Bender ISOMETER isoPV1685DP Manual
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Bender ISOMETER isoPV1685DP Manual

Bender ISOMETER isoPV1685DP Manual

Insulation monitoring device for unearthed photovoltaic systems
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Manual EN
ISOMETER® isoPV1685DP
Insulation monitoring device for unearthed photovoltaic systems
isoPV1685DP_D00479_02_M_XXEN/02.2025

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Summary of Contents for Bender ISOMETER isoPV1685DP

  • Page 1 Manual EN ISOMETER® isoPV1685DP Insulation monitoring device for unearthed photovoltaic systems isoPV1685DP_D00479_02_M_XXEN/02.2025...
  • Page 2 isoPV1685DP_D00479_02_M_XXEN/02.2025...

  • Page 3: Table Of Contents

    Indication of important instructions and information...............5 Service and Support............................5 Training courses and seminars........................5 Delivery conditions............................5 Inspection, transport and storage......................6 Warranty and liability.............................6 Disposal of Bender devices..........................6 Safety..................................7 Function..........................8 Intended use..............................8 Product description............................8 Device features..............................8 Functional description...........................
  • Page 4 Table of contents Display..........................27 Standard display............................27 Fault display (active)............................ 27 Fault display (inactive)..........................28 Acknowledging a fault message......................29 History memory............................. 29 Data - isoGraph.............................. 29 Insulation fault location..........................30 Settings..........................32 Operating and navigating......................... 32 Menu overview isoPV1685DP........................34 Settings in the device menu........................36 8.3.1 Alarm settings..............................36...

  • Page 5: General Information

    Regular face-to-face or online seminars for customers and other interested parties: www.bender.de > know-how > seminars. Delivery conditions The conditions of sale and delivery set out by Bender GmbH & Co. KG apply. These can be obtained in printed or electronic format. isoPV1685DP_D00479_02_M_XXEN/02.2025...

  • Page 6: Inspection, Transport And Storage

    Bender GmbH & Co. KG is registered in the waste from electrical and electronic equipment (WEEE) register under the WEEE number: DE 43 124 402. For more information on the disposal of Bender devices, refer to www.bender.de > service & support.

  • Page 7: Safety

    ISOMETER® isoPV1685DP Safety If the device is used outside the Federal Republic of Germany, the applicable local standards and regulations must be complied with. In Europe, the European standard EN 50110 applies. DANGER Risk of fatal injury due to electric shock! Touching live parts of the system carries the risk of: •...

  • Page 8: Function

    Function Function Intended use The device isoPV1685DP is used for insulation monitoring of large photovoltaic systems up to AC 1000 V and DC 1500 V designed as IT systems. The measurement method specially developed for slow voltage fluctuations (MPP tracking) monitors the insulation resistance even in systems equipped with large solar generator panels where extremely high system leakage capacitances against earth exist due to interference suppression methods.

  • Page 9: Functional Description

    • Graphical representation of the insulation resistance over time (isoGraph) Interfaces • RS-485 interface for data exchange with other Bender devices • Remote setting of certain parameters via the Internet (COMTRAXX® gateway) • Remote diagnosis by the Bender service via the Internet •...

  • Page 10: Insulation Fault Location

    Function An insulation fault between the PV system and earth closes the measuring circuit. If the insulation resistance between system and earth falls below the set response values R and R , the associated alarm relays K1 or K2 switch. The response value R can be set equal or higher than R .

  • Page 11: History Memory

    ISOMETER® isoPV1685DP Activation or deactivation is done via • a digital input • the menu item Alarm settings • the BMS bus and Modbus RTU The standby mode of the ISOMETER®, for example, enables application in coupled systems, since in interconnected systems only one insulation monitoring device may be connected.
  • Page 12 Function • Watchdogs • Oscillator • Only when started via RS-485: Restart of the device including re-initialisation, recalibration and switching of all alarm relays • Connection monitoring of the PV system NOTE Perform a manual self-test via the interface at regular intervals specified by the operator to ensure that the device is operating correctly.

