6 RPC Mode

RPC stands for Remote Programming of Current Limit. In this mode, the front panel current knob is rendered inoperative and an analog input is used to control the current limit. This mode is available on a Master unit only.

If the XDS is to be used as a pseudo current source with analog control, the output voltage must be set to a high enough level given the load applied to ensure the XDS operates in Constant Current mode (CC). If the load is such that the set voltage is exceeded, the XDS will revert to constant voltage modes and the current will drop below the set level.

Units configured for auxiliary operation (-AUX) or –RPV cannot be used with RPC. There are two discrete inputs available for RPV mode on connector J22 (DB15) at the rear panel.

Input pin 4 provides a 10VDC range input; input pin 11 provides a 5VDC range input. Both inputs are referenced to pin 14 (ISO COM).

These inputs can be calibrated using adjustment pot R103 but only one adjustment is available for either input so the unit must be calibrated for the required mode of operation.

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6 Principle of Operation

6.1 General

An explanation of the circuits in the DC supply is given in this section. Refer to block diagram in Figure 6-1.

6.2 Overall Description

Referring to block diagram in Figure 6-1 and Figure 6-2, the XDS DC power source consists of one to three high power DC modules, a controller, and a power supply board. The controller assembly uses a standard controller board and an optional GPIB board. An EMI filter is mounted to the rear panel and also serves as the input connection to the three phase AC mains.

The three phase mains is connected at the rear panel and passes through the EMI filter to provide AC power to each DC module and to the power supply board. Over current protection for the AC input is provided by appropriately sized fuses on each module. There is no master switch or circuit breaker, so, as long as mains power is applied to the input, the DC modules and power supply board are powered. A front panel switch enables the DC supply board to put the whole unit in the active state.

The controller, power supply, and each DC module are interconnected with a ribbon cable. This ribbon cable serves as the Supply/Control bus. The low voltage power supplies are directed from the power supply board to the controller and DC modules on this bus. Control signals also pass between all assemblies on this bus. Among other uses, these signals program the output, sense the output voltage, and detect fault conditions.

The standard interface assembly takes signals from the controller board and drives the RS232 connection on the rear panel.

A rear panel analog I/O connection allows remote isolated voltage and current programming of the DC output and remote shut down.

The optional interface assembly (-IF option) provides the GPIB output.

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XDS Series 45

Figure 6-1: DC Power Supply Block Diagram - -IF option shown

User and Programming Manual

46 XDS Series

EMI

FILTER,

3 PHASE

POWER SUPPLY

A11

DC MODULE

A10

DC MODULE

DC CONTROLLER

A B C

GND

3 Phase AC Power Bus

Supply/Control Bus

SELV Supply

J6 J6 J6

J20

RS232

J23

GPIB

J22

ANLG I/O

STANDARD

OPTIONAL

SENSE

VOUT +

VOUT -

AC INPUT

B3B2B1

J12

GPIB

Figure 6-2: XDS DC Supply Simplified Block Diagram

User and Programming Manual

6.3 Bias Power Supply (A7)

The power supply board (A7) uses the three phase AC mains to generate the various low voltage supplies required by the internal control circuits.

Three phase AC mains from the chassis EMI filter feeds the power supply board through one amp fuses. The AC is full wave rectified to feed bulk electrolytic capacitors through surge limiting thermistors. The bulk DC voltage is used by a flyback PWM converter to generate five isolated output windings and a sense winding. The PWM uses the sense winding to power it’s circuitry and regulate all of the outputs. Two of the output windings generate the +/- 19V SELV supply, two of the output windings generate the +/- 19V control supply, and the last output winding generates the +24 VDC supply to power the fans. Each of the five outputs goes through various stages of rectification and filtering, and each is protected by a polymeric fuse.

The +19 V control supply is down regulated by a small converter to create the relatively high current +15 V supply required by the DC module gate drive circuits.

The +24 V fan supply passes through a small variable output voltage converter. The output voltage is controlled between +12 V and +24 V depending on the master DC module output current. This controls the fan speed to reduce audible noise when the module is lightly loaded.

An over voltage, under voltage or phase lost detect comparator monitors the rectified input AC voltage and sends isolated logic signals to the controller if the mains voltage is not within the operating range.

Each of the DC output modules is synchronized to a common frequency, 93.75 kHz. The reference clock is generated from a crystal controlled oscillator on the power supply board. The oscillator frequency is divided down to provide three separate 93.75 kHz references, each separated by 120 degrees of phase from the other two.

The three phase AC mains is always active on the DC output modules and the DC supply board; there is no master switch or circuit breaker. The chassis is turned on or off by a small switch on the front panel. This switch applies or removes power from the DC supply board PWM controller chip. When the power to the PWM chip is removed, the flyback converter stops switching, all the bias supplies discharge to zero, and the complete unit is put in an “off” state.

Both power and control signals are distributed to the power modules and the controller through a 40 pin ribbon cable system interface, P/N 5005-234-1.

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6.4 Power Module (A9 through A11)

Refer to Figure 6-3 for a block diagram of the DC module. The DC module rectifies and filters the AC mains voltage, switches the voltage with a phase modulated full bridge converter, passes the switched voltage through a voltage scaling isolation power transformer, rectifies and filters the output voltage, and directs the voltage to the output via bus bars.

The module mostly consists of the long amplifier board (A4), the small snubber (A5) and output filter (A6) boards, electrolytic filter capacitors on the input and output, power transformer, current sense transformer in the primary path of the power transformer, output rectifiers, and output inductor. Power semiconductors are soldered to the amplifier board to provide various functions. A heat sink provides not only a low impedance thermal path for the module, but also the structural base to which most of the components are mounted.

The AC mains from the three phase AC power bus enters the DC module at E1/E2/E3. The voltage passes through fuses and then a full wave rectifier (CR8-CR13). The DC voltage is filtered and stored on two electrolytic capacitors. The capacitors are configured in parallel for 208 volt mains or in series for 400/480 volt mains. High inrush current to the electrolytics is limited by a resistor. The resistor is shorted out by an SCR, CR14, during module operation.

Note: This bus bar is always live, even if the front panel On/Off switch is in the Off

position. Use extreme cautions when servicing any part of this product.

The rectified/filtered mains voltage provides the high power bus for the H-bridge converter. The converter is phase-shift pulse width modulated using four IGBT’s, Q12-Q15. The 93.75 kHz PWM clock frequency yields a 46.9 kHz frequency from the output of the H-bridge to the primary of the power transformer. A current transformer in the primary wire of the power transformer senses over current situations and is used for protection of the H-bridge.

SUPPLY/

CONTROL

BUS

INPUT BULK

STORAGE

CAPACITORS

E10 E11E4 E5

POWER

TRANSFORMER

MODULE AMPLIFIER

INDUCTOR CURRENT

SENSE

INDUCTOR

OUTPUT

DISCHARGE

E7E6

T-SWITCH

E9E8

OUTPUT

CURRENT

SENSE

VOUT -

VOUT +

48 XDS Series

MODULE

SNUBBER

MODULE

OUTPUT FILTER

Figure 6-3: Power Module Block Diagram

REMOTE

SENSE

User and Programming Manual

The secondary arrangement of the power transformer depends on the output voltage. High voltage output models used a full-bridge arrangement. Low voltage output models use a center-tapped circuit. The latter is shown in Figure 6-3. The snubber board (A5) holds RC snubbers to control voltage spikes on the rectifiers. Circuit arrangement on this board varies per model output voltage. Secondary return current is monitored with a shunt resistor and represents the current in the output inductor. This current sense signal is used by the PWM controller for stability and protection.

The rectified output passes through a large filter inductor, to an electrolytic capacitor, through smaller inductors, and to a final electrolytic capacitor. A shunt in the output return lead senses output current for measurement and current programming. The output filter board (A6) mounts to the electrolytic capacitors. This board holds small filter capacitors and remote voltage sense circuitry. The voltage sense signals are fed back to the CPU controller assembly through the DC module amplifier board.

A thermal switch on the DC module heat sink opens if the monitored temperature is too high. This disables the DC module and is reported by the CPU controller.

A discharge circuit on the DC module amplifier board sinks current from the output electrolytic capacitors to quickly remove charge from the output. The level of discharge depends on the model output voltage and amount of external capacitance added by the user.

Each power module is made up of three PCB's, A4 through A6.

6.4.1 Amplifier Module (A4)

The amplifier module board is located perpendicular to the base heat sink of each power module. This board contains the switching control logic and power devices for both AC-DC and DC-DC stages of the power module.

6.4.2 Snubber Board (A5)

The snubber board is a small board located below the input electrolytic caps on the power board. The snubber board connects directly to the power diodes, which mount on an isolated mounting plate between the transformer and the output inductor.

6.4.3 Output Filer Board (A6)

The output filter board is located in the back of each power module, directly above the output electrolytic caps. One of the three power modules has an output filter board with external sense connector. (5005-700-1) This module is always on the far right of the chassis. The other two power modules (if present) have an output filter board without sense connections. (5005-700-2).

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6.5 Controller Module (A3)

The Controller Module is designated A3. The controller module consists of a single printed circuit assembly that contains both the CPU, measurement circuits, control loop and user controls and indicators. The Controller Module has the circuits to perform the following operations:

1. Generates the output voltage and current reference signals and load regulates the output voltage or current.

2. Allows setting of Voltage and Current from the front panel or the standard RS232C or optional GPIB interface.

3. Measures and displays the output voltage, current, peak current and power.

4. Isolates and routes analog programming signal for Vprog or Iprogr if -IF option is installed.

The controller assembly consists of the DC controller board (A3) and, optionally, GPIB board (A8). Refer to Figure 6-1.

The controller board is the core of this assembly. This board has a micro controller, A/D converters, reference, and logic circuits to program, calibrate, and measure the output of the XDS Power source. Voltage and current error amplifiers control the overall output according to user set values. Sensed voltage and current signals from the DC Output modules feed these error amplifiers and the measurement circuits. This board also holds the switches, rotary pulse generators, LED’s, and seven segment displays at the front panel. An RS232 interface is standard to all XDS models and is part of the controller assembly.

