EPS RS 232 Manual 

Telefon +49 (0)821 570451-0 Electronic Power Supplies Fax +49 (0)821 570451-25 Alter Postweg 101 [email protected] D-86159 Augsburg www.eps-germany.de M a n u a l EPS/MP

Technical Specifications .............................................................................................................................................. 4 Ambient Conditions ............................................................................................................................................................ 4 Input Specifications ............................................................................................................................................................ 4 Output Specifications ......................................................................................................................................................... 4 AI Interface ......................................................................................................................................................................... 5 RS 232 ................................................................................................................................................................................. 5 RS 485 ................................................................................................................................................................................. 5 Technical Drawing ............................................................................................................................................................... 6 Important Safety Instructions ..................................................................................................................................... 7 Initial Operation .................................................................................................................................................................. 7 Unpacking ........................................................................................................................................................................... 7 Setting Up ........................................................................................................................................................................... 7 Visual Inspection ................................................................................................................................................................. 7 Mains Operation ................................................................................................................................................................. 7 Functional Description ................................................................................................................................................ 8 General Settings ......................................................................................................................................................... 9 Front Panel Description ...................................................................................................................................................... 9 Configuration ...................................................................................................................................................................... 9 Contrast ............................................................................................................................................................................ 10 Voltage Settings........................................................................................................................................................ 10 Ulimit and Ilimit ..................................................................................................................................................................... 10 OVP (Over Voltage Protection) ......................................................................................................................................... 10 AI-Type .............................................................................................................................................................................. 10 Remember Last Setting ..................................................................................................................................................... 10 Interface parameter (Option) ........................................................................................................................................... 10 Front Panel Operation .............................................................................................................................................. 11 Display and Settings .......................................................................................................................................................... 11 Current measurement values (Display) ................................................................................................................... 11 Main display ............................................................................................................................................................ 11 Operating modes .............................................................................................................................................................. 12 Main display overview ............................................................................................................................................ 12 Operating Mode description ................................................................................................................................... 13 Universal interface (Option) ..................................................................................................................................... 14 Commands ........................................................................................................................................................................ 14 Format ..................................................................................................................................................................... 14 Instruction Set ......................................................................................................................................................... 15 Quick view of commands ........................................................................................................................................ 15 Detailed description of commands ......................................................................................................................... 16 Response String ....................................................................................................................................................... 24 Ext. Control: Computer ............................................................................................................................................. 25 GPIB .................................................................................................................................................................................. 25 Status Word............................................................................................................................................................. 26 ESR-Register - Event-Status-Register....................................................................................................................... 26 RS232 interface ................................................................................................................................................................. 26 Interface Reconfiguration ....................................................................................................................................... 28 RS485 Interface ................................................................................................................................................................. 28 Interface Reconfiguration ....................................................................................................................................... 29