  • Page 13: Device Overview

    ISOMETER® isoPV1685DP Device overview Dimensions Img.: Dimensions in mm isoPV1685DP_D00479_02_M_XXEN/02.2025...

  • Page 14: Terminals

    Device overview Terminals Img. 3-1: Terminals from below Img. 3-2: Terminals from above View from below I2+, I2− Digital input: no function I1+, I1− Digital input: Start insulation fault location in manual mode starts manual self test CAN1, CAN2 No function RS485 Term.

  • Page 15: Display And Operating Elements

    ISOMETER® isoPV1685DP Display and operating elements The device display shows information regarding the device and the measurements. ON (green) Operation indicator PGH ON flashes during insulation fault location. It indicates that the locating current for the insulation fault (yellow) location is being generated. SERVICE Lights up when an internal device error is detected.
  • Page 16 Device overview Service lid Access to DIP switch and to the SD card via the service lid Open the service lid by pressing gently on the ribbed surface and pulling the lid from the enclosure away. After removing the lid the following settings can be carried out: •...

  • Page 17: Mounting

    ISOMETER® isoPV1685DP Mounting Mount the device using four M5 screws. Refer also to the dimension diagram where the drilling holes are illustrated. Mount the device so that the control panel can be read during operation and the mains connection is (L1/+, L2/–) positioned at the top. Img.

  • Page 18: Connection

    Connection Connection Connection requirements DANGER Risk of fatal injury due to electric shock! Touching live parts of the system carries the risk of: • Risk of electrocution due to electric shock • Damage to the electrical installation • Destruction of the device Before installing the device and before working on its connections, make sure that the installation has been de-energised.

  • Page 19: Connection Diagram

    ISOMETER® isoPV1685DP Connection diagram [L1/+, L2/−]: Connection to a 3(N)AC system [L1/+, L2/−]: Connection to a AC system [L1/+, L2/−]: Connection to a DC system [I1+, I1−, I2+, I2−]: Digital inputs [A, B, S]: RS-485 interface [E, KE]: Connection to earth und controlearth [A1, A2]: Connection to supply voltage [31, 32, 33] [21, 22, 24] [11, 12, 14]: Connection to the relays K3...K1 isoPV1685DP_D00479_02_M_XXEN/02.2025...
  • Page 20 Connection Step-by-step connection of the ISOMETER ® Connect the device according to the wiring diagram. Proceed as follows: Connect terminals E and KE to earth (PE). Connect terminals A and B to the BMS bus. Connect terminal S to the bus conductor shield (only at one end of the conductor). Connect terminals I1+, I1–...
  • Page 21 ISOMETER® isoPV1685DP Connection option with insulation fault locator EDS440 to a 3NAC system The connection to the 3NAC network shown here serves as an example to illustrate the EDS components. Connection to 3AC, AC and DC networks is as shown in the connection diagram. isoPV1685DP_D00479_02_M_XXEN/02.2025...

  • Page 22: Commissionig

    Commissionig Commissionig Commissioning diagram isoPV1685DP_D00479_02_M_XXEN/02.2025...

  • Page 23: Comissioning With Insulation Fault Monitoring

    ISOMETER® isoPV1685DP Comissioning with insulation fault monitoring isoPV1685DP_D00479_02_M_XXEN/02.2025...

  • Page 24: Initial Commissioning

    Commissionig Initial commissioning Follow the instructions of the commissioning wizard on the display. Setting the language The language selected here will be used in the menu and for device messages. Language English Francais Setting date and time Alarm messages in the history memory and the insulation resistance value over time can only be assigned correctly to the isoGraph when date and time are set correctly.
  • Page 25 ISOMETER® isoPV1685DP Setting response values Set the prewarning response value. Commissioning Alarm 1 Please set the response value R(an1) for Alarm 1. Set the alarm response value. Commisioning Alarm 2 Please set the response value R(an2) for Alarm 2 Setting the EDS mode Set the mode for the insulation fault location to manual, automatic or 1 cycle.
  • Page 26 Commissionig TEST Start the device test. TEST Start test? Relays can switch. Cancel TEST During the test, all relays switch and the ALARM 1 and ALARM 2 LEDs light up briefly. isoPV1685DP_D00479_02_M_XXEN/02.2025...

