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I prodotti Bender sono rinomati e utilizzati in tutto il mondo da oltre 65 anni.

Offriamo la massima qualità e sicurezza unite a un servizio globale di assistenza e tutto il supporto che vi serve per la risoluzione dei vostri problemi di monitoraggio.


ISOMETER® iso685-…-B

  • Predefined measurement profiles
  • Reliable measurement of insulation resistance, voltage, capacitance and frequency
  • Integrated web server
  • Modbus TCP/RTU
  • Can be used in coupled IT systems

The ISOMETER® is an insulation monitoring devices in accordance with IEC 61557-8 for IT systems. The devices are universally applicable in AC, 3(N)AC, AC/DC and DC systems. AC systems may include extensive DC-supplied loads (such as rectifiers, inverters, variable-speed drives).

Device variants
iso685-D: This device variant ISOMETER® iso685-D features a high-resolution graphic LC display and operating controls for direct operation of the device functions. It cannot be combined with an FP200.
iso685-S: This device variant ISOMETER® iso685-S features neither a display nor operating controls. It can only be used in combination with the FP200 and it is operated via this front panel.
Option "W": The ISOMETER®s with and without integrated display are available with option „W“ for extreme climatic and mechanical conditions (ISOMETER® iso685W-D and iso685W-S).


  • ISOMETER® for IT AC systems with galvanically connected rectifiers or inverters and for IT DC systems (IT = unearthed systems)
  • Automatic adaptation to the existing system leakage capacitance
  • Combination of AMPPlus and other profilespecific measurement methods
  • Two separately adjustable response value ranges of 1 kΩ…10 MΩ
  • High-resolution graphic LC display for excellent readability and recording of the device status
  • Connection monitoring (monitoring of the measuring lines)
  • Automatic device self test
  • Graphical representation of the insulation resistance over time (isoGraph)
  • History memory with real-time clock (buffer for three days) for storing 1023 alarm messages with date and time
  • Current or voltage output 0(4)…20 mA, 0…400 μA, 0…10 V, 2…10 V (galvanically separated), which is analogous to the measured insulation value of the system
  • Freely programmable digital inputs and outputs
  • Remote setting via the Internet or Intranet (Webserver/Option: COMTRAXX® Gateway).
  • Worldwide remote diagnosis via the Internet
  • RS-485/BS (Bender sensor bus) for communication with other Bender devices
  • ISOnet: Internal separation of the ISOMETER® from the IT system to be monitored (e.g. if several IT systems are interconnected)
  • BCOM, Modbus TCP/RTU and web server
  • Voltage expandable via coupling devices


  • AC, DC or AC/DC main circuits
  • AC/DC main circuits with directly connected DC components, such as rectifiers, converters, variable-speed drives
  • UPS systems, battery systems
  • Heaters with phase control
  • Systems including switch-mode power supplies
  • coupled IT systems with high leakage capacitances

ISOMETER® iso685-…-B Variante/i

TypeNominal system voltage range UnSupply voltage USDisplayOption WArt. No.
iso685-D-BAC 0…690 V; 1…460 Hz /
DC 0…1000 V
AC 24…240 V; 50…400 Hz /
DC 24…240 V
iso685W-D-BAC 0…690 V; 1…460 Hz /
DC 0…1000 V
AC 24…240 V; 50…400 Hz /
DC 24…240 V
3K23, 3M12
iso685-S-B + FP200AC 0…690 V; 1…460 Hz /
DC 0…1000 V
AC 24…240 V; 50…400 Hz /
DC 24…240 V
iso685W-S-B + FP200AC 0…690 V; 1…460 Hz /
DC 0…1000 V
AC 24…240 V; 50…400 Hz /
DC 24…240 V
3K23, 3M12

Accessori opzionali per ISOMETER® iso685-…-B

Type designationTypeArt. No.
Coupling devicesAGH150W-4

Possible measuring instruments on request!

Type designationArt. No.
A set of screw terminals*B91067901
A set of push-wire terminalsB91067902
Enclosure accessories (terminal cover, 2 mounting clips)*B91067903
Transparent cover 144x72 (IP65) for FP200 **B98060005

* included in the scope of delivery
** If the “transparent front cover 144x72 (IP65)” is used, the cutout in the control cabinet must be increased in height from 66 mm to 68 mm (+ 0.7/-0 mm).