The controller board has a total of 15 jumpers W1 through W15 that determine the mode of operation. Table 8-6, Table 8-7 and Table 8-8 show the valid jumper setting combinations. A "1" indicates the jumper is installed. A "0" indicates the jumper is out. Factory default settings are determined by the configuration option. See section 2.10. To change jumper settings, the top cover has to be removed to gain access. Contact Argantix (support@argantix.com ensure the warranty is not voided. The jumper locations on the back of the controller board are shown in Table 8-6, Table 8-7 and Table 8-8.

Analog Input

The controller board also contains an analog programming interface. This analog input may be used to control either the output voltage (default) or current limit. The desired mode is selected through jumper settings. See section 8.4

Analog Output (Imon)

The controller board also has an analog output signal (Imon), which may be used to drive an XDS unit configured as an auxiliary unit. (-AUX). In this case, the control loop extends to the power modules in the –AUX unit and the voltage and current limit settings of all units can be controlled from the master unit.

6.5.1 Remote Control [Option] Interfaces (A8)

The XDS Series comes standard with an RS232C remote control interface. It can also be outfitted with a GPIB / IEEE 488 interface board. (Option -IF, Assembly A8.

The optional GPIB board (A8) provides a GPIB interface J4 to J23. A micro controller operating from SELV supplies handles the communication between the GPIB connection and the controller board.

) prior to doing so to

The GPIB address for the DC power supply (if installed) is selected by a DIP-switch on the right side of the unit. Only one interface can be active at any given time and must be selected using DIP-switch position 6. (Refer to Figure 9-3: GPIB Address Selection Switch).

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CAUTION

VOLTAGES UP TO 524 V

CERTAIN SECTIONS OF THIS

POWER SUPPLY. THIS EQUIPMENT GENERATES

POTENTIALLY LETHAL VOLTAGES.

DEATH

ON CONTACT MAY RESULT IF PERSONNEL FAIL TO OBSERVE SAFETY PRECAUTIONS. DO NOT TOUCH

AND 600 VDC MAY BE PRESENT IN

ELECTRONIC CIRCUITS WHEN POWER IS APPLIED.

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7 Calibration

Routine calibration should be performed every 12 months. Non-routine calibration is only required if a related assembly is replaced or if the periodic calibration is unsuccessful. All routine calibrations can be performed without removing the top cover (Closed case calibration) through a series of adjustment pots reachable through the top cover. A calibration seal covers the access holes. This seal has to be removed or broken for this purpose.

7.1 Calibration Equipment

Equipment Description

Digital Multimeter (DMM): Two (2) HP 34401A

0.1%, 10 miliohm Current Shunt or

0.1%, 1 miliohm Current Shunt:

Isotek Model RUG-Z-R010-0.1 or equivalent or Isotek Model RUG-Z-R001-0.1 or equivalent

Load Bank: Various power load resistors will be needed

Table 7-1: Calibration Equipment

Model Voltage Range Current Load Resistor

XDS 30-167 XDS 30-333 XDS 30-500

XDS 40-125 XDS 40-250 XDS 40-375

XDS 50-100 XDS 50-200 XDS 50-300

XDS 80-62 XDS 80-125 XDS 80-187

XDS 100-50 XDS 100-100 XDS 100-150

XDS 150-33 XDS 150-66 XDS 150-100

XDS 250-20 XDS 250-40 XDS 250-60

XDS 300-17 XDS 300-33 XDS 300-50

XDS 400-12 XDS 400-25 XDS 400-37

XDS 600-8 XDS 600-17 XDS 600-25

30 167 A

333 A 500 A

40 125 A

250 A 375 A

50 100 A

200 A 300 A

80 62 A

125 A 187 A

100 50 A

100 A 150 A

150 33 A

66 A

100 A

250 20 A

40 A 60 A

300 17 A

33 A 50 A

400 12.5 A

25 A

37.5 A

600 8.33 A

16.67 A 25 A

0.18

0.09

0.06

0.32

0.16

0.107

0.50

0.25

0.167

1.29

0.64

0.428

2.0

1.0

0.667

4.545

2.273

1.5

12.5

6.25

4.167

17.647

8.823 6

32 16

10.67

72 36 24

52 XDS Series

Table 7-2: Load Resistors and Current by model

User and Programming Manual

7.2 Routine Calibration

Equipment Setup:

Connect the required test equipment to the power supply as shown in Figure 7-1. The DMM can be connected to the common output bus bar at the rear of the unit.

Never connect the load wire to the SENSE terminal at the Rear Panel terminal strip. The load must be connected to the POWER bus bars. The external sense input of the DC supply must be connected at the same point as the DMM used to measure voltage. The DMM used to measure current must be connected across the reference shunt. Make sure the LO side of both DMM's is connected to the negative bus bar.

POS. NEG.

SHUNT

DC SUPPLY (rear view)

CURRENT

Measure output voltage at sense connection.

VOLTAGE

Figure 7-1: Test Equipment Hookup for Routine Output and Measurement Calibration

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Adjustment Locations:

All adjustments are made manually on the XDS series using pots. The adjustment pots can be accessed through opening at the front of the top cover.

Figure 7-2: Calibration Adjustments

The following tables provide a reference of the adjustment pots accessible without removing the top cover. If the XDS unit is mounted in a cabinet system, it may be necessary to pull it forward by a few inches to access the front part of the top cover where the adjustment pots are located. Always use caution when sliding the unit out of a cabinet, as its weight must be properly supported.

Reference Parameter Type

R40 Output Voltage Full Scale R44 7.4 VDC Reference Normalization R54 Voltage Measurement Full Scale R60 Current Measurement Offset R62 Current Measurement Full Scale R63 Current Limit Full Scale R64 Peak Current Measurement Full Scale R81 Volt Measurement Offset R87 Output Voltage Offset

R103 Analog Programming Input

Full Scale

(J22 pin 4 and J22 pin 11)

R107 Current Limit Offset

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Table 7-3: Calibration Adjustment Reference by number

The adjustment pots are located from left to right (R44 R81 R40 R87 R54 R60 R62 R64 R63, R107, R103) standing in front of the XDS unit as shown in Table 7-4.

L to R Parameter Type Reference

1 PRV Analog input (option) Normalization R44

(do not adjust) 2 Volt Measurement Offset R81 3 Output Voltage Full Scale R40 4 Output Voltage Offset R87 5 Voltage Measurement Full Scale R54 6 Current Measurement Offset R60 7 Current Measurement Full Scale R62 8 Peak Current Measurement Full Scale R64 9 Current Limit Full Scale R63

10 Current Limit Offset R107 11 Analog Programming Input (J22

pin 4 and J22 pin 11)

Table 7-4: Calibration Adjustment Reference by location left to right

7.2.1 Output Voltage Calibration

Offset Calibration

a) Set programmed voltage to 5% of full-scale voltage by using the Voltage Knob. b) Adjust R87 until DVM output voltage reading matches the set voltage as closely as possible.

Full Scale Calibration

a) Set programmed voltage to 90 % of full scale voltage value b) Adjust R40 until DVM reading equals the set voltage as closely as possible.

7.2.2 Measurement Calibration

Voltage Measurement Offset Calibration

a) Set programmed voltage to 1 % of full scale b) Adjust R81 until output voltage measurement on front panel equals DVM reading

Voltage Measurement Full Scale Calibration

Full Scale R103

a) Set programmed voltage to full scale value b) Adjust R54 until output voltage measurement on front panel equals DVM reading

Current Measurement Offset Calibration

a) Set programmed load current to 1% of full load b) Adjust R60 until output current measurement on front panel equal Shunt output current

reading.

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Current Measurement Full Scale Calibration

a) Set programmed load current to 90 % of full load b) Adjust R62 until output current measurement on front panel equal shunt output current

reading.

Peak Current Measurement Full Scale Calibration

a) Set programmed output current to full load b) Adjust R64 until unit peak current measurement on front panel equals output current reading.

7.3 Non-Routine Calibration

7.3.1 Current Limit Calibration

This calibration procedure sets the current limit trip point at the right current level. To perform a current limit calibration, proceed as follows:

Offset Calibration

a) Apply load and set voltage to full scale, current limit to 2% of range b) Adjust R107 until DVM output current reading matches the set current level as closely as

possible.

Full Scale Calibration

a) Set programmed output current to full scale b) Adjust R63 until the DC supply starts going into current limit.

7.3.2 Analog Input Calibration

This calibration is performed at the factory only and should not be done by the end user unless the controller mode has been field reconfigured.

To adjust the analog input calibration, use pot R103.

RPV Adjustment

For RPV mode, use a DVM to determine the output voltage while applying a DC input level from a small, low noise DC reference supply. Apply some load when performing this calibration.

RPC Adjustment

For RPC mode, a load sufficient to draw 90% of available current is required. Full power is not needed so a lower voltage than full scale can be used to perform the analog current full scale calibration.

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7.3.3 Current Sharing Calibration on Multi-box Systems

Systems consisting of multiple XDS units in parallel may require periodic checking and adjustment of the current sharing. If a system was shipped configured from the factory, the current sharing was set at the time of shipment. Systems that are configured in the field using XDS units that were not originally factory configured as such, must be be checked and adjusted as needed. This section covers the required adjustment procedure.

This test makes adjustments to all Auxiliary power sources used in a multi-box power system. The test is done with the assumption that all measurement calibrations have been performed on all power sources used in the system. The load for the parallel power system must be derived from Table 7-2. In order to derive the resistance needed for the load find the load resistance value for a 15 KW OUTPUT. Multiply this value by the factor 15/(total power in KW). This value will be the full-load resistance value.

For example if the power system has an 80 volt range and the total system power level is 25 KW the full-load resistance is: (15/ 25) X 0.427 = 0.256 ohms.