  • Page 27: Display

    ISOMETER® isoPV1685DP Display Standard display During normal operation, the ISOMETER® displays the message OK and below, the currently measured insulation resistance. The signal quality of the measurement is suitable for the selected profile The better the signal quality, the faster and more exact the device can measure. The signal quality of the measurement is not suitable for the selected profile Select a different measurement profile.

  • Page 28: Fault Display (Inactive)

    Display Keypad Insulation fault Previous fault Menu selection 7 kΩ Acknowledge fault Start test Next fault Device information Display 1 / 4 Display of fault value and DC shift Signal quality and progress bar xth fault of Fault display (inactive) An inactive fault is displayed by an encircled i.

  • Page 29: Acknowledging A Fault Message

    ISOMETER® isoPV1685DP Acknowledging a fault message In order to acknowledge the fault message and return to the ISOMETER®'s standard display, all faults must be acknowledged by means of the RESET button. This means that fault messages can only be reset when the cause of fault has been eliminated. Press the RESET button, then ˃...

  • Page 30: Insulation Fault Location

    Display Keypad Data isoGraph Switch to previous measured value overview ,100 Exit view ,010 Change scaling (zoom in) ,001 Change scaling (zoom out) MΩ Switch to next measured value overview hour 16:26 16:52 Display 1 / 4 Present time scaling xth view of ...
  • Page 31 ISOMETER® isoPV1685DP When an insulation fault is detected, the display switches to fault mode. When a fault is active, the header is highlighted in orange; the number of faults present and the ongoing insulation fault location are displayed. Keypad IT system Previous fault Menu selection Start Test...

  • Page 32: Settings

    Settings Settings Operating and navigating Menu selection Activate the menu by pressing the MENU button. IT system 230 kΩ R(an) 40kΩ/10kΩ Selection of submenus Use the and buttons ˄ and ˅ to select the options. Press the button ˃ or OK to jump to the next submenu Menu name x.y.z for the selected options.

  • Page 33: Character Input

    ISOMETER® isoPV1685DP Character input Use the buttons ˂ and ˃ to to select a character Input text x.y.z position on the display. Change a character with the buttons ˄ and ˅. To delete a character, use the ˂ and ˃ buttons to select the position and then select del using the ˅...

  • Page 34: Menu Overview Isopv1685Dp

    Settings Menu overview isoPV1685DP Alarm settings Insulation alarm Profile Device Coupling monitoring Power frequency Inputs Digital 1 Digital 2 see Digital 1 Outputs Relay 1 Relay 2 see Relay 1 Buzzer General Mode Current Scan for channels Enable channels Group settings Channel selection Outputs Digital input...
  • Page 35 ISOMETER® isoPV1685DP Data meas. values Control Test Reset History (nur "Löschen" geschützt) History Delete Devive settings Language Clock Interface Display Password Commissioning Factory settings Service Info isoPV1685DP_D00479_02_M_XXEN/02.2025...

  • Page 36: Settings In The Device Menu

    Settings Settings in the device menu 8.3.1 Alarm settings The limit values for the insulation resistances of Alarm 1 and Alarm 2 can be specified in the Alarm settings menu and can be adapted to the user profile of the ISOMETER®. A device password is required for entering the settings.

  • Page 37: Power Frequency

    ISOMETER® isoPV1685DP 8.3.1.3 Device Switch the measurement of the insulation resistance of the ISOMETER® active or inactive: Active The device is active. Inactive The device does not measure the insulation resistance and is disconnected from the monitoring system (system disconnection). The IT system is not monitored! The message Device inactive appears on the display The LEDs ALARM1 and ALARM2 light up.

  • Page 38: Operating Mode

    Settings t(on) The response time t(on) after a switch-on signal can be set between 100 milliseconds and 5 minutes. t(off) The response time t(off) after a switch-off signal can be set between 100 milliseconds and 5 minutes. Funktion The functions of the digital inputs of the ISOMETER®s: Digital input without function TEST Device self test...