Pin Assignment AI Interface .............................................................................................................................................. 30 Analog Input ..................................................................................................................................................................... 30 Set Point U (USet) ..................................................................................................................................................... 30 Set Point I (ISet) ........................................................................................................................................................ 31 Set Point OVP (UOVP) ................................................................................................................................................ 31 Analog Output .................................................................................................................................................................. 31 Monitor Set Point U (Umon) ...................................................................................................................................... 31 Monitor Set Point I (Imon) ......................................................................................................................................... 31 Monitor Actual Value P (Pmon) ................................................................................................................................. 31 Analog Output OVP (UOVPmon) .................................................................................................................................. 32 Monitor Output Voltage (UIstmon) ............................................................................................................................ 32 Monitor Output Current (IIstmon) .............................................................................................................................. 32 Digital Input ...................................................................................................................................................................... 32 Activation (Ext. Control) .......................................................................................................................................... 32 Soft-Interlock........................................................................................................................................................... 32 Blocking (Standby) ................................................................................................................................................... 32 Digital Output ................................................................................................................................................................... 32 Blocking (Standby) ................................................................................................................................................... 32 Const. Voltage mode (CV) ................................................................................................................................................. 33 Error .................................................................................................................................................................................. 33 Ext. Control: Ethernet (LAN) ......................................................................................................................................33 Manual Assignment of an IP under Microsoft Windows® ................................................................................................ 33 Monitoring the device via browser................................................................................................................................... 34 Controlling the device via Telnet ...................................................................................................................................... 34 Controlling the device via browser ................................................................................................................................... 35 Ext. Control: USB .......................................................................................................................................................35 Interface Reconfiguration ................................................................................................................................................. 35 Data Log Function (Option) ........................................................................................................................................36 Format of the saved Data ................................................................................................................................................. 36 Script Mode ...............................................................................................................................................................36 Executing/Loading a Script ............................................................................................................................................... 36 Commands ........................................................................................................................................................................ 37 Syntax ...................................................................................................................................................................... 37 Quick view of commands ........................................................................................................................................ 37 Detailed description of commands ......................................................................................................................... 37 Controller ..................................................................................................................................................................41 Controller Structure PVsim Mode and User Mode ........................................................................................................... 42 Controller Structure UIP Mode ......................................................................................................................................... 42 Controller Structure UIR Mode ......................................................................................................................................... 42 Controller parameters ...................................................................................................................................................... 43 Sense Mode ...............................................................................................................................................................44 Load connection without Sensor Conductor .................................................................................................................... 44 Load Connection with Sensor conductor .......................................................................................................................... 44 Load Distribution without Sensor Conductor ................................................................................................................... 44 Appendix ...................................................................................................................................................................45 Equivalent leakage current measurement according to VDE 0701 .................................................................................. 45 Notes .........................................................................................................................................................................47

Storage temperature -20 - 70 °C Humidity < 80 % Operating altitude < 2000 m Vibration 10 - 55 Hz/1 min/2G XYZ Shock < 20 G Weight 5 kW 19 kg, 10 kW 26 kg, 15 kW 33 kg INPUT SPECIFICATIONS EPS/MP models (by max output power) 1.2 kW 2.4 kW Connection 3 wire (1P+N+E) AC socket on rear panel IEC-C14 IEC-C20 Input voltage 230 Vac, 50/60 Hz (207-253 Vac 47-63 Hz) Input current 1,2 ≈ 6.5 A ≈ 13 A Inrush transient current2 ≈ 25 A ≈ 25 A Main input fuse rating 10 A 16 A Main input fuse type and location built-in fast acting PCB mounted cartridge fuse Recommended supply breaker value & curve 16 A type D 16 A type D Leakage current ≈ 1.5 mA ≈ 1.5 mA THD input current ≈ 3.75 % ≈ 10.75 % THD input voltage ≈ 1.87 % ≈ 2.55 % Power factor ≈ 0.99 ≈ 0.99 Efficiency type 1 ≈ 88 % (with PFC) ≈ 89 % (with PFC) Dissipated power 1 ≈ 165 W ≈ 350 W OUTPUT SPECIFICATIONS Static voltage regulation ± 0.05 % + 2 mV Static current regulation ± 0.1 % + 2 mA Dynamic regulation < 1-3 ms (typ.) Ripple < 0.2 % RMS (typ.) Stability ± 0.05 % Programming accuracy (Vout) ± 0.05 % +2 mV Programming accuracy (Iout) ± 0.05 % +2 mA Display accuracy (Vout) < ± 0.5% Display accuracy (Iout) < ± 0.5% Isolation 3,000 V Over voltage protection 0 - 120 % Vmax Circuit protection OC/OV/OT/OP Line regulation < ± 0.1 % + 2 mV 1 for nominal output voltage and nominal output current 2 for nominal input voltage