Proceed as follows:

1. Connect the analog cable, 5005-051-1, between the Master power source and each Auxiliary power pin11 source. J21 of the Master must connect to J22 of the Auxiliary Source. J21 pin 2 of the Master source must connect to J22 pin 14 of each Auxiliary source. J21 pin6 of the Master source must connect to J22 of each Auxiliary source.

2. Configure the auxiliary unit’s controller if it is not already set for –AUX configuration. In each Auxiliary power source remove jumper W12 and install jumper W13 and W14 on the 5005720 controller board. Note, if the intended –AUX unit has a P/N 5005-708-1 controller board, it does not support parallel operation.

3. If the total system power is 45 KW or more install jumper W15 on the Master Controller board. W16 should already be installed.

4. Connect the outputs of all of the power sources in parallel. Use adequate wire sizes. Connect a suitable current shunt in series with each unit so the current delivered by each unit can be monitored individually. If suitable current shunts are not available, the internal current read back of the XDS units may be used instead provided the current measurement calibration of each XDS unit has been verified beforehand.

5. Apply the full-load resistance value derived above. Make sure the load is rated for the power level that will be dissipated.

6. Turn on the line power first for the Master power source followed by each Auxiliary source.

7. Apply the output of each Auxiliary source followed by the Master source. Make sure that the output voltage stays at a low value, less than 0.5% of full-scale voltage, after each Auxiliary source has the output applied.

8. Note: If the Master and Auxiliary power sources are not of the same model (same number of amplifiers) a constant, R, must be determined for the full-scale current tracking of the Auxiliary power source. R = (Auxiliary maximum current)/ (Master maximum current) For most power systems the model number of the Master and Auxiliary will be the same to the value of R will be equal to 1. This would mean the current delivered by the sources should be the same.

9. The full-load current from each Auxiliary source should match the full-load current delivered by the Master within 5%. The current delivered by each Auxiliary source must match the current delivered by the Master times the constant R. For example if the constant is 2/3 when the Master is delivering 100 amps the Auxiliary with the constant R should be delivering

66.66 amps. In order to make this adjustment slowly increase the output voltage of the Master source while observing the load current supplied by each Auxiliary source. The

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Auxiliary sources will not precisely track the current of the Master (the Master current times the value of R) at the lower values of current. Increase the voltage until the total load current of the power system is equal to the maximum current of the Master power source. Use R103 in each Auxiliary source to adjust the load current contributed by the Auxiliary source equal to that of the Master source times the value of R for the individual Auxiliary power source.

10. Increase the voltage for the full-load current. Record the total and the amount of current supplied by each source. Adjust R103 if necessary to balance the currents. Remove the load to check the load regulation.

Configurations with more than 2 XDS units.

Follow this procedure for each of the –AUX units in the parallel system configuration. For systems with more than one –AUX unit, it may be necessary to adjust each unit in turn until they all share within stated tolerances.

Example

The following is an example of the parallel adjustments of a 2-box power system:

Master power source: XDS100-150 Auxiliary power source: XDS100-100

In step 8, the value of R will be 0.6666 In step 8, when the total system current is 100 amps, the maximum current rating of the lowest power

source, the Auxiliary source must be adjusted with R103 to 40 amps at the same time the Master is delivering 60 amps (60 x .6666 = 40 amps)

In step 9, R103 in the Auxiliary should be adjusted to 100 amps when the Master is delivering 150 amps.

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8 Service

8.1 General

This section describes suggested maintenance and troubleshooting procedures. The troubleshooting procedure is divided into two sections. The first section deals with basic operation and connection of the equipment. The second section requires opening the unit and using the LED indicators and a simple multi meter to troubleshoot the unit down to the module level. Only a qualified electronic technician should attempt this level of troubleshooting.

8.2 Basic Operation

Table 8-1: Basic Symptoms

PARAGRAPH PROBLEM

8.2.1 Poor Output Voltage Accuracy

8.2.2 Poor Output Voltage Regulation

8.2.3 No Output and no lights on front panel

8.2.4 No output but “Display” on front panel is on

8.2.5 Error -300

8.2.6 Can’t program DC supply on GPIB or RS232

8.2.1 Poor Output Voltage Accuracy

If the power supply exhibits poor programmed voltage accuracy, the following item may be at fault:

Table 8-2: Poor Output Voltage Accuracy

CAUSE SOLUTION

The calibration is incorrect. Calibrate the output.

8.2.2 Poor Output Voltage Regulation

If the AC Power supply exhibits poor voltage regulation the following item may be at fault:

Table 8-3: Poor Output Voltage Regulation

CAUSE SOLUTION

The Remote Sense lines are not connected at the same point monitored by the external voltmeter used for load regulation check. The External voltage sense connection is open.

Connect DC voltmeter to Remote Sense lines on the Rear Panel Power Output terminal strip.

Check the sense connections. Make sure not to reverse the sense polarity or damage to the unit may occur.

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8.2.3 No Output and No Lights on Front Panel

Table 8-4: No Output and No Lights on Front Panel

CAUSE

Front panel power switched off. Switch the breaker on. No input power to the input connector. Ensure correct input power. Blown fuse. Check fuses on the DC bias power supply

8.2.4 No Output but “Display” on Front Panel is On

CAUSE

“OUTPUT ON” switch is turned off. Turn OUTPUT ON switch to “ON”. Current limit programmed down or to zero. Program current limit higher. Voltage programmed down or to zero. Turn amplitude control up. Remote Inhibit Input is active Remote Inhibit (On/Off) input on rear panel

Controller configuration lost. Evident by inability to set voltage or current to any other value than 0.

Table 8-5: No Output But "Display" Is On

SOLUTION

and replace with same type and rating. See Figure 7-2.

SOLUTION

connector J22 is pulled up or down. This renders the Output On/Off button inactive. The polarity of the Remote Inhibit input is determined by the SYST.CONF command. See sections 3.3 and 4.5.1 for details. If the controller encounters an incorrect configuration check sum at power up, it defaults to a "SAFE" state by setting the voltage and current range to 0 V and 0 A. The unit is inoperative in this state until the configuration data is reset. This requires the use of the RS232C interface. Contact factory for assistance.

8.2.5 Error -300

Error -300 indicates a device specific error. It is usually associated with an over power, over temperature, sense wiring or AC line input condition. An Error -300 will result in the output being turned off and the voltage set to 0 V. To recover from an Error -300, the voltage must be programmed up and the output turned back on after the error condition has been removed.

CAUSE

Internal heat sink temperature is too high. Operate power supply between 0 and Fans or ventilation holes are blocked. Remove obstructions.

Fans not working. Check DC bias supply (A7) and

The output is overloaded. Remove the overload.

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SOLUTION

40C.

connection cable harness for DC fans. If +24 VDC is present at fan terminals and fans don’t' turn, replace fans.

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CAUSE

AC input line outside operating limits Verify correct AC input voltage is applied. AC input phase missing Check the AC input line to make sure all

Sense connection Fault Check for reversed polarity sense or

8.2.6 Can’t Program on GPIB or RS232

If the power supply does not respond to RS232C or GPIB programming, the following items may be at fault:

CAUSE

The power supply unit address is incorrect. The RS232C interface has been used and the DC supply has not been powered down since.

No terminator is sent with each command. The XDS Series expects a LineFeed (LF

GPIB or RS232 cable is loose at power supply rear panel. RS232 has failed. Incorrect cable is used. Cable must be

GPIB Assembly has failed. Replace the GPIB Assembly.

SOLUTION

three phases are present. shorted sense connections. If the sense

wires have been reversed and the output turned on, damage may have occurred to the sense board. Contact service if the unit no longer functions with proper sense connections restored.

SOLUTION

Update address. See section 9.4 Note that on the XDS Series DC Supply,

only one interface can be active at one time. If the RS232C interface is used, the GPIB interface is automatically disabled until the power is cycled. Also check the RS232C/GPIB selection switch setting on the address DIP switch. See section 9.4.

or Hex 0A) as a message terminator after each command string. Check connection, tighten jackscrews.

straight through 9 pin D to 9 pin D to PC RS232C port. Check correct baud rate setting in application program if it is user controlled. DC Supply interface is fixed at 19200 baud, 8 bits, 1 start, 1 stop bit.

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8.3 Module Removal

Figure 8-1 shows the location of the internal modules and assemblies.

Figure 8-1: Assembly Location

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8.3.1 Controller Module Removal / Replacement

The warranty seals on the power supply have to be broken for the following procedure. Contact Argantix customer service through email at support@argantix.com to obtain permissions to do so to avoid voiding the product warranty.

If a fault is found that requires the replacement of the Controller Module (Assembly A3) follow the following steps and refer to Figure 8-1 for the module locations:

1. Turn off the front panel On/Off switch. Remove any input power from the rear panel terminal block by disconnecting or unplugging or otherwise disconnecting the AC input.

2. Allow time for any caps to discharge. This may take several minutes.

3. Remove the top cover.

4. Remove the screws along the bottom of the front edge that hold the front panel to the chassis.

5. Remove the two nuts in the top corners of the front panel that hold the front panel to the chassis.

6. Disconnect the system interface (40 pin) ribbon cable from the controller and disconnect the power ribbon cable (10 pin). You can now remove the front panel assembly from the chassis.

7. Place the front panel assembly on a static free work surface.

8. Remove the two front panel knobs. Requires a small Allen wrench.

9. Remove 5 screws that hold the controller PCB assembly to the front panel. The controller assembly can now be removed.

10. Any new controller that is installed must be correctly configured for the Voltage and Current ranges of the XDS model. The voltage and current limits and the serial number stored in the NVM configuration data of the controller must also be set correctly using the RS232C interface. The XDSGUI may be used for this purpose if the authorized password is known. For correct jumper settings, see section 8.4.

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8.3.2 Power Module Removal / Replacement

If a fault has been found that indicates the failure of the amplifier module (Assembly A9 through A11), check the condition of the AC line input fuses on each of the power modules. before replacing the amplifier. Refer to Figure 8-1 for the location of the fuse.

