EPS ELR 9000 Series Operating Manual
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EPS ELR 9000 Series Operating Manual

Electronic dc load with energy recovery
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Operating Manual
ELR 9000
Electronic DC Load with
Energy Recovery
Attention! This document is only
valid for devices with firmwares
"KE: 2.11", "HMI: 2.03" and "DR:
1.6.3" or higher. For availability
of updates for your device check
our website or contact us.
Doc ID: ELR9TEN
Revision: 03
Date: 10/2015

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Summary of Contents for EPS ELR 9000 Series

  • Page 1 Operating Manual ELR 9000 Electronic DC Load with Energy Recovery Attention! This document is only valid for devices with firmwares “KE: 2.11”, “HMI: 2.03” and “DR: Doc ID: ELR9TEN 1.6.3” or higher. For availability of updates for your device check Revision: 03 our website or contact us.

  • Page 3: Table Of Contents

    ELR 9000 Series TABLE OF CONTENTS GENERAL 2.3.9 Installation of an AnyBus interface module .32 About this document ........5 2.3.10 Connecting the analog interface ....33 1.1.1 Retention and use ..........5 2.3.11 Connecting the USB port (rear side) ...33 1.1.2 Copyright ............5 2.3.12 Initial commission .........34...
  • Page 4 ELR 9000 Series 3.9.7 Rectangular function ........61 3.9.8 Trapezoidal function ........62 3.9.9 DIN 40839 function ........62 3.9.10 Arbitrary function ..........63 3.9.11 Ramp function ..........67 3.9.12 UI and IU table functions (XY table) ....67 3.9.13 Remote control of the function generator..68 3.10...

  • Page 5: General

    Limit of liability All statements and instructions in this manual are based on current norms and regulations, up-to-date technology and our long term knowledge and experience. EPS Stromversorgung accepts no liability for losses due to: • Usage for purposes other than defined • Use by untrained personnel...

  • Page 6: Disposal Of Equipment

    A piece of equipment which is intended for disposal must, according to European laws and regulations (ElektroG, WEEE) be returned to EPS Stromversorgung for scrapping, unless the person operating the piece of equipment or another, delegated person is conducting the disposal. Our equipment falls under these regulations and is ac-...

  • Page 7: Safety

    ELR 9000 Series Safety 1.7.1 Safety notices Mortal danger - Hazardous voltage • Electrical equipment operation means that some parts will be under dangerous voltage. Therefore all parts under voltage must be covered! • All work on connections must be carried out under zero voltage (input not connected to voltage sources) and may only be performed by qualified and informed persons.

  • Page 8: Responsibility Of The Operator

    ELR 9000 Series 1.7.3 Responsibility of the operator Operator is any natural or legal person who uses the equipment or delegates the usage to a third party, and is responsible during its usage for the safety of the user, other personnel or third parties.

  • Page 9: Alarm Signals

    ELR 9000 Series 1.7.5 Alarm signals The equipment offers various possibilities for signalling alarm conditions, however, not for danger situations. The signals may be optical (on the display as text) acoustic (piezo buzzer) or electronic (pin/status output of an analog interface).

  • Page 10: Specific Technical Data

    ELR 9000 Series 1.8.3 Specific technical data Model 3.5 kW ELR 9080-170 ELR 9250-70 ELR 9500-30 ELR 9750-22 AC Input/Output Input/output voltage 195...253 V L-N 195...253 V L-N 195...253 V L-N 195...253 V L-N Input/output connection L,N,PE L,N,PE L,N,PE L,N,PE Input/output frequency 50/60 Hz ±10%...
  • Page 11 ELR 9000 Series Model 3.5 kW ELR 9080-170 ELR 9250-70 ELR 9500-30 ELR 9750-22 Analog interface Set value inputs U, I, P, R Actual value output U, I Control signals DC on/off, Remote on/off, R mode on/off Status signals CV, OVP, OT Galvanic isolation to the device max.

