Bender ISOMETER isoUG425 Operating Manual
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Bender ISOMETER isoUG425 Operating Manual

Bender ISOMETER isoUG425 Operating Manual

Insulation monitoring device for earth fault detection in unearthed dc systems it systems up to 120 v, software version: d0476 v2.xx
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Manual
ISOMETER® isoUG425
Insulation monitoring device for
earth fault detection in unearthed
DC systems (IT systems) up to 120 V
Software version: D0476 V2.xx
isoUG425_D00220_02_M_XXEN/05.2018

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Summary of Contents for Bender ISOMETER isoUG425

  • Page 1 Manual ISOMETER® isoUG425 Insulation monitoring device for earth fault detection in unearthed DC systems (IT systems) up to 120 V Software version: D0476 V2.xx isoUG425_D00220_02_M_XXEN/05.2018...
  • Page 2 E-Mail: info@bender.de Web: www.bender.de Customer service Service hotline: 0700-BenderHelp (Telephone and Fax) Carl-Benz-Straße 8 • 35305 Grünberg • Germany © Bender GmbH & Co. KG Tel.:+49 6401 807-760 All rights reserved. Fax:+49 6401 807-629 Reprinting only with permission of the publisher.

  • Page 3: Table Of Contents

    Table of contents 1. Important information ..............5 3.2.11 Fault memory ..........10 3.2.12 History memory HiS .
  • Page 4 Table of contents 7. Data access using the Modbus RTU protocol ......20 7.1 Reading out the Modbus register from the ISOMETER®....20 7.1.1 Command of the master to the ISOMETER® ..... 20 7.1.2 The ISOMETER®...

  • Page 5: Important Information

    This signal word indicates a low-level risk that can result in minor or moderate injury or damage to property if not avoided. • Extended guarantee for Bender devices, which includes an in-house repair service or CAUTION replacement devices at no extra cost...

  • Page 6: Field Service

    Electronic Manufacturer's Association) also applies. • Batteries and accumulators are not part of household waste and must be disposed Sale and delivery conditions can be obtained from Bender in printed or electronic format. of in accordance with the regulations. 1.5 Inspection, transport and storage •...

  • Page 7: Safety Instructions

    The ISOMETER® monitors the asymmetrical insulation resistance R of unearthed DC sys- instructions for Bender products". tems (IT systems) with nominal system voltages of DC 12 … 120 V. Put another way, it is an insulation monitoring device for earth fault detection in unearthed DC systems (IT sys- 2.2 Work activities on electrical installations...

  • Page 8: Function

    The maximum und- • RS-485 interface (galvanically isolated) with the following protocols: ervoltage value is limited by the overvoltage value. BMS interface (Bender measuring device interface) for data exchange with other • Bender components The DC value of the system voltage is monitored. If the nominal system voltage U reach- es, falls below or exceeds the limit values ("U <"...

  • Page 9: Malfunction

    The connections " " " " to earth are interrupted. please contact Bender Service. E.01 Action: 3.2.5 Signalling assignment of the alarm relays K1/K2 Check connection, eliminate fault. The error code will be erased auto- The messages "device error", "insulation fault", "insulation impedance fault", "undervolt- matically once the fault has been eliminated.

  • Page 10: Password Protection (On, Off)

    Function Function Response delay 3.2.10 External, combined test or reset button T/R The response delay t can be set uniformly for all messages in the "t" menu using the pa- Reset= Press the external button < 1.5 s rameter "ton", whereby each alarm message specified in the alarm assignment has its Test= Press the external button >...

  • Page 11: Interface/Protocols

    The ISOMETER® uses the serial hardware interface RS-485 with the following protocols: • BMS The BMS protocol is an essential component of the Bender measuring device inter- face (BMS bus protocol). Data transmission generally makes use of ASCII characters. • Modbus RTU...

  • Page 12: Installation, Connection And Commissioning

    4. Installation, connection and commissioning Installation, connection and commissioning and the push-wire terminal connection are shown below: Risk of electric shock! Touching uninsulated live conductors can result in death or serious injury. Therefore avoid any physical contact with active conductors and ensure DANGER compliance with the regulations for working on electrical installations.
  • Page 13 Installation, connection and commissioning Installation, connection and commissioning Connect the device as illustrated in the wiring diagram: The supply voltage U applied to A1/A2 can be provided by the system voltage (L +/L-) when the system voltage is ≥ 24V DC. Otherwise a separate power supply is needed.

  • Page 14: Commissioning

    Installation, connection and commissioning Installation, connection and commissioning For details about the conductor cross sections required for wiring, refer to the technical 4.3 Commissioning data from Page 28. Wiring diagram legend: 1. Check that the ISOMETER® is properly connected to the system to be monitored. Terminal Connectors 2.

  • Page 15: Operation Of The Device

    5. Operation of the device Operation of the device The menu structure is illustrated schematically on the following pages. 5.1 Display elements in use After pressing the "MENU" button for > 1.5 s, the first menu item "AL" appears. Use (Enter) buttons for navigation and settings.

  • Page 16: Menu Structure

    Operation of the device Operation of the device 5.2 Menu structure 5.3 "AL" menu Measurement display 5.3.1 Response value setting Standard display Menu selection The two parameters that monitor the insulation resistance, "R1" and "R2", can be found in Menu the response value menu "AL".

