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Xantrex Technology XTR 850 WATT SERIES Configuring Multiple Supplies for Current Sharing Operation (APG Method)

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Using Multiple Power Supplies

M370046-01 3-45

3

Configuring Multiple Supplies for Current Sharing Operation (APG Method)

Up to four power supplies can be connected in parallel to increase the

output current. One of the units will operate as the master unit and the

remaining units will operate as slave units controlled by the master unit.

The master unit uses the analog programming lines to set the output

voltages and currents of the slave units to match its output.

In remote digital operation, only the master unit can be programmed

remotely while the slave units that are connected remotely will only

provide voltage, current and status readback information.

In APG current sharing topologies, only the master unit can be

programmed using any of the input methods (front panel, remote digital,

or analog programming control). The slave unit(s) voltage and current

output(s) are determined by the master unit through the REF_I input to

each slave unit. The readback using any of the monitoring methods (front

panel display, user monitor lines or SCPI measure commands) of each

unit (master or slave) will provide individual unit status, not system

status.

Setting up the Master Unit

Set the output voltage of the master unit to the desired voltage. Program

the current set point of the master unit to the desired load current set point

divided by the number of parallel units. During operation, the master unit

operates in Constant Voltage mode, regulating the load voltage at the

programmed output voltage. Send the Current share command.

The SCPI command (s) for these instructions are:

[[:]SOURce[<channel>]]:COMBine:CSHare[:MODE]

Setting up the Slave Units

The output voltage and current of the slave units should be programmed

to maximum value. During parallel operation, the slave units operate as a

controlled current source following the master unit’s output current.

All slave units must be configured with the SCPI command to enable

current sharing.

The SCPI command (s) for these instructions are:

[[:]SOURce[<channel>]]:COMBine:CSHare[:MODE]