  • Page 12: Elr 9080-340

    ELR 9000 Series Model 7 kW ELR 9080-340 ELR 9250-140 ELR 9500-60 ELR 9750-44 ELR 91000-30 AC Input/Output 195...253 V L-N 195...253 V L-N 195...253 V L-N 195...253 V L-N 195...253 V L-N Input/output voltage 340...440 V L-L 340...440 V L-L 340...440 V L-L...
  • Page 13 ELR 9000 Series Model 7 kW ELR 9080-340 ELR 9250-140 ELR 9500-60 ELR 9750-44 ELR 91000-30 Analog interface Set value inputs U, I, P, R Actual value output U, I Control signals DC on/off, Remote on/off, R mode on/off Status signals...

  • Page 14: Elr 9080-510

    ELR 9000 Series Model 10.5 kW ELR 9080-510 ELR 9250-210 ELR 9500-90 ELR 9750-66 ELR 91500-30 AC Input/Output 195...253 V L-N 195...253 V L-N 195...253 V L-N 195...253 V L-N 195...253 V L-N Input/output voltage 340...440 V L-L 340...440 V L-L 340...440 V L-L...
  • Page 15 ELR 9000 Series Model 10.5 kW ELR 9080-510 ELR 9250-210 ELR 9500-90 ELR 9750-66 ELR 91500-30 Analog interface Set value inputs U, I, P, R Actual value output U, I Control signals DC on/off, Remote on/off, R mode on/off Status signals...

  • Page 16: Views

    ELR 9000 Series 1.8.4 Views Figure 1 - Front side Figure 2 - Back side of standard version EPS Stromversorgung GmbH Fon: +49 821 / 570451-0 www.eps-germany.de Page 16 Alter Postweg 101 • 86159 Augsburg Fax: +49 821 / 570451-25 info@eps-germany.de...
  • Page 17 ELR 9000 Series EPS Stromversorgung GmbH Fon: +49 821 / 570451-0 www.eps-germany.de Page 17 Alter Postweg 101 • 86159 Augsburg Fax: +49 821 / 570451-25 info@eps-germany.de Germany...
  • Page 18 ELR 9000 Series Figure 5 - View from above EPS Stromversorgung GmbH Fon: +49 821 / 570451-0 www.eps-germany.de Page 18 Alter Postweg 101 • 86159 Augsburg Fax: +49 821 / 570451-25 info@eps-germany.de Germany...
  • Page 19 ELR 9000 Series Figure 6 - Control Panel Overview of the elements of the operating panel For a detailed description see section „1.9.6. The control panel (HMI)“ and „1.9.6.2. Rotary knobs“. Touchscreen display Used for selection of set values, menus, conditions and display of actual values and status.

  • Page 20: Construction And Function

    General description The electronic high performance loads of the ELR 9000 series are especially suitable for test systems and industrial controls due to their compact construction of a 19” enclosure with 3 height units (3U). Apart from basic functions of electronic loads, set point curves can be produced in the integrated function generator (sine, rectangular, triangular and other curve types).

  • Page 21: Scope Of Delivery

    ELR 9000 Series 1.9.3 Scope of delivery 1 x Electronic load device 1 x Printed operating manual 1 x Share Bus plug 1 x Remote sensing plug 1 x 1.8 m USB cable 1 x Set of DC terminal cover(s) 1 x CD “Drivers &...

  • Page 22: The Control Panel (Hmi)

    ELR 9000 Series 1.9.6 The control panel (HMI) The HMI (Human Machine Interface) consists of a display with touchscreen, two rotary knobs, a button and a USB-A port. 1.9.6.1 Touchscreen display The graphic touchscreen display is divided into a number of areas. The complete display is touch sensitive and can be operated by finger or stylus to control the equipment.
  • Page 23 ELR 9000 Series • Status display (upper right) This area displays various status texts and symbols: Display Description Locked The HMI is locked Unlocked The HMI is unlocked Remote: The device is under remote control from..Analog ..the built-in analog interface USB &...
  • Page 24 ELR 9000 Series 1.9.6.4 Resolution of the displayed values In the display, set values can be adjusted in variable increments. The number of decimal places depends on the device model. The values have 3 to 5 digits. Actual and set values always have the same number of digits.

  • Page 25: Usb-Port Type B (Back Side)

    PC (USB 2.0 or 3.0). The driver is delivered on the included CD and installs a virtual COM port. Details for remote control can be found on the web site of EPS Stromversorgung or on the included CD. A general programming introduction for the USB port is available...