If it is determined that the amplifier module must be replaced, perform the following procedure:

1. Turn off the input circuit breaker.

2. Disconnect all AC input power at the rear panel. Allow any capacitors to bleed down.

3. Remove the power supply top cover by removing (13) #6-32 x 5/16” FLH screws.

4. Remove the module interface cable that connects the modules to the Bias Supply and the controller to clear the EMI shield. Then remove the EMI shield.

5. Remove the (2) #6-32 x 1” screws and lock washers that hold the amplifier module at the rear panel.

6. Disconnect the 40-pin ribbon system interface cable that connects all power modules along the top and then remove the EMI shield. If any cables run across the top of the EMI shield, they may have to be unplugged at the controller as well.

7. Remove the horizontal AC input power bus bars that run across the top of the three power modules.

8. Remove the fan in front of the power module that needs to be removed.

9. Remove the screw at the front of the heat sink that holds the power module to the chassis.

10. Remove the amplifier by pulling it away from the rear panel and lifting it up and out of the chassis.

11. The amplifier may be replaced by following this procedure in reverse order.

12. Check the amplifier AC fuses located on the front of the power module PCB (A4), and replace it if necessary.

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8.4 Controller Jumper Settings

The XDS controller has a number of configuration jumpers. These jumpers are normally factory set but there may be situations when the jumper settings have to be changed. Specifically, under the following circumstances:

1. Adding one or more 5 KW power modules to an existing 5 KW or 10 KW unit.

2. Changing the operation of the controller from internal Volt or Current programming to Analog Input Volt or Current programming or for parallel mode. See also chapter 5.

To change jumper settings, the unit has to be powered down and completely disconnected from AC mains to ensure safety. This change should only be made by qualified personnel experienced with working on high power electronic test equipment. The warranty seals on the power supply have to be broken to remove the top cover. Contact Argantix customer service through email at support@argantix.com voiding the product warranty.

The following table shows the correct jumper configurations. Configurations not shown should be avoided as they may render the unit inoperative. The controller board has a total of 15 jumpers W1 through W15 that determine the mode of operation. Table 8-7 through Table 8-8 shows all valid jumper setting combinations. A "1" indicates the jumper is installed. A "0" indicates the jumper is out. To change jumper settings, the top cover has to be removed to gain access. Contact Argantix prior to doing so to ensure the warranty is not voided.

to obtain permissions to do so to avoid

The jumper locations on the back of the controller board are shown in Figure 8-2. The view is projected from the front, looking down on the back of the 5005-720-1 controller assembly on the front panel. Note that W15 must be installed for parallel systems of 35KW or higher.

Configuration W1 W2 W5 W6 W9 W10 W11 W12 W13 W14 W15 W16

Master 1 0 1 0 0 1 0 1 0 0 0 1 Auxiliary (-AUX) 1 0 1 0 1 0 0 0 1 1 0 1 Master, -RPV 0 1 1 0 0 1 0 1 0 0 0 1 Master, -RPC 1 0 0 1 0 1 1 1 0 0 0 1

Table 8-6: DC Controller Configuration Jumper Settings - Mode

Output Power W3 W4 W7 W8

5 kW 0 0 0 0 10 kW 1 0 1 0 15 kW 1 1 1 1

Table 8-7: DC Controller Jumper configurations - Power Level

OVP Mode W9 W10

OVP in % of V Range 0 1

OVP in % of V Setting

Table 8-8: DC Controller Jumper configurations - OVP mode

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TP9

TP6

R44

TP7

TP2

TP11

R81

TP1

W657 8 15

R40 R87 R54

TP5

W4 W3 W2 W1

W16

TP3

R60 R62

W12 W13

R64

W9 W10

W11

R63

TP4

R103R107

W14

J24

TP10 TP8

J25

J1J3

2 1

R44

W12 W13

W9 W10

W11

R63

TP4

R107

R103

W14

J24

TP8

TP10

2 1

J25

TP6

TP7

TP2

TP11

R81

W6578 15

TP9

TP1

TP5

W16

TP3

W4 W3 W2 W1

R40 R87 R54 R60 R62 R64

Figure 8-2: XDS Controller Jumper Locations – Front view, far side of PWB.

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8.5 Replaceable Parts

In order to ensure prompt, accurate service, please provide the following information, when applicable for each replacement part ordered.

a. Model number and serial number of the instrument. Specify any configuration option such as –LC

if present as this may affect the replacement part or module required.

b. Part number for the sub-assembly where the component is located. c. Component reference designator if applicable (REF #) d. Component description. All replaceable part orders should be addressed to:

Argantix

Attention: Customer Service 9689 Towne Centre Drive San Diego, California 92121-1964 United States of America

Orders may also be placed using fax number: 1 858 677 0904 or email to support@argantix.com

REF # PART # DESCRIPTION VENDOR QTY

1 5005-720-1 PC Assy, Controller CI 1 2 5005-709-3 PC Assy, GPIB (-IF option) CI 1

3 5005-703

5005-723 4 5005-702 PC Assy, Power Module2 CI 1 - 3 5 5005-700-1 PC Assy, Output Filter w Sense CI 1 6 5005-700-2 PC Assy, Output Filter w/o Sense CI 0 - 2 7 241182 Fan, 4, 24 VDC EBM W2G110

8 270212 Fuse, Bias Supply, 600 V, 1A Bussman KTK1

208 V Input Models (-208)

250753 PC Assy, EMI Filter, 90 A, 250 V Tri-Mag SF1819 1 Fuse, Power Module, 600 V, 30A Bussman KTK30

400 V Input Models (-400)

250763 PC Assy, EMI Filter, 57 A, 440 V Tri-Mag SF1812 1 Fuse, Power Module, 600 V, 20A Bussman KTK20

PC Assy, Bias Supply - or PC Assy, Bias Supply

CI 1

EBM 4214H

Comair MS24B3

LittleFuse KLK1

LittleFuse KLK30

LittleFuse KLK20

1 - 3

3 / Mod

Note that power modules used in XDS units with the –LC option have different output capacitor

components. See Table 8-10.

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REF # PART # DESCRIPTION VENDOR QTY

480 V Input Models (-480)

250762 PC Assy, EMI Filter, 45 A, 480 V Tri-Mag SF1811 1 Fuse, Power Module, 600 V, 15A Bussman KTK15

LittleFuse KLK15

Table 8-9: Replaceable Parts

Output filter board capacitor part numbers for a 5 KW DC power module.

Model Standard Power Module -LC Option

30 V 2 x 22000 uF (P/N 611437) 2 x 5600 uF (P/N 611435) 40 V 2 x 15000 uF (P/N 611436) 2 x 3900 uF (P/N 611422) 50 V 2 x 12000 uF (P/N 611441) 2 x 3900uF (P/N 611422)

80 V 2 x 3900 uF (P/N 611422) 2 x 1500uF (P/N 611439) 100 V 2 x 2200 uF (P/N 611438) 2 x 470uF (P/N 611440) 150 V 2 x 1500 uF (P/N 611439) N/A 250 V 2 x 560 uF (P/N 611472) N/A 300 V 2 x 470 uF (P/N 611440) N/A 400 V 2 x 330 uF (P/N 611449) N/A

3 / Mod

600 V 4 x 220 uF (P/N 611445) N/A

Table 8-10: Power Module Output Capacitance

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Figure 8-3: Replaceable Fuse Locations

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9 Remote Control

9.1 Introduction

The XDS Series comes standard with an RS232C serial interface on the rear panel. It can optionally be furnished with an IEEE-488 / GPIB interface at the time of purchase. The GPIB interface is part of the -IF option.

Units are shipped with the Argantix Graphical User Interface program - XDSGUI. This Windows™ program provides a soft front panel to the instrument when connected to a PC through the RS232C or IEEE-488 interface. Additional benefits are obtained from using the PC as a control interface. Some of these benefits include the ability to store measurement data to disk and produce output transients to simulate DC supply conditions.

The XDSGUI is a Windows™ program and as such requires a PC capable of running Windows 98™, or Windows NT/2000/XP. For best performance, a Pentium based PC is recommended.

Complete information on how to use the XDSGUI can be found in the on-line help supplied with the program. Use the Help menu or press on any of the many Help keys located in all program windows for an explanation of the relevant screen or function.

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Figure 9-1: XDSGUI Main screen

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9.2 XDSGUI Program Requirements

To successfully install and operate the XDSGUI program, you will need the following equipment: Argantix XDS Series DC power supply.

PC capable of running Windows 98™ , Windows 2000 or Windows XP

 RS232C communications port  RS232C serial cable (supplied with the product.)

 If option -IF (GPIB) is installed, a National Instruments IEEE-488 Controller Card

Note: The XDSGUI can be run in the absence of a DC power supply. If no DC supply is

available, the XDSGUI can be operated in a simulation mode. The program will detect these conditions and start up in simulation mode after notifying the operator. Measurements in this case will be simulated and should not be used for any analytical purpose.

9.3 RS232C Interface

A suitable cable to connect the power supply to a 9 pin PC-AT style serial port is supplied with the power supply.

The XDS Series expects a LF (Hex 10) terminator at the end of each string sent over the RS232C interface. If the programming environment you use to develop test programs does not append a LF terminator to each output string, the XDS Series will not respond. This may be the case for programs like LabView™ using VISA drivers.

9.3.1 Serial Communication Test Program

The following sample program written in Quick-BASIC can be used to check communication to the XDS Series Power supply over the RS232C serial interface. The interface is optional and must be installed for this to work.

'Argantix RS232C Communication Demo Program '(c) 2002 Copyright California Instruments, All Rights Reserved ' 'This program is for demonstration purposes only and is not to be 'used for any commercial application '================================================================ 'Function and Subroutine Declarations DECLARE FUNCTION retstring$ ()

'================================================================ 'MAIN PROGRAM CODE '================================================================

'OPEN COM2. Replace with COM1, COM3 or COM4 for Com port used 'The input and output buffers are set to 2K each although 'this is not required for most operations.

