IRDH375-435 BENDER

Device version IRDH375B includes the following additional functions:

• History memory with real-time clock to store all alarm messages with date and time stamp

• Electrically isolated RS-485 interface (BMS protocol) for communication with other 

Bender devices

• Isometer disconnecting relays for the operation of several ISOMETER®s in coupled IT systems

• Current output 0(4)…20 mA

• Insulation monitoring for unearthed AC, 

AC/DC systems 0…793 V, DC 0…650 V

• Nominal voltage extendable via coupling 

device

• Two separately adjustable response values 

1 kΩ…10 MΩ 

• AMPPlus measurement method

• Automatic adaptation to the system 

leakage capacitance

• Info button to display device settings 

and the system leakage capacitance

• Continuous self monitoring, with automatic alarm message

• Automatic self test, selectable

• Connection for external kΩ indication

• Test and reset button 

• Connection external test and reset button

• Two separate alarm relays with two 

potential-free changeover contacts 

• N/O or N/C operation

• Alarm relay for system fault (N/C operation)

• Backlit LC display

• RS-485 interface

• Plug-in terminals

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