Xantrex Technology XDC Section 5. Current Sharing (6000 Watt only)

Release 3.0 173

Section 5. Current Sharing (6000 Watt only)

Overview

The current sharing function is only available for 6000Watt units. Power supplies

can be equipped with the optional CANbus interface to allow current sharing

between units connected in parallel. Current sharing can use a maximum of 5

supplies. All power supplies must be the same model. Every unit must have a unique

address. See “Multichannel Operation (6000 Watt only)” on page 113.

Figure 5.1Connections for Current Share Operation

Theory of

Operation

Power supplies may be connected in parallel to supply a large current to a load.

Typically, because of differences in the load connections, each power supply may

provide different amounts of current to the load.

When multiple power supplies are configured for current sharing, the master supply

will make minute changes to the slave’s voltage and current to equalize the current

draw from each.

The slaves will track the master's voltage, current, output and output on/off setting.

Contents

Main Operating Manual XDC 6000 Watt and 12000 Watt Series Digital Programmable DC Power Supply Page Page Limited Warranty Page Disclaimer Exclusions Page Warnings and Cautions Warnings and cautions are defined and formatted in this manual as shown below. Power Supply Safety Page Page About This Manual Revisions Contents Section 1. About The XDC Power Supply Section 2. Installation Section 3. Operation Contents Section 4. Remote Operation Section 5. Current Sharing (6000 Watt only) Appendix A. Calibration Contents Appendix B. SCPI Command Reference Appendix C. Error Messages Appendix D. GPIB Appendix E. Specifications and Characteristics Index List of Tables Page List of Figures Page Section 1. About The XDC Power Supply Page Page Page Page Table 1.1 Front Panel Functions Key Functions Special Key Functions Menu Function Display Status Annunciators Page Rear Panel Page Page Section 2. Installation Basic Setup Procedure Inspection, Cleaning, and Packaging Returning Power Supplies to the Manufacturer Page Location, Mounting, and Ventilation Page Page AC Input Power Page Page Page Figure 2.6 Attaching the AC Input Wires for 12000 Watt units Basic Checks or Self-Tests DC shunt 1mV/A ( Page Page Load Wiring Page Load Connections Page Page Page Page Remote Sensing Section 3. Operation Power Supply Operating States Power Supply Regulation Modes Remote Control Modes Front Panel Controls Page Page Power Supply Operation Set Current The CURRENT key allows you to set and view the DC current output setpoint. Page Page These 2 extra steps are shown in the following example. To set the Under-Voltage Protection: To set the Over-Current Protection: To set the Under-Current Protection: To set the Over-Power Protection: Page Page Page Page Page Page The following table demonstrates how to set and save current and voltage settings: Change Stored Settings Page To select a stored user setting: To select a factory setting: For operation of Auto Sequence mode, see Using Auto Sequencing on page 97. To select Auto Sequence: Table 3.1 Settings Affected by Recall Page Page Page Factory Preset User Setting Last Setting Page Programming a Sequence This option allows you to set up command programs for automated operation. To program a sequence: Page Page Deleting a This option allows you to delete an entire sequence. To delete a sequence: Editing a Inserting a Deleting a Editing Repeat Times of a Editing Trigger Source of a Page Page Page To set the current limits: Page Page Default Display Section 4. Remote Operation Page Making Connections for Remote Control Remote Analog Operation Figure 4.2 Schematic For User Line Interface Table 4.2 Analog Programming Pins Page Page Multichannel Operation (6000 Watt only) Page Page Page RS-232 Operation RS-232 Connection First set the RS-232 parameters: Configuration Table 4.6 RS-232 Pins GPIB Operation GPIB Connection Table 4.7 GPIB Pins Configuration Next, select GPIB as the remote control interface. Front panel First set the GPIB parameters: Page SCPI Commands for Digital Interfaces Page