  • Page 26: Share" Connector

    ELR 9000 Series 1.9.10 “Share” connector The 2 pole socket (“Share”) on the back side of the device is provided for connection to equally named sockets on compatible electronic loads when establishing parallel connection where symmetric current distribution is required, as well as compatible power supplies to build a two-quadrants operation setup.

  • Page 27: Installation & Commissioning

    2.1.2 Packaging It is recommended to keep the complete transport packaging for the lifetime of the device for relocation or return to EPS Stromversorgung for repair. Otherwise the packaging should be disposed of in an environmentally friendly way. 2.1.3 Storage In case of long term storage of the equipment it is recommended to use the original packaging or similar.

  • Page 28: Preparation

    Preparation Mains connection of an energy back-feeding electronic load of ELR 9000 series is done via the included 5 pole plug on the back of the device. Wiring of the plug is at least 3 strand or, for some models, 5 strand of suitable cross section and length.

  • Page 29: Mains Connection (Ac)

    ELR 9000 Series 2.3.4 Mains connection (AC) • Connection to an AC mains supply may only be carried out by qualified personnel! • Cable cross section must be suitable for the maximum input/output current of the device (see table below)! • Before plugging in the input plug ensure that the device is switched off by its mains switch!

  • Page 30: Connection To Dc Sources

    ELR 9000 Series 2.3.5 Connection to DC sources In the case of a device with a high nominal current and hence a thick and heavy DC connec- tion cable it is necessary to take account of the weight of the cable and the strain imposed on the DC connection.

  • Page 31: Grounding Of The Dc Input

    ELR 9000 Series Examples of the type 1 terminal: • 90 ° up or down • space saving in depth • no bending radius • horizontal lead • space saving in height • large bending radius 2.3.6 Grounding of the DC input Individually operated devices can always be grounded from the DC minus pole, i.e.

  • Page 32: Connecting The "Share" Bus

    ELR 9000 Series 2.3.8 Connecting the “Share” bus The “Share” bus connector on the back side is intended to balance the current of multiple units in parallel opera- tion, especially when using the integrated function generator of the master unit. Alternatively, it can be connected to a compatible power supply, in order to run a two-quadrants operation.

  • Page 33: Connecting The Analog Interface

    For Windows 10 users: this Windows version installs a default driver for CDC devices (see above), which then are all listed as “USB Serial Port” and not as “ELR 9000 Series” in the Windows Device Manager. In order to prevent that, you can install the driver (*.inf or installer *.exe) prior to connecting the USB.

  • Page 34: Initial Commission

    ELR 9000 Series 2.3.12 Initial commission For the first start-up after purchasing and installing the device, the following procedures have to be executed: • Confirm that the connection cables to be used are of a satisfactory cross section! • Check if the factory settings of set values, safety and monitoring functions and communication are suitable for your intended application of the device and adjust them if required, as described in the manual! • In case of remote control via PC, read the additional documentation for interfaces and software!

  • Page 35: Operation And Application

    ELR 9000 Series Operation and application Personal safety • In order to guarantee safety when using the device, it is essential that only persons operate the device who are fully acquainted and trained in the required safety measures to be taken when working with dangerous electrical voltages • For models which accept dangerous voltages, the included DC terminal cover, or an equivalent,...

  • Page 36: Resistance Regulation / Constant Resistance

    ELR 9000 Series 3.2.3 Resistance regulation / constant resistance Inside electronic loads, whose operating principle is based on a variable internal resistance, constant resistance mode (CR) is almost a natural characteristic. The load attempts to set the internal resistance to the user defined value by determining the input current depending on the input voltage according to Ohm’s law I...

  • Page 37: Alarm Conditions

    ELR 9000 Series Alarm conditions This section only gives an overview about device alarms. What to do in case your device indi- cates an alarm condition is described in section „3.6. Alarms and monitoring“. As a basic principle, all alarm conditions are signalled optically (text + message in the display), acoustically (if activated) and as a readable status and alarm counter via the digital interface.

