Control monitoring device ISOMETER® IR420-D4

electrical safetyfor medical IT systemsautomatic

Insulation monitoring device for AC IT systems Application control circuits According to IEC 61557-8 Two separately configurable response values Multi-functional LC display The ISOMETER® IR420-D4 monitors the insulation resistance of unearthed AC control circuits (IT systems) 0…300 V. If the systems to be monitored include DC components, such as switched-mode power supplies or solenoid valves, the display and operating characteristics may be affected. The display and response values apply to pure AC systems. An external supply voltage allows de-energised systems to be monitored too. Insulation monitoring for IT control circuits AC 0…300 V Two separately adjustable response values Preset function (automatic assignment of basic parameters) Connection monitoring system/earth LEDs: Power On, Alarm 1, Alarm 2 Internal/external test/reset button Two separate alarm relays (one changeover contact each) N/O or N/C operation, selectable Fault memory behaviour, selectable Self monitoring with automatic alarm message Multi-functional LC display Adjustable response delay Two-module enclosure (36 mm) RoHS-compliant Push-wire terminal (two terminals per connection)