Page Table 4.8 Features Affected by Reset (*RST) Command Page Page Page Page Page Page Page Page Page Page Page Page Page Page Figure 4.4 Operation Status Registers 144 Table 4.9 OPERation Status Register Page Page Table 4.13Remote CONtrol Sub-Register Current SHare Sub-Register Table 4.14Current SHare Sub-Register Page Figure 4.5 Questionable Status Registers 150 Table 4.15QUEStionable Status Register VOLTage Sub-Register This shows whether the present voltage level is over or under the specified trip limit. Table 4.18POWer Sub-Register Table 4.16VOLTage Sub-Register CURRent Sub-Register This shows whether the present current level is over or under the specified trip limit. TEMPerature Sub-Register Status Byte + Figure 4.6 IEEE 488.2 Status Register and Status Byte Table 4.19TEMPerature Sub-Reg ister page 219 Device-Specific Error List on page 218 page 216 Status Byte Table 4.21Status Byte Summary Register This bit it TRUE if any errors are present in the Error/Event Queue. Error/Event Queue (ERR) Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Section 5. Current Sharing (6000 Watt only) Page Operation Specifications Page Appendix A. Calibration Entering Calibration Mode Page Page Page Front Panel Calibration Procedure Page Page Page Remote Interface Calibration Procedure Page Page Page Page Exit calibration mode Restore Factory Calibration Appendix B. SCPI Command Reference Page Using SCPI Commands Page Parameter Types Page Release 3.0 199 Table B.1IEEE 488.2 Commands 200 Table B.2 Readback Commands Release 3.0 201 Table B.3Commands for Output Control 202 Table B.4 Commands for Current Share (6000W only) Release 3.0 203 Table B.5Commands for Calibration Table B.6Command to Clear all Protection Mechanisms 204 Table B.7 Commands for Fold Protection Table B.8 Commands for Triggering Table B.9 System Commands Release 3.0 205 Table B.10 Status Commands 206 Release 3.0 207 208 Release 3.0 209 Table B.11 Protection Commands Table B.12 User Lines Table B.13 Output State 210 Table B.14Auto Sequence Commands Release 3.0 211 212 Table B.15Legacy Commands Expressions Table B.16 Expressions Page Appendix C. Error Messages Command Error List Execution Error List Page Device-Specific Error List Table C.3 Device-Specific Error List Query Error List User Request Event Operation Complete Event Front Panel Error Codes Table C.7 Front Panel Error Codes Table C.1 0Auto Sequencing Error Codes CPU Error Codes Table C.8 CPU Error Codes CANbus Error Codes Table C.11 CANbus Error Codes Table C.1 2Multichannel Error Codes Multichannel Error Codes Multichannel functionality is only available with the 6000 Watt power supply. Current Share Error Codes Current share functionality is only available with the 6000 Watt power supply. Table C.1 3Current Share Error Codes Appendix D. GPIB Codes and Standards Message Terminators Address Range Service Request and Polling Protocol Specifications Electrical Specifications Low State: Output voltage < High State: Output Voltage (3 state) Mechanical Specifications Performance Specifications Page Appendix E. Specifications and Characteristics Electrical SpecificationsSummary Table E.1 Specifications for 6000Watt units (10V to 60V Models) Table E.2 Drift Specifications for 6000Watt units (10V to 60V Models) Table E.3 Specifications for 6000Watt units (80V to 600V Models) Table E.4 Drift Specifications for 6000Watt units (80V to 600V Models) Table E.5 Specifications for 12000 Watt units (10V to 60V Models) Table E.6 Drift Specifications for 12000Watt units (10V to 60V Models) Table E.7 Specifications for 12000 Watt units (80V to 600V Models) Table E.8 Drift Specifications for 12000Watt units (80V to 600V Models) AC Line Input Specifications Output Performance Specifications Typical Programming Resolution Typical Measurement Resolution Readback Accuracy Programming Accuracy 30 Minute Drift 8 Hour Drift Temperature Stability Analog Programming Interface Temperature Coefficients Page Page Environmental Specification International Approvals Mechanical Specification Figure E.2 Power Supply Dimensions (12000 Watt unit) Index Page Page Page Page Page Page Xantrex Technology Inc.