Insulation monitoring device for unearthed drive systems (IT systems) in road vehicles

ISOMETER® iso175 Insulation monitoring device for unearthed drive systems (IT systems) in road vehicles Device features • Suitable for 12 V and 24 V DC systems (supply voltage) • Insulation monitoring of DC insulation faults for unearthed systems (IT systems) • Insulation monitoring of AC insulation faults for unearthed systems (IT systems) (from firmware version D720V1.01) • Continuous insulation resistance measurement R_iso_corrected and R_iso_original • Response time <30s for insulation resistances < 500 Q/Volt and system leakage capacitances < 2pF • Insulation measurement of larger leakage...

Wiring diagram Connector* Pins 1 and 3 must be on the same potential for fault-free operation. The electrical design of the status output is an open-collector topology, which requires a pull-down resistor against terminal 31 for a defined output signal. Here a 2k2 resistor with a power rating of at least 1 W is recommended. The ISOMETER® furnished with an onboard CAN-bus termination with 120 Q, which can be activated by plugging a jumper (for a recommendation see chapter "Technical data") to plug connector A. For details on the connectors required to connect to the HV system as well as to the...

Wiring example LV: protrudes 1 mm from the printed circuit board edge Red markings: fastening positions

Technical data Insulation coordination acc. to IEC 60664-1 Measuring range Protective separation (reinforced insulation) Rated impulse voltage Overvoltage category Voltage test Pollution degree R_iso_corrected R_iso_original Insulation: R_iso_neg* Insulation: R_iso_pos* Voltage: HV system voltage measurement between (L1/L2) – (terminal 31, terminal 15, E, CANH,CANL, OKHS) 6000 V II DC 4200 V/ 1 min 2 Supply / monitored IT system Supply voltage Us Tolerance Supply voltage Us Self consumption, no load at output Max. operating current Is HV voltage range (L1/L2) Un Tolerance Un Recommended back-up-fuse...

Measuring circuit Operating mode System leakage capacitance Ce max. Standard profile < 5pF High capacity (capacitance) < 10 pF Status output OKhs OKhs (High-Side driver) high Us* > Us -2 V OKhs (High-Side driver) low Us* < 0,2 V Permissible output current max. 80 mA * With correctly connected pull-down resistor (2k2 O) Classification of climatic conditions acc. to IEC 60721 Classification of mechanical conditions acc. to IEC 60721 max. 1 % of the length or width of the PCB Protective paint (ELPEGUARD® SL 1307 FLZ) 37 g ±3 g via jumper: Recommended: Weitronic W+P Products Jumper series 165. Manufacturer...

Standards and approvals The ISOMETER® iso175 has been developed in accordance with the following standards and approvals: • Insulation measurement functions based on: IEC 61557-8 An assessment in accordance with (UN)ECE R155, R156 and ISO/SAE 21434 has been carried out. Further information is documented in the separately available Cybersecurity Case and in the Cybersecurity Safety Manual. The documents are available for download: Standard variants • Tyco-Micro Mate-N-Lok™, 1445022-2 LV connection • Tyco-Micro Mate-N-Lok™, 1445022-8 Crimp contacts, suitable for both connections • Tyco-Micro Mate-N-Lok™...

Customized variants* RBENDERBender GmbH & Co. KG Londorfer StraGe 65 35305 Grunberq Germany © Bender GmbH & Co. KG, Germany Subject to change! The specified standards take into account the edition valid until 07.2025 unless otherwise indicated.