ISOMETER® iso175
The ISOMETER® iso175 insulation monitoring device is designed for unearthed drive systems in hybrid, fuel cell, and electric vehicles.
The device reliably detects insulation faults, significantly contributing to both electrical safety and the availability of the electrical system. A key success factor is the use of an active, patented measurement method, which allows insulation monitoring even when the high-voltage system is de-energised, prior to the connection of the energy storage system.
Thanks to the integrated earth switch, no additional relays or contactors are required. The ISOMETER® iso175 also ensures reliable insulation measurements even with high system leakage capacitances of up to 10 μF. With its integrated CAN interface, the insulation monitoring device can be easily integrated into modern systems, providing additional information to support and simplify system analysis.
The ISOMETER® iso175 insulation monitoring device is designed for unearthed drive systems in hybrid, fuel cell, and electric vehicles.
The device reliably detects insulation faults, significantly contributing to both electrical safety and the availability of the electrical system. A key success factor is the use of an active, patented measurement method, which allows insulation monitoring even when the high-voltage system is de-energised, prior to the connection of the energy storage system.
Thanks to the integrated earth switch, no additional relays or contactors are required. The ISOMETER® iso175 also ensures reliable insulation measurements even with high system leakage capacitances of up to 10 μF. With its integrated CAN interface, the insulation monitoring device can be easily integrated into modern systems, providing additional information to support and simplify system analysis.
Features
- Insulation measurement prior to energising the high-voltage system to ensure safe vehicle start-up
- Reliable insulation measurement for mains leakage capacitances of up to 10 µF
- Selectable measurement profiles to adapt the measurement behaviour to different vehicle architectures and operating conditions
- Insulation monitoring on the AC side of ePTO and comparable applications up to 480 V AC (from 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
- Customised version 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:
- Lorry and transport vehicles
- Local and long-distance buses
- Construction and agricultural machinery
- Municipal and special-purpose vehicles
- Mobile machinery
- 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 Notification | 272.6 KB | 2026/09/0101.09.2026 | ||
| Software Change iso175 | Product Change Notification | 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 | Flyer | 236.9 KB | DE | 2025/03/3131.03.2025 | |
| iso175 Hydrogen | Flyer | 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 | Flyer | 362.4 KB | 2024/01/2525.01.2024 | D00415 | |
| iso175 | Flyer | 362.3 KB | FR | 2024/01/2525.01.2024 | D00415 |
| iso175 - Standard CAN Specification | Application note | 248.4 KB | 2025/07/3030.07.2025 | D00415 | |
| iso175 - SAE J1939 Specification | Application note | 250.5 KB | 2025/07/3030.07.2025 | D00415 | |
| We are your eMobility partner! | Flyer | 262.3 KB | 2023/11/2929.11.2023 | ||
| iso175 | Manuals | 3.8 MB | DE | 2025/10/2323.10.2025 | D00415 |
| iso175 | Manuals | 6.4 MB | EN | 2025/10/2323.10.2025 | D00415 |
| iso175 | Quickstarts | 434.2 KB | DE | 2025/08/0101.08.2025 | D00415 |
| iso175 | Quickstarts | 434.2 KB | EN | 2025/08/0101.08.2025 | D00415 |
| iso175 | Datasheets | 4.1 MB | DE | 2025/08/0101.08.2025 | D00415 |
| iso175 | Datasheets | 3.3 MB | EN | 2025/08/0101.08.2025 | D00415 |