Contents

Main Page Page About Xantrex Trademarks Notice of Copyright Exclusion for Documentation Date and Revision Page Page About This Manual (firmware v1.09 and below) Purpose Scope Audience Related Information Acronyms Font Conventions Important Safety Instructions Power Supply Safety Markings WARNING: High energy and high voltage WARNING: Fire hazard WARNING: Limitations on use Standard Warnings WARNING: Keep these instructions Contents Important Safety Instructions 1 2 Introduction 3 Local Operation 4 Analog Programming (APG) and Isolated Analog Programming (ISOL) 5 Remote Operation A SCPI Command Reference B Calibration and Troubleshooting B Error Messages Page Page Figures Page Tab le s Page Page Features and Options XTR 850 Watt Models Page Front Panel Display and Controls Figure 1-2 Front Panel Display and Controls Introduction 1-6 M370046-01 Rear Panel Connectors Figure 1-3 Figure 1-4 Rear Panel: 6 V to 40 V Models Rear Panel: 60 V to 150 V Models Page Page Page Basic Setup Procedure Basic Setup Procedure Step 1: Inspecting and Cleaning Initial Inspection Periodic Cleaning Step 2: Location and Mounting Rack Mounting Purchasing Rack Mount Kits Venti lati on Step 3: Connecting AC Input Power Step 4: Selecting Load Wires Load Wiring Insulation Rating Current Carrying Capacity Page Step 5: Performing Functional Tests Poweri ng the Pow er Suppl y On/Off Voltage and Current Mode Operation Checks Step 6: Connecting Loads DC Output Connectors 6 V40 V Models 60 V150 V Models 300 V600 V Models Inductive Loads and Batteries CAUTION Connecting Single Loads Connecting Multiple Loads Step 7: Connecting Remote Sensing CAUTION: Reverse polarity Page Configuring Settings from the Front Panel Using the 9-Position Mode Control Using the Rotary Adjust/Enter Control Coarse and Fine Adjustment Modes Table 3-1 Select and Set from the Front Panel Navigating the Menu System Setting VOLTS and AMPS Modes Page Normal Display Mode and Inactivity Timeout Page Display Messages on the Front Panel Front Panel Display Text Table 3-2 Front Panel Display Text Standard Operation Operating Modes Constant Voltage Mode Operation Constant Current Mode Operation Automatic Mode Crossover Page Page Shipped Configuration (Local Operation) Enabling the Output Enabling the Auxiliary Output Output Auto Start Mode (Auto Restart) Auxiliary Auto Start Mode Alarms and Errors Clearing Alarms Clearing Triggered and Manual Alarms Clearing a Flash Failure Alarm Clearing Automatic Alarms Front Panel ALARM LED Alarm Masking Alarm Output Latching Setting Foldback Mode Resetting Activated Foldback Protection Using Over Voltage Protection (OVP) Defining the OVP Set Point Using Under Voltage Protection (UVP) Defining the UVP Set Point Over Current Protection (OCP) Using Over Temperature Protection Lock (OTP) Defining the OTP Mode Resetting in Latch Mode Using the External Shutdown Function Activating the External Shutdown Function Controlling the External Shutdown Function Defining the Polarity of the External Shutdown Signal Interlock Function Defining the Interlock Mode Power On Status Signal Hardware Malfunction Alarms Current Configuration Memory Settings User Setting Memory Locations Saving User Setting Memory Locations Recalling User Setting Memory Locations Local Lockout Enabling Local Lockout Disabling Local Lockout Page Resetting the Power Supply Page Using Multiple Power Supplies Page Using Multiple Power Supplies M370046-01 3-43 Configuring Multiple Supplies for Series Operation Power Supply Connecting to the Load in Local Sensing Mode Figure 3-6 Series Operation Connecting to the Load in Remote Sensing Mode Configuring Multiple Supplies for Current Sharing Operation (APG Method) Setting up the Master Unit Setting up the Slave Units Setting Over Voltage Protection (OVP) Setting Foldback Protection Page Page Page Analog Programming (APG) of Output Voltage and Output Current Remote Programming Options Analog Monitor Signals Auxiliary Outputs Analog Programming (APG) Connector J1 Figure 4-1 APG Connector Terminals Table 4-3 APG Pins and Functions J1 Table 4-3 APG Pins and Functions J1 Making Control Connections Wiring Analog Programming Mode Analog Programming With External Voltage Source J1.9 J1.7 J1.10 J1.7 Voltage-Controlled Voltage APG Setup Activating APG Voltage Mode Deactivating APG Voltage Mode Query for Analog Voltage Input Level Voltage-Controlled Current APG Setup Activating APG Current Mode Deactivating APG Current Mode Query for Analog Current Input Level Page Resistive-Controlled Voltage APG Setup Deactivating APG Voltage Mode Query for Analog Voltage Input Level Resistive-Controlled Current APG Setup Deactivating APG Current Mode Query for Analog Current Input Level Page Isolated Analog Programming Mode (ISOL) AUX Output and Isolated Analog Programming (ISOL) Connector Table 4-4 AUX Output and ISOL Connector Pins and Functions J3 Page Making ISOL Control Connections ISOL Programming With External Voltage Source Voltage-Controlled Voltage ISOL Setup Activating ISOL Programming Voltage Mode Deactivating ISOL Voltage Mode Query for ISOL Voltage Input Level Voltage-Controlled Current ISOL Setup Activating ISOL Programming Current Mode Deactivating ISOL Current Mode Query for ISOL Current Input Level Analog Programming With External Resistor Resistive-Controlled Voltage ISOL Setup Activating ISOL Programming Voltage Mode Deactivating ISOL Voltage Mode Query for ISOL Voltage Input Level Resistive-Controlled Current ISOL Setup Activating ISOL Resistive-Controlled Current Setup Deactivating ISOL Current Mode Query for ISOL Current Input Level Voltage and Current Readback (Isolated) Query Remote Control Source State V V Page Page Page Hardware and Connection Setup Configuring Remote Control Using RS-232 RS-232 Communication Cable with RJ-45 to DB-9 RS-232 Communication Cable with RJ-45 to DB-25 Completing the Setup Configuring Remote Control Using RS-485 RS-485 Communication Cable with RJ-45 to DB-9 RS-485 Communication Cable with Two RJ-45s Completing the Setup Configuring Remote Control using the USB Connector Setting Up the PC to Use the USB Connection Installing USB to Serial Converter and Serial Port Page Verifying Installation Page Page Page Ethernet (ENET) or GPIB Connector (Optional) Multiple Power Supply Connections to RS-485 Bus Multiple Power Supply Setup Terminal Configuration Data Format End of Message HyperTerminal Setting up a HyperTerminal connection Page Page Selecting the Appropriate Communication Port Data Rate Setting (Kbps) Multichannel Address Setting Remote Interface Addressing Multichannel Commands Explained Page Status Reporting in SCPI 5-26 M370046-01 OPERation Status Figure 