Output type: Open collector with pull-up resistor 10 k after + 5 V Isinkmax: 50 mA Digital inputs (Ext. Control, Standby) Input resistance: 47 kΩ Maximum input voltage: 50 V High level: Ue > 2 V Low level: Ue < 0.8 V Analog outputs (Xmon) Output resistance: 100 Ω Minimum permissible load resistance: 2 kΩ Minimum load resistance for 0.1 % accuracy: 100 kΩ Analog inputs (Xset) Input resistance: 1 MΩ Maximum permissible input voltage: 25 V Reference voltage Reference voltage Uref: 10 V ± 10 mV Output resistance: < 10 Ω Maximum output current: 10 mA (not short-circuit-proof) 5 V - Supply voltage Output voltage: 5 V ± 300 mV Maximum output current: 50 mA (not short-circuit-proof) RS 232 Signal inputs (RxD, CTS) Maximum input voltage: ± 25 V Input resistance: 5 kΩ (Type) Switching thresholds: UH < - 3 V, UL > + 3 V Signal outputs (TxD,RTS) Output voltage (at RLast > 3 kΩ): min ± 5 V, Type ± 9 V, max ± 10 V Output resistance: < 300 Ω Short circuit current: Type ± 10 mA RS 485 Maximum input voltage ± 5 V Input resistance > 12 kΩ Output current ± 60 mA Max High level Ud > 0.2 V Low level Ud < - 0.2 V

IMPORTANT SAFETY INSTRUCTIONS Please read this manual thoroughly before putting the device into operation. Pay regard to the following safety instructions and keep this manual nearby for future purpose. This operating manual is based on the state of technology at the time of printing. However, it is possible that despite regular control and correction, the present document contains printing errors or deficiencies. EPS Stromversorgung GmbH assumes no liability for any technical, printing or translational errors within this manual. INITIAL OPERATION UNPACKING Please make sure that the shipping carton and the packaging is free of damage. If external damage is found, it is important to record the type of damage. Please keep the original packaging to ensure the device is adequately protected in case it needs to be transported in the future or claims for compensation need to be asserted. SETTING UP To avoid electric shocks and product failure, the device should be installed in a temperature and humidity controlled indoor environment. The ambient temperature must not exceed 50 °C. The device must never be exposed to liquids or extreme humidity. VISUAL INSPECTION The unit must be examined immediately for defects or damages in transit. Damages caused during transport may be loose or broken control knobs and bent or broken connectors. Do not use the device if any physical damage is apparent. Please inform the carriers and a representative of EPS Stromversorgung immediately. MAINS OPERATION Make sure to verify the model number and voltage stated on the nameplate. Damages due to wrong power feed are not covered by guarantee conditions. The unit must only be operated when connected directly to the mains. To avoid damage, do not connect the unit to isolating transformers, auto-transformers, magnetic current limiters or similar devices.

Basically, four different operation modes are available: UI mode Unit is operated with current and voltage limitation. UIP mode Unit is operated with current, voltage and power limitation. UIR mode Unit is operated with current, voltage and power limitation. Additionally, the set value for voltage is calculated by means of the present output current to simulate an internal resistance. Table mode Set values for current and voltage are saved in a table. Therefore, UI characteristics can be easily adjusted. There are three different ways to program the table: PVsim mode The UI characteristic of a solar generator is calculated with the Uo, Ik, Umpp and Impp parameters and then written to the table. Memory card The table can be programmed using a script from a memory card. A script is a simple text file (� Script Control). Digital interface The table can be programmed using the digital interface (� Universal Interface, WAVE Command bzw. DAT Command).