OPEN "COM2:19200,n,8,1,BIN,LF,TB2048,RB2048" FOR RANDOM AS #1 LEN = 1 CLS PRINT "**** INTERACTIVE MODE ****" 'Enter and endless loop to accept user entered commands DO

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INPUT "Enter Command ('quit' to exit)--> ", cmd$ IF cmd$ <> "QUIT" AND cmd$ <> "quit" THEN IF cmd$ <> "" THEN PRINT #1, cmd$ + CHR$(10); END IF IF INSTR(cmd$, "?") THEN PRINT "Power supply query response = "; retstring$ END IF 'Check for Errors after each command is issued PRINT "Sending non-query syntax check *ESR?" 'On fast PC's we may have to hold off between commands FOR t = 0 TO 1000: NEXT t PRINT #1, "*ESR?" + CHR$(10); esr% = 0 'Clear last error 'Mask off bits 5,4,3,2 only. Other bits are not used. esr% = VAL(retstring$) AND 60 'Process esr% value for error bits IF esr% AND 4 THEN PRINT "*** Query Error Reported by power supply ***"

END IF IF esr% AND 8 THEN PRINT "*** Instrument Dependent Error Reported by power supply ***" END IF IF esr% AND 16 THEN PRINT "*** Command Execution Error Reported by power supply ***" END IF IF esr% AND 32 THEN PRINT "*** Command Syntax Error Reported by power supply ***" END IF 'Clear ERR. -XXX Message from front panel if any error occurred IF esr% <> 0 THEN PRINT #1, "*CLS" + CHR$(10); END IF END IF LOOP UNTIL cmd$ = "QUIT" OR cmd$ = "quit" 'Close COM port on exit CLOSE #1 END '================================================================

FUNCTION retstring$ 'This function returns a response string from the XDS Series 'power supply. The QBasic statement LINE INPUT cannot be used 'as the XDS Series does not return a CR <13> after a response 'message. The LINE INPUT function waits for a CR before 'returning a string. The P Series returns a LF <10> instead 'so we need to poll each returned character for a LF to 'assemble the response string. The COM port needs to be 'opened AS random with a record length of 1 for it to support 'this function. Also, the device number is assumed to be #1 'Optionally, this value could be passed as a parameter to 'make this program more generic.

DIM char AS STRING * 1 DIM resp AS STRING char = "" resp = "" DO char = INPUT$(1, #1) resp = resp + char LOOP UNTIL char = CHR$(10) 'Return result retstring = LEFT$(resp, LEN(resp) - 1)

END FUNCTION

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9.4 Optional IEEE Interface

The XDS Series can optionally be equipped with an IEEE-488 interface in addition to the standard RS232C interface.

Figure 9-2: Rear Panel View

The IEEE address of the XDS DC Supply is set using the DIP-switch at the right side of the unit. (When facing power supply from the front). The switch is located on the controller board (A1) and visible through the side air intake openings. Switch position 4 through 0 corresponds to bits 4 through 0 of the IEEE address. The desired interface is selected by moving DIP-switch position 5 to the correct mode. Only one interface can be active at a time.

Note: Always turn off the power supply and disconnect AC input power when

changing this DIP setting. Use a non-metallic object to change switch positions for the Address.

Figure 9-3: GPIB Address Selection Switch

 The dark section represents the switches.  The above configuration would cause the unit to be in GPIB mode at address 10.  Listen only mode is not supported and this switch must be in the up position (Listen Only mode

OFF) to work properly.

Note: Switch setting changes do not take effect until power is cycled.

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9.5 XDSGUI Installation

This section covers installation of the XDSGUI from the distribution disk to the user’s PC. Make sure the PC is capable of running Windows.

9.5.1 Connecting to the PC Using RS232

Connect the power supply to the PC using an RS232C cable. The power supply RS232C port settings are set as follows: Baud rate: 19200 baud

Data bits: 8 Stop bits 1 Parity bits: none Handshake: Hardware

The power supply source is configured to accept the above setting.

9.5.2 Connecting to the PC Using the optional IEEE-488/GPIB interface

Connect the power supply to the PC using an IEEE-488 interface cable. A National Instruments GPIB controller card is required to use the XDSGUI program.

Make sure the IEEE-488 interface is selected by checking the DIP switch on the side of the unit. It should be in the IEEE-488 position. (See section 9.4).

Set the desired IEEE address using DIP switch position 4 through 0 on the rear panel. (See section

9.4).

9.5.3 Installing the XDSGUI Software

The XDSGUI software is distributed on CD-ROM. The XDSGUI must be installed from CD using the included setup program as all required files are compressed. To install the XDSGUI, proceed as follows:

1. Turn on the PC and boot up in Windows™

2. Iinsert the CD in your CD-ROM drive.

3. Run the Setup.exe program from the root directory of the CD.

4. A CD Browser like program will open. Select the product series for which you want to install the software and select the GUI Software tab. Select an available operating system (typically 32 bit Windows) and click on the Install button to begin the installation.

5. Follow the instructions provided by the setup program to complete the installation.

6. When the installation has completed, remove the CD ROM and store in a safe place.

If prompted to do so, reboot the PC to activate the new settings. You are now ready to start using the XDSGUI software.

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9.6 Trouble Shooting - RS232C

This section provides guidelines for resolving communication problems that may occur when using the XDSGUI software under Windows.

You may encounter problems when using the serial interface with the XDSGUI program that is supplied with the interface option for this source.

Symptoms:

1. Unable to verify connection to the power supply through RS232C interface. Time-out occurs and dialog box appears that asks if you want to switch to simulation mode. An error message (ERR -

100) may appear on the front panel LED’s of the power supply.

- Or -

2. Verification is successful but slewing of voltage or current limit results in an ERR -100.

Things to check first:

1. Is any PC com port available for communication with the power supply? On older PC’s com port interrupts are often shared between com 1 and com3 as well as com2 and com 4. If any of these other com ports is in use, it may prevent you from using the com port that shares the same interrupt.

2. Did you use the RS232C cable that was supplied with the power supply? If not, make sure you obtain the correct cable. (DB9 to DB9, straight through, male to female).

Resolution for Symptom 1

The XDS Series of power supplies require hardware handshaking to control data flow from the PC to the Power supply. After receiving a command, the power supply asserts the DTR line to hold off further communication from the PC until the command just sent has been processed. Under Windows, it is possible to use a 16 byte transmit buffer if a 16550 UART is present. This FIFO exceeds the length of most Power supply commands. When enabled, this mode may result in more than one command being placed in the UART output buffer. If this happens, the handshake from the Power supply will not prevent the content of this buffer being sent to the Power supply and thus will result in more than one command being sent to the Power supply.

To resolve this problem, the UART FIFO length needs to be reduced or disabled altogether. The procedure to disabled the FIFO mode is outlined in the next paragraph.

Note: If turning off the UART FIFO conflicts with other applications that need to run on the same PC using the same COM port, this solution may not be acceptable. In this case, skip this step and proceed to the second symptom resolution, which relies on a software implemented hold-off instead of turning off the FIFO buffer.

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Procedure

1. Make sure the XDSGUI program is closed and no device is using the com port in use.

2. From the Windows desktop, right click on the “My Computer” icon which is located in the top left corner of the screen.

3. From the popup menu, select the “Properties” entry.

4. This brings up the System Properties dialog box

5. From the tabs shown at the top of the dialog box, select the “Device Manager” tab.

6. The relevant screen is shown in Figure 9-4.

7. Expand the Ports(COM&LPT) tree selection by clicking on the ‘+’ sign

8. Select the COM port you plan to use to communicate with the P or XDS Series power supply.

9. With the correct COM port selected, click on the Properties button at the bottom left of the dialog box.

10. This brings up the settings dialog box for the COM port. In this example, COM2 is used.

11. From the tabs at the top of the dialog box, select the “Port Settings” tab.

12. This should bring up the dialog shown in Figure 9-6.

13. Next, select the Advanced button to bring up the advanced port settings dialog box shown in Figure 9-5.

Figure 9-4: System Properties Dialog Box

Figure 9-5: Advanced Port Settings Dialog Box

14. At the top of the dialog box, disable the “Use FIFO buffers (requires 16550 compatible UART)” checkbox. This will bypass the UART FIFO’s and enable the hardware handshake to work correctly. If the FIFO cannot be turned off, set the Receive buffer to max (14) and the Transmit buffer to min. (1).

Figure 9-6: COM Port Properties Dialog Box

15. Click on the all OK buttons to close all dialog boxes that remain open.

16. This should enable the XDSGUI to work correctly.

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Resolution for Symptom 2

Execute the suggested procedure to resolve symptom 1 first. If an occasional error continues to occur while slewing the voltage or frequency slider controls in the XDSGUI program, increase the command delay paramter located in the System, Interface dialog. The default value for the CmdDelay is set to 30 and is displayed below the command line of the Interface window. Change this value to 40 by entering the new value from the keyboard.

Try to connect again. You may have to cycle the power on the power supply if it still shows the Err 100 display.

Higher values than 40 may be set for the CmdDelay parameter if this fix does not resolve your problem.

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9.7 Trouble Shooting - IEEE-488 / GPIB

This section provides guidelines for resolving communication problems that may occur when using the power supply with or without the XDSGUI software with a IEEE-488 / GPIB interface.

Symptoms:

1. Unable to verify connection to the power supply through IEEE-488 interface. Time-out occurs any time an attempt is made to verify connection.

Things to check first:

1. Is the interface option set to use the IEEE-488 interface instead of the RS232C interface? The DIP switch on the right side panel of the power supply is used to select the desired interface mode. Refer to section 0. If the GPIB option (option -IF) was ordered, it should be set this way from the factory but may have been changed after shipment).

2. Does the bus address selected in the System, Interface dialog match the address set using the DIP switches on the power supply. The GPIB address selected must match the settings on the DIP switch. If changes are made to the DIP switch setting, the power supply must be cycled off and on to have the new settings take effect.