Download per ISOMETER® iso685-…-B

Certificatos TÜV NORD - isox685x and FP200x 443.4 KB EN2023/01/12 14:43:3712.01.2023 14:43:37
Certificatos TÜV NORD - isox685x und FP200x 449.0 KB DE2023/01/12 14:43:2912.01.2023 14:43:29
Dichiarazioni di conformità CE iso685 92.3 KB 2022/08/12 06:17:2512.08.2022 06:17:25
Dichiarazioni di conformità CE FP200 82.4 KB 2022/08/12 06:17:2412.08.2022 06:17:24
Data sheet FP200 2.2 MB ZH2019/05/13 10:31:3313.05.2019 10:31:33D00179
Data sheet FP200 379.6 KB ES2019/05/13 10:31:3713.05.2019 10:31:37D00179
Data sheet FP200 420.1 KB EN2019/05/13 10:31:3513.05.2019 10:31:35D00179
Data sheet FP200 421.3 KB DE2019/05/13 10:31:3413.05.2019 10:31:34D00179
Depliant prodotto iso685 1.8 MB DE2019/05/13 10:30:5713.05.2019 10:30:57D00022
Depliant prodotto iso685 1.8 MB EN2019/05/13 10:31:0113.05.2019 10:31:01D00022
Quickstarts iso685-… 2.5 MB DE2021/03/02 13:36:1902.03.2021 13:36:19D00022
Quickstarts iso685-… 830.9 KB ZH2019/05/13 10:31:5713.05.2019 10:31:57D00022
Quickstarts iso685-… 2.5 MB EN2021/03/02 13:36:1902.03.2021 13:36:19D00022
Quickstarts iso685-… 2.5 MB ES2021/03/02 13:36:1902.03.2021 13:36:19D00022
Quickstarts iso685-… 2.5 MB FR2021/03/02 13:36:1902.03.2021 13:36:19D00022
Manuali di istruzioni iso685-x-B 12.3 MB DE2022/06/09 10:46:3609.06.2022 10:46:36D00177
Manuali di istruzioni iso685-x-B 12.1 MB EN2022/10/26 05:04:4726.10.2022 05:04:47D00177
Manuali di istruzioni iso685-… Modbus-Einstellungen 909.7 KB DE2021/12/21 14:12:5221.12.2021 14:12:52D00022
Manuali di istruzioni iso685-… Modbus settings 844.0 KB EN2021/08/25 07:16:4225.08.2021 07:16:42D00022
Data sheet iso685-x-B 1.8 MB DE2021/07/13 13:07:1413.07.2021 13:07:14D00177
Data sheet iso685-x-B 1.8 MB EN2021/07/13 13:07:3413.07.2021 13:07:34D00177
Data sheet iso685-x-B 1.8 MB ES2021/07/13 13:07:5213.07.2021 13:07:52D00177
Depliant prodotto iso685 1.8 MB ES2019/05/13 10:31:2313.05.2019 10:31:23D00022
Manuali di istruzioni iso685-… Webserver 547.9 KB DE2019/05/13 10:31:4613.05.2019 10:31:46D00022
Manuali di istruzioni iso685-… web server 560.5 KB EN2019/05/13 10:31:5313.05.2019 10:31:53D00022
Manuali di istruzioni iso685-x-B 12.3 MB ZH2021/07/13 13:11:0813.07.2021 13:11:08D00177
Manuali di istruzioni iso685-… Modbus 设置 907.0 KB ZH2021/12/23 06:35:5323.12.2021 06:35:53D00022
Data sheet iso685-x-B 1.8 MB FR2021/07/13 09:25:3113.07.2021 09:25:31D00177
Manuali di istruzioni Inbetriebnahme eines iso685-S…-Gerätes ohne angeschlossenes Display FP200(W) 1.4 MB DE2021/06/10 12:48:1210.06.2021 12:48:12D00022
Manuali di istruzioni Commissioning iso685-S… devices without a connected Display FP200(W) 1.4 MB EN2021/06/10 12:48:1210.06.2021 12:48:12D00022
Software iso685(W)-S/D-B Update V1.29 6.3 MB 2021/11/17 05:59:0417.11.2021 05:59:04
Quickstarts FP200 3.2 MB DE2021/06/28 04:56:3228.06.2021 04:56:32D00179
Quickstarts FP200 3.2 MB EN2021/06/28 04:56:3228.06.2021 04:56:32D00179
Quickstarts FP200 3.2 MB FR2021/06/28 04:56:3228.06.2021 04:56:32D00179
Quickstarts FP200 3.2 MB ES2021/06/28 04:56:3228.06.2021 04:56:32D00179
Quickstarts FP200 2.5 MB ZH2021/06/28 04:56:0528.06.2021 04:56:05D00179
Depliant prodotto Mining 11.7 MB ES2020/05/22 14:37:3122.05.2020 14:37:31