Operation), interface (� Universal Interface) or analog/digital IO (� Ext. Control: AI-Interface). In order of priority, commands which have been sent by interface come first, by analog/digital-IO come second and by keyboard come third. For example, if the interface specifies the set point, the corresponding values will be sent to the output, irrespective of other settings. Another easy way to automate functions is offered by script control (� Script Control). A list of commands is saved to the script memory and enables the user to change the chronological sequence of certain settings. The script memory can be programmed via memory card or digital interface. Measurement values of the latest output data are permanently available at all interfaces. Therefore, the present output voltage can be read from the display or via digital interface, while the control of the unit is carried out via analog/digital IO. GENERAL SETTINGS FRONT PANEL DESCRIPTION The picture above shows a schematic view on the front panel of the EPS/MP. There are 3 buttons to control the unit. Basic functions of the control buttons: Standby release or lock the output, quit OVP Display short press: change displayed information, long press: change between main menu and setup menu Select press: change selected menu point, rotate: change selected value CONFIGURATION The configuration menu can be accessed by holding the button Display for at least 1 second. This opens a menu where general settings of the unit can be changed. To browse through the different options, the button Select must be pushed. To change a setting the button Select must be rotated. Setup options: Ulimit 0 V-Vmax; set maximum output voltage which is selectable at the front panel Ilimit 0 V-Vmax; set maximum output current which is selectable at the front panel OVP 0 V- 1.2 x Vmax; set over voltage protection activation value AI-Mode 5 V/10 V; select the AI-control voltage range Remember Last Setting ON/OFF; activate or deactivate the settings memory after a power down the unit The displayed temperature is the temperature of the heat sinks. Temperature 1 is the temperature of the PFC heat sink and temperature 2 is the temperature of the power unit heat sink.

using the rotary pulse encoder Select. Afterwards, the contrast settings will be saved automatically. VOLTAGE SETTINGS ULIMIT AND ILIMIT Ulimit limits the maximum output voltage. The output voltage is limited to the selected value, irrespective of the values that have been set at the front panel or at one of the interfaces. The adjustment range is 0 V up to the maximum rated voltage of the device. Ilimit limits the maximum output current. The output current is limited to the selected value, irrespective of the values that have been set at the front panel or at one of the interfaces. The adjustment range is 0 A up to the maximum rated current of the device. These settings can only be changed at the display and they apply to all interfaces. OVP (OVER VOLTAGE PROTECTION) The output is shut immediately if the output voltage exceeds the selected value. The display indicates this status with the word ‚OVP‘. To reset this error, push the button Standby. The OVP value applies to the front panel operation. There may apply different values for the AI-interface and the digital interface. The digital interface is initialized with the value which has been adjusted on the front panel. The adjustment range is 0 V up to the maximum rated voltage of the device + 20 %. AI-TYPE This feature adjusts the voltage levels of analog input signals and analog output signals. Selectable ranges are 0-5 V and 0-10 V. REMEMBER LAST SETTING If this option is activated (‚On‘), selected parameters will be kept after a blackout. If this option is deactivated (‚Off’), standard setting (0V/0A/UI-Mode) will be loaded after supply voltage is enabled. INTERFACE PARAMETER (OPTION) The display shows all available digital interfaces and their changeable parameters. To see interface parameters, push the button Display for 1 second. Push this button again to see the first interface and its changeable parameters, which can be selected by pushing the rotary pulse encoder and changed by turning the rotary pulse encoder (function of the parameters � Universal Interface).

FRONT PANEL OPERATION DISPLAY AND SETTINGS Current measurement values (Display) In normal mode, pushing the button Display switches between five different overview screens. Main display The main display shows current measure and set values. The display is divided in two separate displays. After enabling the unit, the measured values for output voltage and putput current (position 1 and 2) are displayed. On the right display (position 6) the actual set value (Preset Vset) is shown. To change this value, the rotary pulse encoder Display must be turned. Pushing the button Select, toggles through the next set parameters (in UI mode it will be output current). To open the mode select menu (left display, position 3) where different operation modes are available, the button Select must be pushed again. Selectable parameters according to operation mode: U Output voltage I Ouput current P Output power (UIP mode only � UIP mode) Ri Internal resistance (UIR mode only � UIR mode) Umpp MPP voltage (PVsim mode only � PVsim mode) Impp MPP current (PVsim mode only � PVsim mode) Selectable options in current control mode (left display, position 5): Loc Front panel operation Scr Memory card operation AI Analog interface operation Rem Interface operation LLO Interface operation , Front panel operation locked Dis Unit locked via interlock input (option) Available modes for operating status of the unit (left display, position 4): STB Standby mode CV Voltage limitation mode C Current limitation mode CP Power limitation mode OVP Deactivation of the unit by over voltage protection Available operation modes of the unit (left display, position 3): UI Voltage and current limitation UIP Voltage, current and power limitation UIR Voltage and current limitation, simulated internal resistance PVsim Simulation of a photovoltaic characteristic User Simulation of a user-defined characteristic

