DC insulation monitor ISOMETER® isoUG425

RS485Modbus RTU

Insulation monitoring device for DC IT systems Application control circuits Two separately configurable response values Multi-functional LC display Passive measuring method without measuring voltage The ISOMETER® monitors the asymmetrical insulation resistance of unearthed DC systems (IT systems) with nominal voltages of DC 12…120 V. The maximum permissible system leakage capacitance Ce is 50 μF. Features Monitoring of asymmetrical insulation resistances for unearthed DC systems Measurement of the system voltage (r.m.s. and DC) with undervoltage and overvoltage detection Measurement of the system DC voltages to earth (L+/PE and L-/PE) Configurable adaptation to the system leakage capacitance up to 5 μF Selectable start-up delay, response delay and delay on release Two separately adjustable response value ranges of 1…100 kΩ (Alarm 1, Alarm 2) Alarm signalling via LEDs (AL1, AL2), a display and alarm relays (K1, K2) N/C operation or N/O operation of the relays selectable Measured value indication via multifunctional LCD Fault memory can be activated RS-485 (galvanically isolated) including the following protocols: – BMS interface (Bender measuring device interface) for data exchange with other Bender components – Modbus RTU – IsoData (for continuous data output) Password protection to prevent unauthorised parameter changes Applications Simple battery systems Conveniently sized DC control voltage systems DC lamp circuits