ISOMETER® iso175
The ISOMETER® iso175 insulation monitoring device is suitable for ungrounded drive systems in hybrid, fuel cell, and electric vehicles.
The device reliably detects insulation faults, thereby contributing significantly to electrical safety and the availability of the electrical system. A key factor in its success is the use of an active, patented measurement method that allows insulation measurements to be performed even on a de-energized high-voltage system before the energy storage system is activated.
Thanks to the integrated grounding switch, no additional relays or contactors are required. Furthermore, the ISOMETER® iso175 ensures reliable insulation measurements even with high network leakage capacitances of up to 10 μF. The insulation monitoring device can be easily integrated into modern systems thanks to its built-in CAN interface. Additional information is available to support and simplify system analysis.
The ISOMETER® iso175 insulation monitoring device is suitable for ungrounded drive systems in hybrid, fuel cell, and electric vehicles.
The device reliably detects insulation faults, thereby contributing significantly to electrical safety and the availability of the electrical system. A key factor in its success is the use of an active, patented measurement method that allows insulation measurements to be performed even on a de-energized high-voltage system before the energy storage system is activated.
Thanks to the integrated grounding switch, no additional relays or contactors are required. Furthermore, the ISOMETER® iso175 ensures reliable insulation measurements even with high network leakage capacitances of up to 10 μF. The insulation monitoring device can be easily integrated into modern systems thanks to its built-in CAN interface. Additional information is available to support and simplify system analysis.
Features
- Insulation measurement prior to energizing the high-voltage system to ensure safe vehicle startup
- Reliable insulation measurement for mains leakage capacitances up to 10 µF
- Selectable measurement profiles to adapt measurement behavior to different vehicle architectures and operating conditions
- Insulation monitoring on the AC side of ePTO and comparable applications up to 480 V AC (as of firmware V1.01)
- Reduced hardware requirements thanks to an integrated earth lift switch
- Flexible system integration via SAE J1939 or Bender CAN, as well as a digital fault output
- E1 approval for use in road vehicles
- Customized variant with individually selectable threshold values, CAN settings, and connectors—easily adaptable to the respective vehicle platform via the online configurator
Applications
The ISOMETER® iso175 monitors ungrounded high-voltage systems in battery-electric, hybrid, and fuel-cell-powered vehicles:
- Trucks and transport vehicles
- Local and long-distance buses
- Construction and agricultural machinery
- Municipal and special-purpose vehicles
- Mobile work machines
- Electric auxiliary drives and ePTO systems
ISOMETER® iso175 Variant(s)
Standard variants
| Type | Connector type (connection) | Interfaces | Configuration | FW version* | Art. No. |
|---|---|---|---|---|---|
| iso175C-32-SS | TYCO | HS-CAN SAE J1939 | Baud rate: 500 kBaud Response value: 100 kΩ (Error), 500 kΩ (Warning) | 1.00 | B91068201 |
| iso175C-42-SS | Samtec/Molex | HS-CAN SAE J1939 | Baud rate: 500 kBaud Response value: 100 kΩ (Error), 500 kΩ (Warning) | 1.00 | B91068202 |
| iso175C-32-SB | TYCO | HS-CAN Bender | Baud rate: 500 kBaud Response value: 100 kΩ (Error), 500 kΩ (Warning) | 1.01 | B91068203 |
| iso175C-42-SB | Samtec/Molex | HS-CAN Bender | Baud rate: 500 kBaud Response value: 100 kΩ (Error), 500 kΩ (Warning) | 1.01 | B91068204 |
Customer configuration
| Type | Connector type (connection) | Interfaces | Configuration | FW version* | Art. No. |
|---|---|---|---|---|---|
| See Standard variants | TYCO (side) or Samtec/Molex (top) | HS-CAN (SAE J1939 or Bender) | According to customer specifications | 1.01 | B91068200 |
Configure the iso175 to your specificationsConfigure the customised version of the iso175 to suit your application. |
* Extended functionality from firmware version V1.01 onwards:
The firmware enables more flexible configuration of CAN communication, including the CAN source address, baud rate, PGNs and transmission rates. In addition, the iso175 supports insulation monitoring in AC systems up to 480 V AC (50/60 Hz), for example for ePTO applications in commercial vehicles.
Optional Accessories for ISOMETER® iso175
| Description | Suitable for type | Art. No. |
|---|---|---|
| IR155 / iso175 fastening kit | All | B91068500 |
| IR155 / iso175 connection kit (TYCO) | iso175X-32-XX | B91068501 |
| IR155 /iso175 connection kit (Samtec/Molex) | iso175X-42-XX | B91068502 |
Downloads for ISOMETER® iso175
| Name | Category | Size | Language | Timestamp | D-/B-Number |
|---|---|---|---|---|---|
| Online Configurator for iso175 | Product Change Notifications | 272.6 KB | 2026/09/0101.09.2026 | ||
| Software Change iso175 | Product Change Notifications | 186.0 KB | 2026/07/2727.07.2026 | ||
| iso175 Samtec-Molex (PDF) | 3D file | 103.5 KB | 2025/07/0909.07.2025 | ||
| iso175 Samtec-Molex (STEP) | 3D file | 2.0 MB | 2025/07/0909.07.2025 | ||
| iso175 Tyco (PDF) | 3D file | 117.2 KB | 2025/07/0909.07.2025 | ||
| iso175 Tyco (STEP) | 3D file | 2.3 MB | 2025/07/0909.07.2025 | ||
| iso175 Cybersecurity case | Manuals | 517.0 KB | 2025/07/1010.07.2025 | ||
| iso175 Cybersecurity Safety Manual | Manuals | 600.6 KB | 2025/07/1010.07.2025 | ||
| iso175 Wasserstoff | Flyers | 236.9 KB | DE | 2025/03/3131.03.2025 | |
| iso175 Hydrogen | Flyers | 226.7 KB | EN | 2025/03/3131.03.2025 | |
| Vehicle sensors. ISOMETER®iso175/IR155 | Product Brochures | 1.4 MB | 2024/05/2424.05.2024 | ||
| iso175 Kunden-Konfigurationsdatei | Device configuration | 599.6 KB | DE | 2025/12/1515.12.2025 | D00415 |
| iso175 Customer configuration file | Device configuration | 605.9 KB | EN | 2025/12/1515.12.2025 | D00415 |
| iso175 | Flyers | 362.4 KB | 2024/01/2525.01.2024 | D00415 | |
| iso175 | Flyers | 362.3 KB | FR | 2024/01/2525.01.2024 | D00415 |
| iso175 - Standard CAN Specification | Application Notes | 248.4 KB | 2025/07/3030.07.2025 | D00415 | |
| iso175 - SAE J1939 Specification | Application Notes | 250.5 KB | 2025/07/3030.07.2025 | D00415 | |
| We are your eMobility partner! | Flyers | 262.3 KB | 2023/11/2929.11.2023 | ||
| iso175 | Manuals | 6.4 MB | EN | 2025/10/2323.10.2025 | D00415 |
| iso175 | Quickstarts | 434.2 KB | EN | 2025/08/0101.08.2025 | D00415 |
| iso175 | Datasheets | 3.3 MB | EN | 2025/08/0101.08.2025 | D00415 |