12 OPERATING MODES Main display overview Main display 1 After power up, the display shows the actual output voltage and output current. Main display 2 After pushing the button Select once, actual output voltage and output power are shown on the display. Main display 3 After pushing the button Select twice, actual output power and output current are shown on the display. Main display 4 After pushing the button Select thrice, actual output voltage and output current are shown on the left display and actual output power (P = U * I) and load resistor (R = V ÷ C) are shown on the right display. The values for power and resistor will be calculated from the actual values of the output voltage and the output current. Main display 5/diagram screen After pushing the button Select four times, actual output voltage and output current are shown on the left display. The output characteristic of the power supply is shown on the right display. The X-axis shows the output voltage and the Y-axis shows the output current. The picture above shows the UIR mode of the power supply. The dot marks the actual operation point of the unit. The diagram is always scaled for the maximum allowed output current (this value can be set in the setup menu (Ilimit)) and the maximum allowed output voltage (this value can be set in the setup menu (Ulimit)).

Operating Mode description UI Mode In UI mode, the set values for voltage and current are transferred directly to the switch mode regulator. There is no additional digital control. UIP Mode In UIP mode, the set values for voltage and current are transferred directly to the switch mode regulator. If the output current exceeds the previously adjusted limit value, the current set point will be regulated. UIR Mode In UIR mode, the voltage set point is regulated in a way that a power supply unit with (adjustable) internal resistance is simulated. The set value for current limiting is transferred directly to the switch mode regulator. PVsim Mode In PVsim mode, the diagram of a PV generator is simulated. Given values are open-circuit voltage Uo, short-circuit current Ik, as well as the amounts of voltage and current by which the PV generator delivers the maximum power (Umpp, Impp). Parameters can be found in the specification sheet of the simulated PV generator. Values for Umpp may be in a range from 0.6 to 0.95 * U. Values for Impp may be in a range from 0.6 to 0.95 * I. Script Mode In script mode, the unit is controlled by memory card. The display status ‚Mode‘ shows the present operating mode ‚UI‘. The lower right corner of the display shows the word ‚Scr‘, which indicates that script operation was selected. If there is no memory card in the slot, this option cannot be selected. For detailed information about memory card control and about how to build up a script, see � Script Control.

14 UNIVERSAL INTERFACE (OPTION) All interfaces of the digital interface are equal. There is no shift between the interfaces. For example, the first command can be issued via the IEEE interface while the second command can be issued via the RS232 interface. The return values will be sent from that interface the command was issued from. COMMANDS Communication is based on an ASCII protocol. The following chapters describe how to write a command and give an overview over the commands. Format A command consists of the command word, a parameter (if necessary) and a terminator. The character for the terminator is Carriage Return or Line Feed . Character ASCII Dec value Hex value Carriage Return 13 0d Line Fee 10 0a If the command contains a or character, it will not be processed. Therefore, a command can be cancelled while entering. Though, a terminator ( or ) is necessary. Character ASCII Dec value Hex value Escape 27 1b Delete 127 7f Commands are not case sensitive and may be mixed up. Therefore, the effect of the following commands is the same: GTL, Gtl, gTL. Decimal places are optional and separated by a full stop ‘.‘ . The number of decimal places is not limited. Therefore, the effect of the following commands is the same: UA,10, UA,10.0, UA,10.000000000, UA,0010, UA,010.0000 The number of decimal places to be analyzed depends on parameter and unit type. It corresponds to the number of decimal places, a command without a parameter would return. As a rule, decimal places are analyzed until a resolution of 0.1% is reached. Example: Evaluation of decimal places EPS/MP with 600 V, 25 A 600 V * 0.1 % = 0.6 V � one decimal place 25 A * 0.1 % = 0.025 A � three decimal places Optional, after a numerical value, a letter may be added to indicate the unit. However, this letter will not be analyzed. Example: Attached letter as unit UA,10.0 V � Resets output voltage to 10 V UA,10.0 m � Caution! The ‚m‘ will not be evaluated, output voltage here is also 10 V Example: A valid command with corresponding hex values U A , 1 0 . 2 55 h 41 h 2 ch 31 h 30 h 2 eh 32 h 0 dh Example: Adjustment of output voltage 10 V/5 A (full command sequence) OVP,100 � adjusts OVP to 100 V UA,10 � adjusts output voltage to 10 V IA,5 � current limiting 5 A SB,R � output enabled