3. Did you connect the cable in correctly and are both ends of the GPIB cable securely tied down?

Resolution for Symptom 1

When using a fast IEEE-488 bus controller, the power supply's IEEE-488 interface may not handshake fast enough to satisfy the controllers timing requirement. If this is the case, a time-out will result any time a command is sent to the power supply. To rectify this situation, the IEEE-488 controller must be set to use delayed bus timing. For National Instruments GPIB controller cards running under Windows™, this can be done from the device manager.

Select the GPIB interface and click on the NI-488.2M Settings tab. An Advanced button at the bottom of the screen will provide access to the Bus Timing parameter. Try settng this value to 500 nsec or

2sec to operate with the power supply's GPIB interface.

Figure 9-8: NI PCI-GPIB Advanced Settings Dialog

Figure 9-7: NI PCI-GPIB Settings

Test Sequence Program Directory Files

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9.8 Software Registration

Updates of this and other Argantix programs and drivers are posted on a regular basis on the Argantix web site. You can find available programs by selecting the Software, GUI's and Drivers menu. To gain access to these downloads, you will need to register as a user on our web site. For instructions on how to register and request the required access level for software downloads, visit our web site at

www.argantix.com

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10 Introduction to SCPI

SCPI (Standard Commands for Programmable Instruments) is a programming language for controlling instrument functions over the RS232 or IEEE 488 bus. The same SCPI commands and parameters control the same functions in different classes of instruments. For example, you would use the same MEAS:VOLT? command to measure the Power supply output voltage or the output voltage of a SCPI-compatible Multimeter.

10.1 Conventions Used in This Manual

Angle brackets<> Items within angle brackets are parameter abbreviations. For example,

<NR1> indicates a specific form of numerical data.

Vertical bar Vertical bars separate alternative parameters. For example, 0 | 1 indicates

that either "0" or "1" can be used as a parameter.

Square Brackets[] Items within square brackets are optional. The representation

[SOURce:]VOLT means that SOURce: may be omitted.

Boldface font Boldface font is used to emphasize syntax in command definitions. CURR

<NRf> shows a command definition.

Upper case font Upper case font is used to show program lines in text. OUTP 1 shows a

program line.

10.2 The SCPI Commands and Messages

This paragraph explains the syntax difference between SCPI Commands and SCPI messages. The power supply supports two types of commands, IEEE-488-2 common and SCPI subsystem

commands.  IEEE-488-2 common commands are generally not related to specific operations but to controlling

overall Power supply functions such as reset, status and synchronization. All common commands consist of a three-letter mnemonic preceded by an asterisk:

*RST *IDN? *SRE 255  SCPI Subsystem commands perform specific Power supply functions. They are organized into

an inverted tree structure with the "root" at the top. Some are single commands while others are grouped within specific subsystems. You must include the root header in all commands sent

to the Power supply.

Refer to appendix A for the SCPI tree structure.

Types of SCPI Messages

There are two types of SCPI messages, program and response.  A program message consists of one or more properly formatted SCPI commands sent from the

controller to the Power supply. The message, which may be sent at any time, requests the Power supply to perform some action.

 A response message consists of data in a specific SCPI format sent from the Power supply to the

controller. The Power supply sends the message only when commanded by a program message called a "query."

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The SCPI Command Tree

As previously explained, the basic SCPI communication method involves sending one or more properly formatted commands from the SCPI command tree to the instrument as program messages. The following figure shows a portion of a subsystem command tree, from which you access the commands located along the various paths (you can see the complete tree in appendix A).

Root [:SOURce] :VOLTage [:LEVel] :CURRent :RANGe :SYSTem :REMote :ERRor :LIMit :VOLTage :LOW? :HIGH?

Figure 10-1: Partial Command Tree

The Root Level

Note the location of the ROOT node at the top of the tree. Commands at the root level are at the top level of the command tree. The SCPI interface is at this location when:

 The Power supply is powered on  A device clear (DCL) is sent to the Power supply  The SCPI interface encounters a message terminator  The SCPI interface encounters a root specifier

Active Header Path

In order to properly traverse the command tree, you must understand the concept of the active header path. When the Power supply is turned on (or under any of the other conditions listed above), the active path is at the root. That means the SCPI interface is ready to accept any command at the root level, such as SOURCe or MEASurement.

If you enter SOURCe the active header path moves one colon to the right. The interface is now ready to accept :VOLTage or :CURRent as the next header. You must include the colon, because it is required between headers.

Note: The XDS Series interface buffer is limited to 21 characters, however. As such, compound commands are not recommended as they often exceed this message length limit.

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Moving Among Subsystems

In order to combine commands from different subsystems, you need to be able to restore the active path to the root. You do this with the root specifier (:). For example, you could set the output voltage to 60 V and set the display mode to power.

VOLT 60 DISP:MODE 3 Because the root specifier resets the command parser to the root, you can use the root specifier and

do the same thing in one message: VOLT 60;:DISP:MODE 3

Including Common Commands

You can combine common commands with system commands in the same message. Treat the common command as a message unit by separating it with a semicolon (the message unit separator). Common commands do not affect the active header path; you may insert them anywhere in the message.

VOLTage 115;*ESE 255 OUTPut 0;*RCL 2

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10.3 Using Queries

Observe the following precautions with queries:

 Set up the proper number of variables for the returned data.  Read back all the results of a query before sending another command to the power supply .

Otherwise a Query Error will occur and the non-returned data will be lost.

10.4 Structure of a SCPI Message

SCPI messages consist of one or more message units ending in a message terminator. The terminator is not part of the syntax, but implicit in the way your programming language indicates the end of a line (such as a newline or end-of-line character).

The Message Unit

The simplest SCPI command is a single message unit consisting of a command header (or keyword) followed by a message terminator.

CURRent?<newline> VOLTage?<newline> The message unit may include a parameter after the header. The parameter usually is numeric: VOLTage 20<newline> OUTPut 1<newline>

Combining Message Units

The following command message is briefly described here, with details in subsequent paragraphs.

Data Query Indicator Message Unit

Header SOUR:VOLT 80; CURR 60; :CURR? <NL>

Header Message Root Message Separator Unit Specifier Terminator Separator

Figure 10-2: Command Message Structure

The basic parts of the above message are:

Message Component Example

Headers SOURC VOLT CURR CURR Header Separator The colon in SOUR:VOLT Data 80 60 Data Separator The space in VOLT 80 and CURR 60 Message Units VOLT 80 CURR 60 CURR? Message Unit Separator The semicolons in VOLT 80; and CURR 60; Root Specifier The colon in :CURR?

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Query Indicator The question mark in CURR? Message Terminator The <NL> (newline) indicator. Terminators are not part of the SCPI

syntax

Note: The use of compound messages such as the one shown in Figure 12-2 is not

recommended as they typically exceed the available receive buffer length of the XDS Series interface.

Headers

Headers are instructions recognized by the power source. Headers (which are sometimes known as "keywords") may be either in the long form or the short form.

Long Form The header is completely spelled out, such as VOLTAGE, SYSTEM, and OUTPUT.

The XDS Parser will stop parsing the remainder of any command after its short form has been parsed. Effectively, this means the remainder will be a don't care and syntax errors will not be detected or reported.

Short Form The header has only the first three or four letters, such as VOLT, SYST, and OUTP.

The XDS parser only parses the short form of all SCPI commands and ignores any remainder.

The SCPI interface is not sensitive to case. It will recognize any case mixture, such as VOLTAGE, VOLTage or Voltage. Short form headers result in faster program execution.

Note: In view of the 21 character receive buffer size of the XDS Series, the short form

is recommended under all circumstances.

Header Convention

In the command descriptions used in this manual, the proper short form is shown in upper-case letters, such as DELay.

Header Separator If a command has more than one header, you must separate them with a colon, e.g.

(SYSTem:ERRor LIMit:VOLT:LOW).

Optional Headers

The use of some headers is optional. Optional headers are shown in brackets, such as VOLTage[:LEVel] 100.

Query Indicator

Following a header with a question mark turns it into a query (VOLTage?).

Message Unit Separator

When two or more message units are combined into a compound message, separate the units with a semicolon (VOLT 100;CURR 60).

Root Specifier

When it precedes the first header of a message unit, the colon becomes the root specifier. It tells the command parser that this is the root or the top node of the command tree. Note the difference between root specifiers and header separators in the following examples:

SOURce:VOLTage:LEVel 100 All colons are header separators :SOURce:VOLTage:LEVel 100 Only the first colon is a root specifier SOURce:VOLTage:LEVel 100;:CURRent 55 Only the third colon is a root specifier You do not have to precede root-level commands with a colon; there is an implied colon in front of every root-level command.

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Message Terminator

A terminator informs SCPI that it has reached the end of a message. The only permitted message terminator is:

 newline (<NL>), which is ASCII decimal 10 or hex 0A. In the examples of this manual, there is an assumed message terminator at the end of each

message. If the terminator needs to be shown, it is indicated as <NL> regardless of the actual terminator character.

10.5 SCPI Data Formats

All data programmed to or returned from the power source is in ASCII. The data type may be numerical or character string.

Numerical Data Formats Symbol Data Form

Talking Formats

<NR1> Digits with an implied decimal point assumed at the right of the least-significant digit.

Examples: 273 <NR2> Digits with an explicit decimal point. Example:.0273 <NR3> Digits with an explicit decimal point and an exponent. Example: 2.73E+2 <Bool> Boolean Data. Example: 0 | 1

Listening Formats

<Nrf> Extended format that includes <NR1>, <NR2> and <NR3>. Examples: 273.2 ,

2.73E2

<Bool> Boolean Data. Example: 0 | 1

Character Data

Character strings returned by query statements may take either of the following forms, depending on the length of the returned string:

<CRD> Character Response Data. Permits the return of character strings. <AARD> Arbitrary ASCII Response Data. Permits the return of undelimited 7-bit ASCII. This

data type has an implied message terminator. <SRD> String Response Data. Returns string parameters enclosed in double quotes.

