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
- Suitable for 12 V and 24 V DC systems (supply voltage)
- Insulation monitoring of DC insulation faults for ungrounded systems (IT systems) DC 0…1000 V / AC 0…480 V 50/60 Hz (only variant B91068200 from firmware V1.01)
- Continuous insulation resistance measurement RF_corrected = 0…35 MΩ (RF_ original = 0…50 MΩ)
- Response time ≤ 30 s for insulation resistances ≤ 500 Ω/Volt and system leakage capacitances ≤ 2μF
- Insulation measurement for system leakage capacitances up to 10 μF can be configured by setting parameters in the high capacitance (“High Capacity“) profile.
- Insulation measurement also when the vehicle's HV electric system is not energized
- Integrated self-diagnosis (online self-test)
- HV connection monitoring (offline self-test)
- Continuous monitoring of the ground connection
- Undervoltage detection
- Ground connection can be disconnected
- Interfaces:
- Digital output for device error message (OKHS)
- As an alternative
- HS-CAN interface with the following protocols
- Bender CAN
- CAN-SAE J1939
- HS-CAN interface with the following protocols
- All outputs short-circuit proof
- Load-dump protection up to 58 V
High voltage disconnection function
Applications
- Ungrounded drive systems in road vehicles
- Onboard electrical battery isolation
- Insulation Monitoring in aviation, ground-based and maritime EV applications
ISOMETER® iso175 Variant(s)
Standard variants
| Type | Connector type (connection) | Interfaces | Configuration | FW version* | Art. No. |
|---|---|---|---|---|---|
| iso175C-32-SS | TYCO1 | HS-CAN SAE J1939 | Baud rate: 500 kBaud Response value: 100 kΩ (Error), 500 kΩ (Warning) | 1.00 | B91068201 |
| iso175C-42-SS | Samtec/Molex2 | HS-CAN SAE J1939 | Baud rate: 500 kBaud Response value: 100 kΩ (Error), 500 kΩ (Warning) | 1.00 | B91068202 |
| iso175C-32-SB | TYCO1 | HS-CAN Bender | Baud rate: 500 kBaud Response value: 100 kΩ (Error), 500 kΩ (Warning) | 1.00 | B91068203 |
| iso175C-42-SB | Samtec/Molex2 | HS-CAN Bender | Baud rate: 500 kBaud Response value: 100 kΩ (Error), 500 kΩ (Warning) | 1.00 | B91068204 |
1 HV+ / HV- connections
| 2 HV+ / HV- connections
|
Cable recommendation for proper functioning of the offline self test: AlphaWire (Art. No. 5875)
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 |
The list for customer configuration can be found in the Downloads area.
* 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 |
|---|---|---|---|---|---|
| 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 |