  • Page 39: Eds (Insulation Fault Location)

    ISOMETER® isoPV1685DP • N/C N/C operation of the contacts 11-12-14 / 21-22-24 (in fault-free condition, the alarm relay is energised). • N/O N/O operation of the contacts 11-12-14 / 21-22-24 (in fault-free condition, the alarm relay is de-energised). Relay 3 Relay 3 does not appear in the device menu.

  • Page 40: Scan For Channels

    Settings 1 cycle In 1-cycle mode, the insulation fault location starts automatically as soon as the response value of alarm 2 of the ISOMETER® has fallen below the preset value. The insulation fault location is stopped after one cycle. If the insulation fault still exists after the interruption, the insulation fault location does NOT start again.

  • Page 41: Group Settings

    ISOMETER® isoPV1685DP 8.3.2.3 Enable channels During initial commissioning all channels are disabled. Before configuring the channels, they must be enabled in this menu. Select which measuring channels you would like to enable. Multiple selection is possible. Select all All channels are selected. No selection No channel is selected.
  • Page 42 Settings • Current transformers (CT) Set the used transformer. TYPE A W… / WR… / WS… TYPE A W…AB • CT monitoring Enable or disable the CT monitoring. If CT monitoring is enabled, an alarm is signalled as soon as a fault occurs on a current transformer of an activated channel (short circuit or interruption).
  • Page 43 ISOMETER® isoPV1685DP The relay operating mode can be adapted to the application. Normally closed: In fault-free condition, the alarm relay is energised. Normally opened:In fault-free condition, the alarm relay is de-energised. • Functions 1…3 Up to three functions can be assigned to one output.
  • Page 44 Settings • Functions 1...3 Up to three functions can be assigned to one output. The functions are linked via an OR operator: The function is not used. Output status changes if an insulation fault is detected on one of the measuring channels.

  • Page 45: Common Alarm

    ISOMETER® isoPV1685DP Connection fault Output status changes when one of the following measuring current transformer connection faults occurs: • Measuring current transformers defective • Power supply cable interrupted • Power supply cable short-circuited Insulation fault The buzzer signals active insulation fault location. location active Common alarm The status of the output changes on the occurrence of any alarms and fault messages...

  • Page 46: Digital Input

    Settings BS bus malfunction Message in case of a faulty BS bus connection • No master available • A/B interchanged • A/B short-circuited • A/B separated 8.3.2.4.3 (Digital) Input Select the digital inputs of the EDS that you would like to configure: Select all All digital inputs are selected.

  • Page 47: Channel Configuration

    ISOMETER® isoPV1685DP 400 Hz • Trigger The locating current pulse of the ISOMETER® is synchronised with the measurement technology in the EDS via the BB bus or the BS bus. This allows a more reliable detection of the locating current pulse in the event of disturbances.
  • Page 48 Settings 8.3.2.6 (Digital) Input Select the digital inputs of the EDS that you would like to configure: Select all All digital inputs are selected. No selection No digital input is selected. Invert selection The current selection is inverted. Digital input is selected. Dig.
  • Page 49 ISOMETER® isoPV1685DP • TEST Activating or deactivating the manual function test of the relay. The manual test checks the switching function of the relay. The manual test does not check the switching function of the relay. • Relay mode The relay operating mode can be adapted to the application. Normally closed: In fault-free condition, the alarm relay is energised.
  • Page 50 Settings The relay operating mode can be adapted to the application. Normally closed - N/C operation, contacts 11-12-14 / 21-22-24 In fault-free condition, the alarm relay is energised. Normally opened - N/O operation, contacts 11-12-14 / 21-22-24 In fault-free condition, the alarm relay is de-energised. •...
  • Page 51 ISOMETER® isoPV1685DP Output status changes if the residual current is exceeded. (RCM function) Device error Output status changes in the event of an internal device error. Connection fault Output status changes when one of the following measuring current transformer connection faults occurs: •...

  • Page 52: Data Measured Values

    The EDS exits the alarm mode as soon as the cause of a fault is eliminated. 8.3.2.9 Service The service menu can only be accessed by Bender Service staff with a service password. 8.3.3 Data measured values The ISOMETER® stores certain measured values for a specific period of time. These data can be viewed at the "Data meas.