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10.6 Programming Tips

When developing custom application code, the following guidelines should be followed if possible: All commands should be terminated with <NL> (hex 0A) character. In "C", the \n character sequence

will result in a <NL> character. This is the message terminator. The receive buffer of the XDS is limited to about 21 characters. Avoid sending long compound

message strings consisting of multiple commands. Commands longer than the receive buffer will result in "-100, Syntax Error"

Successive non-query commands (e.g. VOLT 100) sent to the unit should be spaced at least 20 msec apart. This is to allow the interface of the unit to receive and transmit the command over it's internal optically isolated serial bus to the main processor. This process takes place for both GPIB and RS232C control so this 'command hold-off' delay period is needed regardless of which interface is used. The same delay is not required following a query command (e.g. VOLT?) as the application program generally waits for the response before sending the next command.

Inserting this delay does not affect real through put as the unit would not respond any faster if commends were sent consecutively without delays in between.

Some commands take extra time to execute as they update the non-volatile memory of the unit. In particular, the *SAV command requires 300 msec to complete. No commands should be send during this time period.

It is good practice to check for error messages using the *ESR? or SYST:ERR? Queries. The XDS does not generate an SRQ on the GPIB bus so programmed polling is needed to check for status or errors.

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11 SCPI Command Reference

Where appropriate, related commands or queries are included. These are listed because they are either directly related by function, or because reading about them will clarify or enhance your understanding of the original command or query.

This chapter is organized as follows:

 Subsystem commands, arranged by subsystem  IEEE 488.2 common commands

11.1 Subsystem Commands

Subsystem commands are specific to Power supply functions. They can be a single command or a group of commands. The groups are comprised of commands that extend one or more levels below the root. The description of common commands follows the description of the subsystem commands.

The subsystem command groups are listed in alphabetical order and the commands within each subsystem are grouped alphabetically under the subsystem. Commands followed by a question mark (?) take only the query form. When commands take both the command and query form, this is noted in the syntax descriptions.

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11.2 Measurement Subsystem

This subsystem programs the measurement capability of the power supply.

Subsystem Syntax

MEASure :CURRent? [:LEVel] Returns the average DC value of current :AMPLitude :MAX? Returns peak current measurement reading :RESet Resets the peak current measurements :POWer Returns the DC power measurement reading. :VOLTage? Returns the DC voltage measurement reading

MEASure:CURRent[:LEVel]? This query returns the DC value of the DC current being sourced at the output terminals. Note that

the output must be on to obtain current flow. Query Syntax MEASure:CURRent?

Parameters None Examples MEAS:CURR? Returned Parameters <NR2> Related Commands OUTP 0  1 MEAS:CURR:AMPL:MAX?

MEASure:CURRent:AMPLitude:MAX? This query returns the peak current value of the output current being sourced at the output terminals.

Note that the output must be ON to obtain current flow. The peak current measurement circuit uses a sample and hold method and latches the highest peak current value found since the last peak measurement reset command.

Query Syntax MEASure:CURRent:AMPLitude:MAX? Parameters None Examples MEAS:CURR:AMPL:MAX? Returned Parameters <NR2> Related Commands OUTP 0  1 MEAS:CURR?

MEASure:CURRent:AMPLitdue:RESet This command resets the peak current measurement sample and hold circuit to zero.

Query Syntax MEASure:CURRent:AMPLitude:RESet Parameters None Examples MEAS:CURR:AMPL:RES Related Commands MEAS:CURR:AMPL:MAX?

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MEASure:POWer? This query returns the DC power delivered to the unit under test by the Power supply. Note that the

output must be on to obtain current flow. Query Syntax MEASure:POWer?

Parameters None Examples MEAS:POW? Returned Parameters <NR2> Related Commands MEAS:VOLT? MEAS:CURR?

MEASure:VOLTage? This query returns the average DC voltage being sourced at the output terminals. Note that the

output must be on or no voltage will be present at the output terminals. Query Syntax MEASure:VOLTage?

Parameters None Examples MEAS:VOLT? Returned Parameters <NR2> Related Commands OUTP 0  1

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11.3 Source Subsystem

This subsystem programs all the output parameters of the power supply.

Subsystem Syntax

[SOURce:] CURRent:

[LEVel] Set the current value in amps. HIGH Set the maximum current allowed LOW Set the minimum current allowed LIMit: CURRent? Current range limt: Model specific VOLTage? Voltage range limit. Model specific MODE? Returns power supply operating mode. VOLTage: [LEVel] Set the output voltage value in volts. HIGH Set the maximum voltage allowed LOW Set the minimum voltage allowed PROTection

[:LEVel] Set the over voltage protection trip level in % of

range.

STATe Enables or disabels OVP mode.

[SOURce:]CURRent[:LEVel] This command sets the current limit of the output. If the load current exceeds the programmed

current limit, the power supply will cross over from voltage mode to current mode. In this mode, the output voltage will fold back as much as needed to retain the current at the programmed limit.

The current may be set between the low limit and high limit as programmed using the CURR:HIGH and CURR:LOW commands. However, the high limit cannot be higher than the model's capability (configuration limit) which can be queried with the LIM:CURR? command. The low limit cannot be less than zero. The *RST state for high and low current is zero for low, and maximum configuration limit for high. (model specific).

Command Syntax [SOURce:]CURRent <NRf> Parameters value between CURR:HIGH and CURR:LOW settings. Unit A (amperes) *RST Defined by the PON Examples CURR 5 Query Syntax CURRent? Returned Parameters <NR2> Related Commands CURR:HIGH CURR:LOW

[SOURce:]CURRent:HIGH This command sets the maximum programmed current that will be accepted by the power supply. If a

value above this limit value is programmed, a "-200 Execution Error" will be generated. The current limit may be set between zero and the model's capability (configuration limit) which can

be queried with the LIM:CURR? command. The high limit cannot be less than the low limit however. The *RST state for high current limit is the maximum configuration limit. (model specific).

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Command Syntax [SOURce:]CURRent:HIGH <NRf> Parameters 0 to LIM:CURR? value. Unit A (amperes) *RST Max. Current Examples CURR:HIGH 5 Query Syntax CURRent:HIGH? Returned Parameters <NR2> Related Commands CURR CURR:LOW

[SOURce:]CURRent:LOW This command sets the minimum programmed current that will be accepted by the power supply. If a

value below this limit value is programmed, a "-200 Execution Error" will be generated. The current limit may be set between zero and the model's capability (configuration limit) which can

be queried with the LIM:CURR? command. The low limit cannot be more than the high limit however. The *RST state for low current limit is zero.

Command Syntax [SOURce:]CURRent:LOW <NRf> Parameters 0 to LIM:CURR? value. Unit A (amperes) *RST 0 Examples CURR:LOW 5 Query Syntax CURRent:LOW? Returned Parameters <NR2> Related Commands CURR CURR:HIGH

[SOURce:]LIMit:CURRent?

This command queries the maximum current the power supply can deliver. Only the Query format of this command is available to the user.

Command Syntax [SOURce:]LIMit:CURRent <NRf> Parameters maximum current [command protected] Query Syntax LIMit:CURRent? Returned Parameters <NR2>

[SOURce:]LIMit:VOLTage?

This command queries the maximum voltage the power supply can deliver. Only the Query format of this command is available to the user.

Command Syntax [SOURce:]LIMit:VOLTage<NRf> Parameters maximum voltage [command protected] Query Syntax LIMit:VOLTage? Returned Parameters <NR2>

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[SOURce:]MODE

This command is used to query the power supply's operating mode. The power supply can operate in either Constant Voltage or Constant Current mode. A numeric value is returned for a MODE? Query and is encoded as shown in the table below:

Value Mode

0 Undefined. 1 Constant Voltage (CV) 2 Constant Current (CC) 3 Cross over CV and CC mode

Table 11-1: Mode query result decoding

Command Syntax [SOURce:]MODE? Parameters None Query Syntax MODE? Returned Parameters <NR1> Related Commands none

[SOURce:]VOLTage[:LEVel] This command programs the DC output voltage level of the power supply. The voltage may be set between the low limit and high limit as programmed using the VOLT:HIGH

and VOLT:LOW commands. However, the high limit cannot be higher than the model's capability (configuration limit) which can be queried with the LIM:VOLT? command. The low limit cannot be less than zero. The *RST state for high and low voltage is zero for low, and maximum configuration limit voltage for high. (model specific).

Command Syntax [SOURce:]VOLTage[:LEVel] <NRf> Parameters value between VOLT:HIGH and VOLT:LOW settings. Unit V (rms voltage) *RST Value 0 volt Examples VOLT 250 VOLT:LEV 25 Query Syntax [SOURce:]VOLTage[:LEVel]? Returned Parameters <NR2> Related Commands VOLT:HIGH VOLT:LOW

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[SOURce:]VOLTage:HIGH This command sets the maximum programmed voltage that will be accepted by the power supply. If a

value above this limit value is programmed, a "-200 Execution Error" will be generated. The voltage limit may be set between zero and the model's capability (configuration limit) which can

be queried with the LIM:VOLT? command. The high limit cannot be less than the low limit however. The *RST state for high voltage limit is the maximum configuration limit. (model specific).

Command Syntax [SOURce:]VOLTage:HIGH <NRf> Parameters 0 to LIM:VOLT? value. Unit V (Volt) *RST Max. Voltage Examples VOLT:HIGH 5 Query Syntax VOLTage:HIGH? Returned Parameters <NR2> Related Commands VOLT VOLT:LOW

[SOURce:]VOLTage:LOW This command sets the minimum programmed current that will be accepted by the power supply. If a

value below this limit value is programmed, a "-200 Execution Error" will be generated. The voltage limit may be set between zero and the model's capability (configuration limit) which can

be queried with the LIM:VOLT? command. The low limit cannot be more than the high limit however. The *RST state for low current limit is zero.