  • Page 38: Manual Operation

    ELR 9000 Series Manual operation 3.4.1 Powering the device The device should, as far as possible, always be switched on using the rotary switch on the front of the device. Alternatively this can take place using an external cutout (contactor, circuit breaker) of suitable current capacity.
  • Page 39 ELR 9000 Series EPS Stromversorgung GmbH Fon: +49 821 / 570451-0 www.eps-germany.de Page 39 Alter Postweg 101 • 86159 Augsburg Fax: +49 821 / 570451-25 info@eps-germany.de Germany...
  • Page 40 ELR 9000 Series EPS Stromversorgung GmbH Fon: +49 821 / 570451-0 www.eps-germany.de Page 40 Alter Postweg 101 • 86159 Augsburg Fax: +49 821 / 570451-25 info@eps-germany.de Germany...
  • Page 41 ELR 9000 Series EPS Stromversorgung GmbH Fon: +49 821 / 570451-0 www.eps-germany.de Page 41 Alter Postweg 101 • 86159 Augsburg Fax: +49 821 / 570451-25 info@eps-germany.de Germany...
  • Page 42 ELR 9000 Series 3.4.3.1 Menu “General Settings” Setting P. Description Allow remote control Selection “NO” means that the device cannot be remotely controlled over either the digital or analog interfaces. If remote control is not allowed, the status will be shown as “Local”...
  • Page 43 ELR 9000 Series 3.4.3.2 Menu “User Events” See „3.6.2.1 User defined events“ on page 56. 3.4.3.3 Menu “Profiles” See „3.8 Loading and saving a user profile“ on page 57. 3.4.3.4 Menu “Overview” This menu page displays an overview of the set values (U, I, P or U, I, P, R) and alarm settings as well as adjust- ment limits.
  • Page 44 ELR 9000 Series IF Level 1 Description Node Address Selection of the Profibus or node address of the device within range 1...125 via direct input Function Tag String input box for a user-definable text which describes the Profibus slave function tag.
  • Page 45 ELR 9000 Series IF Level 1 Level 2 Description Node Address Selection of the CANopen node address in the range 1...127 via direct input Baud Rate AUTO Automatic detection of the bus baud rate.(speed) Automatically sets baud rate and node address Manual Manual selection of the baud rate that is used by the CANopen interface.

  • Page 46: Adjustment Limits

    ELR 9000 Series 3.4.4 Adjustment limits Adjustment limits are only effective on the related set values, no matter if using manual adjustment or remote control! Defaults are, that all set values (U, I, P, R) are adjustable from 0 to 100%.

  • Page 47: Manual Adjustment Of Set Values

    ELR 9000 Series 3.4.6 Manual adjustment of set values The set values for voltage, current, power and resistance are the fundamental operating possibilities of an elec- tronic load and hence the two rotary knobs on the front of the device are always assigned to two of the four values in manual operation.

  • Page 48: Switching The Dc Input On Or Off

    ► How to remotely switch the DC input on or off via the digital interface See the external documentation “Programming Guide ModBus & SCPI” if you are using custom software, or refer to the external documentation of LabView VIs or other documentation provided by EPS Stromversorgung. EPS Stromversorgung GmbH Fon: +49 821 / 570451-0 www.eps-germany.de...

  • Page 49: Remote Control

    ELR 9000 Series Remote control 3.5.1 General Remote control is possible via the built-in analog or USB port or via one of the optional interface modules (AnyBus CompactCom, only with standard models of ELR series) or via the GPIB port (only with option 3W installed). Important here is that only the analog or one digital interface can be in control.

  • Page 50: Remote Control Via The Analog Interface (Ai)

    Programming details for the interfaces, the communication protocols etc. are to be found in the documentation “Programming Guide ModBus & SCPI“ which is supplied on the included CD or which is available as download from the EPS Stromversorgung website. 3.5.4 Remote control via the analog interface (AI) 3.5.4.1...
  • Page 51 ELR 9000 Series 3.5.4.2 Acknowledging device alarms Device alarms (see 3.6.2) are always indicated in the front display and some of them are also reported as signal on the analog interface socket (see table below). In case of a device alarm occurring during remote control via analog interface, the DC input will be switched off the same way as in manual control.
  • Page 52 ELR 9000 Series 3.5.4.4 Overview of the Sub-D Socket 3.5.4.5 Simplified diagram of the pins Digital Input (DI) Analog Input (AI) It requires to use a switch with low resist- High resistance input (impedance V~0.5 ance (relay, switch, circuit breaker etc.) in >40 k..100 kΩ) for an OA circuit.
  • Page 53 ELR 9000 Series • Remote control is not active In this mode of operation pin “REM-SB” can serve as lock, preventing the DC input from being switched on by any means. This results in following possible situations: Parameter  Behaviour input „REM-SB“...

