ISOMETER® IR427 with alarm indicator and test combination MK7 Insulation monitoring device with integrated load and temperature monitoring for medical IT systems in accordance with IEC 60364-7-710, IEC 61557-8 and DIN VDE 0100-710

ISOMETER® IR427 Insulation monitoring device with integrated load and temperature monitoring for medical IT systems in accordance with with alarm indicator and iec 60364-7-710 and din vde 0100-710 Device features • Insulation monitoring for medical IT systems • Load and temperature monitoring for IT system transformers • Adjustable response value for insulation monitoring • Adjustable load current response value • Integrated voltage monitoring for four alarm and test combinations MK7 • Temperature monitoring with PTC thermistor or bimetal switch • Connection monitoring earth • LEDs: Power On,...

RBENDER Test function/connection monitoring The device carries out a self test when supply voltage is fed and later at hourly intervals. During the self test, the internal device functions, the connections to earth (E/KE) and the current transformer connections are monitored for interrruption and short-circuit. In the event of a fault, the alarm relay K1 switches and the LEDs ON/AL1/AL2 flash. The respective error code appears on the LC display. After eliminating the fault, the alarm relay automatically switches to its initial position. By pressing the test button, on the IR427 or on the MK7,...

Wiring diagram Separate connection of E, KE to PE Connection to the IT system to be monitored; US for alarm indicator and test combination MK7 RS-485 interface; Supply voltage US (see nameplate) 6 A fuse recommended. Connection to temperature sensors (PTC) Connection to the measuring current transformer (STW2) Terminate the connection with switch R (on, off) if the device is connected at the end of the bus Alarm relay K1

Operating room Technical room PE = Protective earth PA = Equipotential bonding ZPA = Supplementary equipotential bonding Ordering information Nominal system voltage Un1) MK7 Remote alarm indicator and test combination Absolute values Suitable system components Type designation Type designation Measuring current transformers Mounting frame

Technical data ISOMETER® IR427 Insulation coordination acc. to IEC 60664-1/IEC 60664-3 Rated insulation voltage 250 V Rated impulse voltage/pollution degree 4 kV/3 Protective separation (reinforced insulation) between Interfaces for STW2 measuring current transformer and temperature sensor Supply voltage Supply voltage Us Power consumption Switching elements Number 1 changeover contact Operating principle N/C operation or N/O operation (N/C operation)* Electrical endurance, number of cycles 10.000 Contact data acc. to IEC 60947-5-1 Utilisation category AC-13 / AC-14 / DC-12 / DC-12 / DC-12 Rated...

Technical data ISOMETER® MK7 Rated insulation voltage 50 V Rated impulse voltage/pollution degree 500 V/3 Supply voltage Climatic class acc. to IEC 60721 (except condensation and formation of ice) Classification of mechanical conditions acc. to IEC 60721: Connection screw-type terminals Connection properties Flexible with ferrule 0.2...1.5 mm2 (awg 24.16) Operating mode continuous operation Degree of protection, internal components (IEC 60529) IP30 Degree of protection, terminals (IEC 60529) IP20 Front plate colour alpine white Flush-mounting enclosure, diameter (included in the scope of delivery)...

Bender GmbH & Co. KG Londorfer Straße 65 35305 Grünberg Germany Tel.: +49 6401 807-0 [email protected] www.bender.de © Bender GmbH & Co. KG, Germany Subject to change! The specified standards take into account the edition valid until 08.2023 unless otherwise indicated.