Note: This feature is best reserved for program control applications. If a low voltage limit is set over the bus and the unit is subsequently used stand-alone from the front panel, it is possible that the voltage is set to 0 volt as a result of a fault condition. If this happens, the front panel voltage knob will be locked out from that point forward and the operator will be enable to remedy this lock-out as the volt low limit cannot be set from the front panel. To avoid these potential lock-outs, leave the volt low limit at 0 Volts.

Command Syntax [SOURce:]VOLTage:LOW <NRf> Parameters 0 to LIM:VOLT? value. Unit V (Voltage) *RST 0 Examples VOLT:LOW 5 Query Syntax VOLTage:LOW? Returned Parameters <NR2> Related Commands VOLT VOLT:HIGH

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[SOURce:]VOLTage:PROTection[:LEVel] This command programs the OVP trip level of the power supply. The OVP trip level is set as a percentage of voltage range. Allowable range is 0 to 110%. If the

output voltage exceeds the set trip level and the OVP mode is enabled, the power supply will generate a -300, Device specific error and turn off the output. The mode is enabled with the VOLT:PROT:STAT command. The OVP mode provides another level of protection in addition to the volt:high user setting which prevents programming commands or front panel inputs above this level to be accepted. The OVP function is based on the measured output voltage rather than the programmed output value.

Command Syntax [SOURce:]VOLTage:PROTection[:LEVel] <NR1> Parameters percentage of V range Unit % *RST Value 110 Examples VOLT:PROT 80 VOLT:PROT:LEV 25 Query Syntax [SOURce:]VOLTage:PROTection[:LEVel]? Returned Parameters <NR1> Related Commands VOLT:PROT:STATE

[SOURce:]VOLTage:PROTection:STATe This command enables or disables the OVP mode of the power supply. The OVP mode state may be set using this command. If the output voltage exceeds the set trip level

and the OVP mode is enabled, the power supply will generate a -300, Device specific error and turn off the output. If the OVP mode is disabled, nothing will happen. Valid parameters are 0 for OVP off and 1 for OVP on.

Command Syntax [SOURce:]VOLTage:PROTection:STATe <NR1> Parameters 0 | 1 *RST Value 0 Examples VOLT:PROT STAT 0 VOLT:PROT:STAT 1 Query Syntax [SOURce:]VOLT:PROT:STAT? Returned Parameters <NR1> Related Commands VOLT:PROT[:LEV]

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11.4 Output Subsystem

This subsystem controls the output of the power supply.

Subsystem Syntax

OUTPut [:RELay] Turns the output on or off. DROP [:TIME] Sets the output voltage for a specified amount of time or indefinitely to the

voltage level set.

:LEVel Sets the absolute voltage level to 'drop' to. OUTPut[:RELay]

The output of the Power supply can be turned on (1) or off (0) using this command. The status of the output relay can be queried as well. Note that if the output is shut-down by the remote shut-down input signal on connector J22, the output query only returns the programmed state, not the actual state of the output. Thus, the remote shut-down (remote inhibit) overrides the programmed state of the output.

Command Syntax OUTPut[:RELay] <bool> Parameters <Bool> 0 | 1 *RST Value defined by the PONS Examples OUTP 1 Query Syntax OUTPut? Returned Parameters 0 | 1 Related Commands OUTP:DROP OUTP:LEV

OUTPut:DROP[:TIME] The output drop command may be used to change the voltage to the UUT for a specific period of

time. This command may be used to change the output voltage for a period of time as little as 1 msec or as long as 4000 sec. The voltage setting during this time is determined by the OUTP:DROP:LEV command.

The parameter passed with the OUTP:DROP command is the event duration in seconds. This value can range from 0.001 (1 msec) to 4000 (1 hour, 6 min, 40 sec) but only four digits of resolution are allowed. If no parameter is passed, the output is set to the programmed drop level indefinitely or until a voltage command is issued. Thus valid time periods are:

Time range Range

0.001 - 9.999 1 msec to 10 secs

10.00 - 99.99 10 secs to 100 secs

100.0 - 999.9 100 secs to 1000 secs 1000 - 4000 1000 secs to 4000 secs no parameter Infinite time. Use VOLT command to turn output on.

Output drop status query

The status of a drop in progress can be queried using the query format of the OUTP:DROP command. This query will return a <Bool> indicating if the output time specified has expired (0) or the drop is still in progress (1).

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Command Syntax OUTPut:DROP <NRf> Parameters <NRf> | none *RST Value none Examples OUTP:DROP 0.001 Query Syntax OUTP:DROP? Returned Parameters 0 | 1 Related Commands OUTP:DROP:LEV

OUTPut:DROP:LEVel The output drop level command sets the voltage level used by the OUTP:DROP:TIME command.

The level set must be between the VOLT:HIGH and VOLT:LOW limits or a "-200, Execution Error" will be generated.

Command Syntax OUTPut:DROP:LEVel <NRf> Parameters <NRf> *RST Value 0 Examples OUTP:DROP:LEV 20.5 Query Syntax OUTP:DROP:LEV? Returned Parameters <NR2> Related Commands OUTP:DROP

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11.5 Display Subsystem

DISPlay:MODE

This command is used to control the right hand side Power supply LED display. The command will allow the multifunction LED display to switch between display of:

1. current setting or current measurement,

2. peak current measurement

3. power measurement. The encoding for the mode command is as shown in the table below,

Parameter Value

Current 1 Peak Current 2 Power 3

Table 11-2: Display Mode Command Encoding

Command Syntax DISPlay:MODE <NR2> Parameters 1 | 2 | 3 *RST Value 1 Examples DISP:MODE 2 Query Syntax DISPlay:MODE? Returned Parameters <NR1> Related Commands none

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11.6 System Commands

The system commands control the system level functions of the Power supply.

Subsystem Syntax

SYSTem: CONFigure Sets the Remote Inhibit (RI) polarity mode ERRor? Returns the error number and error string KLOCk Keyboard Lock. Sets the power on REMOTE/LOCAL state. LOCal Go to local mode PON Define the power on register number REMote Go to remote mode

SYSTem:CONFigure

This commands set the polarity mode for the Remote Inhibit shutdown input. Once set using the SYST:CONF command, the mode can be retained at power up by sending the SYST:SAVE command. Factory setting is 0 or active low. In this mode, the output will be disabled when the RI is pulled to ground or shorted. When set to 1, the output will be enabled when the RI is pulled to ground or shorted. Note: This function is only supported on DC supplies with firmware revision 0.4 or higher. See *IDN? for firmware revision.

Query Syntax SYSTem:CONFigure Parameters 0 | 1 Returned Parameters <NR1>,<SRD> Example SYST:CONF 0, followed by SYST:SAVE

SYSTem:ERRor?

This query returns the next error number followed by its corresponding error message string from the remote programming error queue. The queue is a FIFO (first-in, first-out) buffer that stores errors as they occur. As it is read, each error is removed from the queue. When all errors have been read, the query returns 0,”No Error”. If more errors are accumulated than the queue can hold, the last error in the queue is -350,”Queue overflow”.

Query Syntax SYSTem:ERRor? Parameters None Returned Parameters <NR1>,<SRD> Example SYST:ERR?

SYSTem:KLOCk

This command sets or clears the power on LOCAL or REMOTE state. When set (1), the Power supply will power up in remote state, locking out all keyboard controls. The local state can only be entered by sending a bus command. This mode may be used to prevent operator access to front panel controls under all conditions. Note that changing the state of the KLOC setting does not change the REMOTE or LOCAL state. This setting only affects the REMOTE/LOCAL state at powerup.

Command Syntax SYSTem:KLOCk Parameters 0 | 1 Example SYST:KLOC 1 Query Syntax SYST:KLOC? Returned Parameters <NR1> Related Commands SYST:REM SYST:LOC

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SYSTem:LOCal

This command sets the interface in Local state, which enables the front panel controls. This command only applies to the RS232C interface. If IEEE 488 is used, the remote/local state is determined by the REN line on the IEEE 488 interface but the SYST:LOC and SYST:REM command will also be accepted and will toggle the remote state despite the status of the IEEE REN line.

Command Syntax SYSTem:LOCal Parameters None Example SYST:LOC Related Commands SYST:REM

SYSTem:REMote

This command sets the interface in the Remote state, which disables all front panel controls. This command only applies to the RS232C interface. If IEEE 488 is used, the remote/local status is determined by the REN line on the IEEE 488 interface but the SYST:LOC and SYST:REM command will also be accepted and will toggle the remote state despite the status of the IEEE REN line.

Command Syntax SYSTem:REMote Parameters None Example SYST:REM Related Commands SYST:LOC

SYSTem:PON

This command is used to define the register value the power supply will use to initialize its parameters at power up. If data in the selected register is not valid or the selected register is 8, the initialization will be with factory default values. Refer to Table 4-1: Factory Default Power on Settings on page 33.

Command Syntax SYSTem:PON <NRf> Parameters 0 to 8 Examples SYST:PON 1 Query Syntax SYST:PON? Returned Parameters <NR1> Related Commands *RST

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11.7 Common Commands

Common commands begin with an * and consist of three letters (command) or three letters and a ? (query). Common commands are defined by the IEEE 488.2 standard to perform some common interface functions. The power supply responds to the required common commands that control status reporting, synchronization, and internal operations. XDS Series units also respond to optional common commands that control stored operating parameters.

Common commands and queries are listed alphabetically. If a command has a corresponding query that simply returns the data or status specified by the command, then both command and query are included under the explanation for the command. If a query does not have a corresponding command or is functionally different from the command, then the query is listed separately. The description for each common command or query specifies any status registers affected. Refer to Chapter 13 which explains how to read specific register bits and use the information that they return.

Common Commands Syntax *CLS Clear status

*ESE <n> Standard event status enable *ESE? Return standard event status enable *ESR? Return event status register *IDN? Return instrument identification *RCL <n> Recall instrument state *RST Reset *SAV <n> Save instrument state *SRE <n> Set service request enable register *SRE? Return service request enable register *STB? Return status byte

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Specifications and Main Features

Frequently Asked Questions

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