  • Page 53: History

    ISOMETER® isoPV1685DP 8.3.5 History In the history menu, the faults detected by the ISOMETER® are displayed. For a detailed description refer to “History memory”, Page 29. • History Overview of faults that have occurred • Delete Resets the history memory 8.3.6 Device settings Here you can make the basic settings of the ISOMETER®.
  • Page 54 Settings 8.3.6.3 Interface Set the parameters for connecting additional devices to the ISOMETER® in the menu Interface. • Mode • BMS • Modbus/RTU Mode Settings for communication with other devices via the BMS bus or Modbus/RTU • BMS • Modbus/RTU BMS adress Address setting of the BMS bus from 1 to 90.
  • Page 55 Factory settings Resetting the device to factory settings. 8.3.6.8 Service The service menu is accessible only by Bender Service. 8.3.6.9 Info The ISOMETER®'s present settings can be viewed in the Info menu. Navigate through the different views using the ˄ and ˅ buttons: •...

  • Page 56: Device Communication

    Device communication Device communication RS-485 interface The RS-485 interface, galvanically isolated from the device electronics, serves as a physical transmission medium for the BMS protocol. When an ISOMETER® or other bus-capable devices are interconnected via the BMS bus in a network, the BMS bus must be terminated at both ends with a 120 resistor.
  • Page 57 Shielded cable, core diameter 0.8 mm (e.g. J-Y(St)Y 2x0.8), shield connected to earth (PE) on one end. The max number of bus nodes is restricted to 32 devices. If more devices are to be connected, Bender recommends the use of a DI1 repeater.

  • Page 58: Bms Protocol

    Device communication BMS protocol BMS protocol This protocol is an essential part of the Bender measuring device interface (BMS bus protocol). Data transmission generally makes use of ASCII characters. Interface data are: • Baud rate: 9600 baud • Transmission: 1 start bit, 7 data bits, 1 parity bit, 1 stop bit (1, 7, E, 1) •...

  • Page 59: Messages Via The Bms Bus

    ISOMETER® isoPV1685DP Before the ISOMETER® takes over the backup master function after being switched on, it waits to see if another master connects to the system. Waiting period: BMS address minus 1 = waiting period in minutes. Example: Time the ISOMETER® with BMS address 3 waits for a master to connect: 3 min − 1 min = 2 min Set the BMS address in the device menu via the following path: MENU: Device settings >...

  • Page 60: Error Codes

    Device communication Alarm Channel Meaning Overtemperature PGH Overtemperature of the PGH Operating messages Alarm Channel Meaning Insulation resistance Current insulation resistance R (if R > (R + Hysteresis)) Insulation resistance Current insulation resistance R (if R > (R + Hysteresis)) Leakage capacitance Leakage capacitance C in nF, F...

  • Page 61: Resetting Error Messages

    The error can also be reset by means of the acknowledgement command via the BMS bus. Firmware update via BMS bus The firmware is updated via the BMS bus with the 'BMS Update Manager', which is available from Bender. isoPV1685DP_D00479_02_M_XXEN/02.2025...

  • Page 62: Modbus Rtu Protocol

    Modbus RTU protocol Modbus is an internationally used protocol for data exchange between devices. The Modbus RTU protocol is used by Bender devices for connection in systems with Condition Monitor (e.g. COM465xP) or for connection to third-party systems The protocol transmits measured values, status messages, control commands or unit parameters in binary form.

  • Page 63: Technical Data

    ISOMETER® isoPV1685DP Technical data 10.1 Device profiles The adaptation to different applications is achieved by selecting a device profile. The following device profiles are available. PV up to 500 F Profile for PV systems with a leakage capacitance of up to 500 F. Suitable for both central inverter and string inverter applications.
  • Page 64 Technical data PV up to 4000 F Profile for PV systems with a leakage capacitance of up to 4000 F. Suitable for both central inverter and string inverter applications. Settings profile 'PV up to 4000 F' Response values DC, 50 Hz, 60 Hz 0…4000 F ±...