5-16 SCPI Status Reporting Model Standard Event Status Register + Status Byte Status Registers Model from IEEE 488.2 Figure 5-17 IEEE 488.2 Register Model Status Byte Error/Event Queue (ERR) Questionable Status Register Summary (QSR) Page Operation Status Register Summary (OSR) Service Request Enable Register Query the Status Byte Standard Event Status Register (SESR) Standard Event Status Enable Register Standard Event Status Register Figure 5-18 summarizes the Standard Event Status Register. Figure 5-18 Summary of Standard Event Status Register Table 5-1 0 Standard Event Status Register Operation Complete Wait-to-Continue Command Standard SCPI Register Structure OPERation Status Register M370046-01 5-35 OPERation Status Register Figure 5-20 Operation Status Register Fanout Page Page Current SHare Sub-Register Operation Status Register Commands Current Sharing Sub-Register Commands Shutdown Sub-Register Commands Protection Sub-Register Commands QUEStionable Status Register 5-44 M370046-01 Figure 5-21 SCPI QUEStionable Registers Fanout Table 5-15 QUEStionable Status Register VOLTage Sub-Register TEMPerature Sub-Register Questionable Status Register Commands Voltage Status Register Commands Temperature Status Register Commands Query Temperature Status Register Event Query Temperature Status Register Condition Enable Temperature Status Register Set Temperature Status Positive Transition Filter SCPI Error/Event Queue Querying For the Errors Querying For the Error Code Only Querying For the Number of Errors in the Queue Reset Command Clear All Status Registers Clear Status Command SCPI Preset Status Command Line Help System Querying Help for all Command Headers 5-56 M370046-01 Querying Help for Legacy Command Headers Querying Help for Command Syntax Page Locking and Unlocking the Front Panel Auto Sequence Programming Setting Dwell Time Storing an Auto Sequence Program: Saving an Auto Sequence Program to File: Readback and Troubleshooting an Auto Sequence Program: Reloading an Auto Sequence Program: Running an Auto Sequence Program: Deleting an Auto Sequence Program: Repeating an Auto Sequence Program: The output after the last command might be as follows: Configure Other Protection Mechanisms Foldback Protection Setting the Foldback Mode Over Temperature Protection Interlock Enable/Disable Save and Recall Set Analog Programming Level Set Remote Programming Interface Protection Mask (Enable Alarms) Page Page SCPI Conformance Information Codes and Standards IEEE 488.2 Requirements SCPI Requirements IEEE 488.2/SCPI Syntax and Style SCPI Command Hierarchy Using SCPI Commands Using Minimum and Maximum Using Queries Terminating Characters Common Commands Parameter Types Boolean Parameters Discrete Parameters Numeric Parameters String Parameters SPCI Command Tree M370046-01 A-9 SCPI Command Reference A-10 M370046-01 M370046-01 A-11 SCPI Command Reference A-12 M370046-01 M370046-01 A-13 SCPI Command Summary indicates Not applicable. (The command has no query form and will respond with an error Query? Indicates whether the unit supports a query version of the listed command. N/A Description Explains what the command does or what is affected by it. SCPI Command The full command in long form. Table A-1 IEEE 488.2 Commands (Continued) Table A-2 IEEE 488.2 Commands (Continued) Readback Commands Table A-1 Table A-3 SCPI Commands for Output Control Table A-4 SCPI Commands for Calibration Page Page Table A-5 SCPI Commands to Clear All Protection Mechanisms Table A-6 SCPI Commands for Foldback Protection Table A-4 Table A-7 SCPI Commands for Power Table A-8 SCPI Commands for Triggering Table A-9 System Commands Page Page Table A-1 0 Status Commands Table A-9 Page Page Page Page Page Page Page Table A-1 1 Protection Commands Table A-1 2 Auto Sequence Commands Table A-12 Auto Sequence Commands (Continued) Page Page Page Main Voltage and Current Calibration Principle Understanding the Problem Page Page Calibrating the Output Voltage Gain Calibration Offset Calibration Calibrating the Output Current Gain Calibration Offset Calibration Over Voltage Protection Calibration Non-isolated Analog Programming Calibration Non-isolated Voltage Monitoring Calibration Non-isolated Current Monitoring Calibration Non-isolated Voltage Programming of Voltage Calibration Non-isolated Resistive Programming of Voltage Calibration Non-isolated Voltage Programming of Current Calibration Non-isolated Resistive Programming of Current Calibration Calibration Procedure for Isolated Modes Isolated Voltage Monitoring Calibration Isolated Current Monitoring Calibration Isolated Voltage Programming of Voltage Calibration Isolated Resistive Programming of Voltage Calibration Isolated Voltage Programming of Current Calibration Important:: Isolated Resistive Programming of Current Calibration Calibrating the Input Voltage APG Signal Gain Calibration Offset Calibration Calibrating the Input Current APG Signal Gain Calibration Offset Calibration Storing and Loading Calibration Parameters Restore Factory Calibration User Diagnostics Emergency Shutdown Unusual or Erratic Operation Troubleshooting for Operators Page Error Messages B Command Error List Command Error List Execution Error List B Device-Specific Error List Query Error List C C-2 M370046-01 Electrical Specifications for XTR 850 Watt Table C-1 XTR 850 Watt Electrical Specifications for 6 V to 600 V Models M370046-01 C-3 Electrical Specifications for XTR 850 Watt AC Line Input Specifications for XTR 850 Watt The input to the power supply requires the following input specifications. Tabl e C-1 XTR 850 Watt Electrical Specifications for 6 V to 600 V Models C-4 M370046-01 Remote Operation Table C-2 M370046-01 C-5 Common Specifications for All Models Common Specifications for All Models C-6 M370046-01 Common Specifications for All Models M370046-01 C-7 Figure C-1 XTR 850 Watt Mechanical Dimensions: 6 to 40 V Models C-8 M370046-01 Figure C-2 XTR 850 Watt Mechanical Dimensions: 60 V to 600 V Models Warranty and Product Information Warra nty What does this warranty cover? This Limited Warranty is provided by Xantrex Technology Inc. What will Xantrex do? Xantrex will, at its option, repair or replace the defective product free of How do you get service? If your product requires troubleshooting or warranty service, contact your Disclaimer Product Exclusions Return Material Authorization Policy Return Procedure If you are returning a product from outside of the USA or Canada In addition to the above, If you are returning a product to a Xantrex Authorized Service Center (ASC) A Xantrex Out of Warranty Service Information About Your System Index Numerics A C D G I L M N W X