  • Page 54: Alarms And Monitoring

    ELR 9000 Series Alarms and monitoring 3.6.1 Definition of terms There is a clear distinction between equipment alarms (see „3.3. Alarm conditions“) such as overvoltage or over- heating, and user defined events such as e.g OVD overvoltage monitoring. Whilst device alarms serve to protect the device by initially switching off the DC input, user defined events can switch off the DC input (Action = ALARM), but can also simply give an acoustic signal to make the user aware.
  • Page 55 ELR 9000 Series Some device alarms are configurable: Alarm Meaning Description Range Indication OverVoltage Triggers an alarm if the DC input voltage reaches the Display, analog 0 V...1.1*U Protection defined threshold. The DC input will be switched off. IF, digital IF...
  • Page 56 ELR 9000 Series 3.6.2.1 User defined events The monitoring functions of the device can be configured for user defined events. Default is that this is deactivated (action = NONE). The following events can be configured independently and can, in each case, trigger the actions NONE, SIGNAL, WARNING or ALARM.

  • Page 57: Control Panel (Hmi) Lock

    ELR 9000 Series Control panel (HMI) lock In order to avoid the accidental alteration of a value during manual operation, the rotary knobs or the touchscreen can be locked so that no alteration of values will be accepted without prior unlocking.

  • Page 58: The Function Generator

    ELR 9000 Series The function generator 3.9.1 Introduction The built-in function generator is able to create various signal forms and apply these to the set value of voltage or current. In manual operation, all generator functions are available for access on the front panel. In remote control, only the customisable arbitrary generator and a XY function are available.

  • Page 59: Manual Operation

    ELR 9000 Series 3.9.4 Manual operation 3.9.4.1 Function selection and control Via the touchscreen one of the functions described above can be called up, configured and controlled. Selection and configuration are only possible when the input is switched off. ► How to select a function and adjust parameters Tap the touch area on the main screen.

  • Page 60: Sine Wave Function

    ELR 9000 Series ► How to start and stop a function The function can be started either by tapping or pushing the “On/Off” button, if the DC input is currently switched off. The function then starts immediately. In case START is used while the DC input is still switched off, the DC input will be switched on automatically.

  • Page 61: Rectangular Function

    ELR 9000 Series Schematic diagram: Application and result: A triangular wave signal for input current (direct) or input voltage (indirect) is generated. The positive and negative slope times are variable and can be set independently. The offset shifts the signal on the Y-axis.

  • Page 62: Trapezoidal Function

    ELR 9000 Series 3.9.8 Trapezoidal function The following parameters can be configured for a trapezoidal curve function: Value Range Description I(A), U(A) 0...(Nominal value - (Off)) of U, I A = Amplitude of the signal to be generated I(Off), U(Off) 0...(Nominal value - (A)) of U, I...

  • Page 63: Arbitrary Function

    ELR 9000 Series 3.9.10 Arbitrary function The arbitrary (freely definable) function offers the user further scope. Up to 100 sequences are available for use for current I and voltage U, all of which have the same parameters but which can be differently configured so that a complex function process can be built up.
  • Page 64 ELR 9000 Series Schematic diagram: Applications and results: Example 2 Focussing 1 cycle of 1 sequence from 100: The DC values at start and end are the same but the AC (amplitude) not. The end value is higher than the start so that the amplitude increases with each new half sine wave continuously through the sequence.
  • Page 65 ELR 9000 Series By linking together a number of differently configured sequences, complex progressions can be created. Smart configuration of the arbitrary generator can be used to match triangular, sine, rectangular or trapezoidal wave func- tions and thus, e.g. a sequence of rectangular waves with differing amplitudes or duty cycles could be produced.
  • Page 66 ELR 9000 Series 3.9.10.1 Loading and saving the arbitrary function The 100 sequences of the arbitrary function, which can be manually configured with the control panel of the device and which are applicable either to voltage (U) or current (I), can be saved to or loaded from a common USB flash drive via the front side USB port.