  • Page 65: Factory Settings

    ISOMETER® isoPV1685DP Leakage capacitance diagram The determination of the leakage capacitance depends on the size of the insulation resistance. The following diagrams show the relationship Example: Insulation resistance 50 kOhm => min. measurable leakage capacitance 35 F Insulation resistance 5 kOhm => min. measurable leakage capacitance 210 F 10.2 Factory settings Parameter...

  • Page 66: Tabular Data

    Technical data 10.3 Tabular data Insulation coordination acc. to IEC 60664-1/IEC 60664-3 Definitions Measuring circuit (IC1) (L1/+, L2/-), (E, KE) Supply circuit (IC2) A1, A2 Output circuit 1 (IC3) 11, 12, 14 Output circuit 2 (IC4) 21, 22, 24 Output circuit 3 (IC5) 31, 32, 34 Control circuit (IC6) (A, B), (I1+, I1-, I2+, I2-)

  • Page 67: Supply Voltage

    ISOMETER® isoPV1685DP Safe isolation (reinforced insulation) between IC1 / (IC2-5) OVC III, 1500 V IC2 / (IC3-5) OVC III, 300 V IC2 / IC1+IC6 OVC III, 50 V IC3 / (IC4-6) OVC III, 300 V IC4 / (IC5-6) OVC III, 300 V IC5 / IC6 OVC III, 300 V Voltage test (routine test) acc.
  • Page 68 Technical data Response values for insulation monitoring Response values R 200 …200 k Condition for response values R and R ≥ R Upper limit of the measuring range for setting C = 500 F 200 k emax 50 k Upper limit of the measuring range for setting C = 4000 F emax Relative uncertainty (acc.

  • Page 69: Serial Interface

    ISOMETER® isoPV1685DP Serial interface Interface RS-485 Protocols BMS; Modbus RTU Connection Terminals A/B Shield: terminal S Cable length ≤ 1200 m Shielded cable (shield to functional earth on one end) 2-core, ≥ 0.6 mm2, z. B. J-Y(St)Y 2x0.6 Terminating resistor, can be connected (Term. RS-485) 120 (0.5 W) Device address, BMS bus 2…90...

  • Page 70: Mains Connection

    Technical data Mains connection Connection type pluggable push-wire terminals Connection, rigid/flexible 0.2…10 mm /0.2…6 mm Connection, flexible with ferrule, without/with plastic sleeve 0.25…6 mm /0.25…4 mm Conductor sizes (AWG) 24…8 Stripping length 15 mm Opening force 90…120 N Environment / EMC IEC 61326-2-4 Rel.
  • Page 71 ISOMETER® isoPV1685DP Other Operating mode continuous operation Position of normal use vertical, mains connection on top Tightening torque for enclosure mounting (4x M5) 1.0…1.5 Nm Degree of protection, internal components IP30 Degree of protection, terminals IP30 Enclosure material polycarbonate Flammability class Software version Weight ≤1600 g...

  • Page 72: Standards And Approvals

    Technical data 10.4 Standards and approvals The ISOMETER® isoPV1685DP was developed in compliance with the following standards: • DIN EN 60664-1 (VDE 0110-1) • DIN EN 61557-8 (VDE 0413-8) • IEC 61326-2-4 • IEC 61557-8 • IEC 61557-8 Appendix C •...
  • Page 73 ISOMETER® isoPV1685DP isoPV1685DP_D00479_02_M_XXEN/02.2025...
  • Page 74 Technical data isoPV1685DP_D00479_02_M_XXEN/02.2025...
  • Page 75 ISOMETER® isoPV1685DP isoPV1685DP_D00479_02_M_XXEN/02.2025...
  • Page 76 Alle Rechte vorbehalten. 35305 Grünberg Nachdruck und Vervielfältigung nur mit Germany Genehmigung des Herausgebers. © Bender GmbH & Co. KG, Germany Subject to change! The specified Tel.: +49 6401 807-0 All rights reserved. standards take into account the edition info@bender.de Reprinting and duplicating only with valid until 02.2025 unless otherwise...

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