Instruction Set The IEEE-488.2 standard demands several basic commands. Some commands may occur twice for compatibility reasons (once in the EPS version and once in the (old) IEEE-488.2 version). The following syntax is used to describe the commands: [] Square brackets � optional parameter <> Angle bracket � numerical value {} Curly bracket � selection list | Vertical line � separator within selection list Example GTR[,{0|1|2}] means that the command GTR can be used with or without parameters. If a parameter exists, it has to be 1, 2 or 3. Valid commands are: GTR GTR,1 GTR,2 GTR,3 IA[,] means that the command IA can be used either with or without parameters. If a parameter exists, it has to be a numerical value. Quick view of commands Command Description Result CLS* or CLS Clear Status Deletes the status byte DAT,, DIP Data for user-defined characteristic DCL Device Clear Initialization data reset GTL Go To Local Activates front panel operation GTR[,{0|1|2}] Go To Remote Activates digital interface operation IA[,] Set Imax Adjusts current limiting ID or *IDN? Identification Displays identification string IMPP[,] Set Impp Adjusts MPP current during PVsim mode. LLO Local Lockout Deactivates LOCAL button LIMI Limit Ia Reads maximum adjustable current limitation LIMP Limit Pa Reads maximum unit output. LIMR Limit R Reads adjustable range for Ri within UIR mode. LIMRMAX Limit Rmax Reads maximum adjustable range for Ri within UIR mode. LIMRMIN Limit Rmin Reads minimum adjustable range for Ri within UIR mode. LIMU Limit Ua Reads maximum adjustable voltage limitation MODE[,{UI|UIP|UIR|PVSIM| USER|Skript}] Set Mode Selects operation mode MU[,] Measure Ua Measures present output voltage MI[,] Measure Ia Measures present output current *OPT? Optional Identification Query Displays units current hardware/software version OVP[,] Overvoltage Protection Adjusts over voltage protection PA[,] Set Pmax Adjusts power limitation PCx[,,, ,, ,, ] Program Communication Adjusts the interfaces RA[,] Set Ri Adjusts internal resistance REGLER[,,,, ] Controller Parameters Adjusts controller parameters for UIP, UIR and PVsim mode RI or *RST Reset Instrument Resets hardware (no return value) SB[,{S|R|1|0}] Standby Enables/blocks the output SCR[,[,]] Load Script Programming of script memory SS or *PDU Save Setup Saves previously made channel and interface parameter adjustments (no return value) STATUS Status Query of the units status (return values in binary format) (also see following table) STB or *STB? Interface Status UA[,] Set Ua Adjusts output voltage (if there are no parameters, present set point is displayed) UMPP[,] Set Umpp Adjusts MPP voltage in PVsim mode (if there are no parameters, present set point is displayed) WAVE End Userwave Data Ends transfer of user-defined output characteristic (gradual interpolation of intermediate values) WAVELIN End Userwave Data Ends transfer of user-defined output characteristic (linear interpolation of intermediate values) WAVERESET,, Start Userwave Data Starts transfer of user-defined output characteristic