  • Page 67: Ramp Function

    ELR 9000 Series ► How to save a sequence table (100 sequences) to a USB flash drive: Do not plug the USB flash drive yet or remove it. Access the function selection menu of the function generator via MENU -> Function Generator -> Arbitrary...

  • Page 68: Remote Control Of The Function Generator

    ELR 9000 Series Uploading of a table from a USB flash drive must use text files in CSV format (.csv). Plausibil- ity is checked on loading (values not too high, number of values correct),and possible errors reported in which case the table will not be loaded.

  • Page 69: Other Applications

    ELR 9000 Series 3.10 Other applications 3.10.1 Series connection Series connection is not a permissible operating method for electronic loads and must not be installed or operated under any circumstances! 3.10.2 Parallel operation in master-slave (MS) Multiple devices of same kind and model can be connected in parallel in order to create a system with higher total current and hence higher power.
  • Page 70 ELR 9000 Series 3.10.2.4 Wiring and set-up of the master-slave bus The master-slave connectors are built-in and must first be connected via network cables (≥CAT3, patch cable) and then MS can be configured manually (recommended) or by remote control. The following applies: • Type of connection: RS485 with 115200Bd...
  • Page 71 ELR 9000 Series ► Step 3: Initialising the master The master unit and the whole master-slave system still need to be initialised. In the main screen of the master unit, after quitting the setting menus, a pop-up will appear: Tapping INITIALIZE will cause the unit to search again for slaves and then to configure itself for set and actual values accordingly.
  • Page 72 ELR 9000 Series 3.10.2.6 Alarms and other problem situations Master-slave operation, due to the connection of multiple units and their interaction, can cause additional problem situations which do not occur when operating individual units. For such occurrences the following regulations have been defined: • Generally, if the master loses connection to any slave, it will generate an MSP (master-slave protection) alarm,...

  • Page 73: Two Quadrants Operation (2Qo)

    ELR 9000 Series 3.10.3 Two quadrants operation (2QO) 3.10.3.1 Introduction This kind of operation refers to the use of a source, in this case a power sup- ply from a compatible series (see section „1.9.10. “Share” connector“) and a sink, in this case a series ELR 9000 electronic load. The source and the sink...
  • Page 74 ELR 9000 Series Configuration C: E-LOAD n PSU n Multiple e-loads and multiple power supplies for increased total performance, plus 1 test object (E.U.T). The combination of load units and power supply units each create a block, a system with certain power. Here it is also...

  • Page 75: Servicing And Maintenance

    Contact the supplier in case of suspicion and elicit the steps to be taken. It will then usually be necessary to return the device to EPS Stromversorgung (with or without warranty). If a return for checking or repair is to be carried out, ensure that: • the supplier has been contacted and it is clarified how and where the equipment should be sent.

  • Page 76: Firmware Updates

    ELR 9000 Series Firmware updates 4.3.1 Update of the control panel unit (HMI) Firmware updates should only be installed when they can eliminate existing bugs in the firm- ware in the device or contain new features. The firmware of the control panel (HMI), if necessary, is updated via the rear side USB port. For this the software “EA Power Control”...

  • Page 77: Calibration

    ELR 9000 Series Calibration 4.4.1 Preface The devices of series ELR 9000 feature a function to re-adjust the most important input values when doing a calibration and in case these values have moved out of tolerance. The re-adjustment is limited to compensate small differences of up to 1% or 2% of the max.
  • Page 78 ELR 9000 Series ► How to calibrate the voltage Adjust the connected voltage source to approx. 102% of the maximum voltage specified for the ELR device. For the example with an 80 V ELR this would be 81.6 V for the source. Set the current limitation of the voltage source to 5% of the nominal current specified for ELR device, for this example it is 8.5 A.

  • Page 79: Accessories And Options

    Service & Support General Repairs, if not otherwise arranged between supplier and customer, will be carried out by EPS Stromversorgung. For this the equipment must generally be returned to the manufacturer. No RMA number is needed. It is sufficient to package the equipment adequately and send it, together with a detailed description of the fault and, if still under guarantee, a copy of the invoice, to the following address.

This manual is also suitable for:

Elr 9080-170Elr 9250-70Elr 9500-30Elr 9750-22Elr 9080-340Elr 9250-140 ... Show all

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