  • Page 17: Out" Menu

    Operation of the device Operation of the device 5.4 "out" menu K1 "r1" K2 "r2" LEDs Alarm description 5.4.1 Configuration of the relay operating mode Display Display Manually    started Relay K1 Relay K2 Description test test device test Display Display Device start with...

  • Page 18: T" Menu

    The measured value is indicated in the history memory. Maximum permissible leakage 1 . . . 50 μF capacitance C S.Ct Device test during device start Restore factory settings For Bender Service only FAC = Factory setting; Cs = Customer settings isoUG425_D00220_02_M_XXEN/05.2018...

  • Page 19: Data Access Using The Bms Protocol

    6. Data access using the BMS protocol Data access using the BMS protocol The BMS protocol is an essential component of the Bender measuring device interface (BMS bus protocol). ASCII characters are used for data transfer. BMS channel no. Operation value...

  • Page 20: Data Access Using The Modbus Rtu Protocol

    7. Data access using the Modbus RTU protocol Data access using the Modbus RTU protocol Requests to the ISOMETER® can be made using the function code 0x03 (read multiple reg- 7.2 Writing the Modbus register (parameter setting) isters) or the command 0x10 (write multiple registers). The ISOMETER® generates a func- Registers in the device can be modified with the Modbus command 0x10 (set multiple tion-related answer and sends it back.

  • Page 21: Exception Code

    Data access using the Modbus RTU protocol Data access using the Modbus RTU protocol 7.3 Exception code If a request cannot be answered for whatever reason, the ISOMETER® will send a so-called exception code with which possible faults can be narrowed down. Exception code Description 0x01...

  • Page 22: Modbus Register Assignment Of The Isometer

    8. Modbus register assignment of the ISOMETER® Modbus register assignment of the ISOMETER® Depending on the device condition, the information in the registers is the measured val- ue without alarm; the measured value with alarm 1; the measured value with alarm 2; or Measured value Register Device fault...
  • Page 23 Modbus register assignment of the ISOMETER® Modbus register assignment of the ISOMETER® Register Property Description Format Unit Value range Register Property Description Format Unit Value range Memory function for 0 = Inactive 3012 alarm messages UINT 16 Maximum permissi- 1 = Active (Fault memory) "M"...

  • Page 24: Device-Specific Data Type Of The Isometer

    Modbus register assignment of the ISOMETER® Modbus register assignment of the ISOMETER® 8.1 Device-specific data type of the ISOMETER® 8.1.2.2 AT&T = Alarm type and test type (internal/external) Meaning 8.1.1 Device name The data format of the device name is specified below. Word 0x01 0x02...

  • Page 25: R&U = Range And Unit

    Modbus register assignment of the ISOMETER® Modbus register assignment of the ISOMETER® 8.1.2.3 R&U = Range and unit A set bit activates the specified function. Meaning Display Meaning Invalid (init) indication No unit When reading, always 0 Ω Reserved When writing, any value x Err Device error E.xx Pre-alarm R1 - fault R...

  • Page 26: Channel Descriptions

    Modbus register assignment of the ISOMETER® Modbus register assignment of the ISOMETER® 8.2 Channel descriptions To convert parameter data, data type descriptions are required. Text representation is not necessary in this case. Measured value description/ Value Description of parameters Value alarm message operating Note message...

  • Page 27: Isodata Data String

    9. IsoData data string IsoData data string In IsoData mode, the ISOMETER® continuously sends the whole data string with a cycle time of approximately 1 second. Communication with the ISOMETER® in this mode is not possible and no additional sender may be connected via the RS-485 bus cable. IsoData is activated in the menu item "Adr"...

  • Page 28: Technical Data

    10. Technical data Technical data 10.1 Tabular representation Response values Response value ..........................2…100 kΩ (50 kΩ)* ( )* = Factory setting Response value ..........................1…95 kΩ (25 kΩ)* Relative uncertainty ........................±15 %, at least ±2 kΩ Insulation coordination acc. to IEC 60664-1/IEC 60664-3 Hysteresis ............................

  • Page 29: Standards, Approvals And Certifications

    Technical data Technical data Minimum contact rating ........................1 mA at AC/DC ≥ 10 V 10.2 Standards, approvals and certifications Environment/EMC The ISOMETER® has been developed in compliance with the following standards: EMC..................................IEC 61326-2-4 • DIN EN 50155 Ambient temperatures: Subject to change! The specified standards take into account the edition valid until Operation .................................

  • Page 30: Index

    INDEX BMS 11 Installation and connection 12 Interface/protocols 11 IsoData 11 Commissioning 14, 19 Data string 27 Configuration 17 Fault memory 17 Function 18 Malfunction 9 Interfaces 17 Measuring times 9 Relay operating mode 17 Menu Time 18 "AL" 16 Connection 12 "out"...
  • Page 31 Relay alarm assignment 17 Reset button T/R 10 Response delay time 10 Response times 9 Response value setting 16 Safety instructions 7 Selecting menu items 17 Self test 8 Automatic 9 Manual 9 Setting time delays 18 Signalling assignment of the alarm relays K1/K2 9 Start-up delay t 10 Technical data 28 Total response time 9...
  • Page 32 Bender GmbH & Co. KG Customer service Postbox 1161 • 35301 Grünberg • Germany Service hotline: 0700-BenderHelp (Telephone and Fax) Londorfer Straße 65 • 35305 Grünberg • Germany Carl-Benz-Straße 8 • 35305 Grünberg • Germany Tel.: +49 6401 807-0 Tel.:...

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