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Function

IRDH275_D00122_02_M_XXEN/10.2016

ISOnet Function (COM SETUP)

Select "ISOnet=ON" from the COM SETUP menu to activate this function. This

function is a type of scanning function. The BMS Master activated via the

ISOnet function controls the ISOnet slave devices via the BMS bus. Once an

ISOMETER

has finished its measurement cycle, the authorization for measur-

ing the insulation resistance is passed on from the ISOnet Master to the next

slave.

While an ISOMETER

is carrying out a measurement all other ISOMETER

s are

in the STANDBY mode. In this way it can be prevented that the ISOMETERs

disturb each other in interconnected systems.

In comparison to the solution coupling switches and function input F1/F2, the

response time is prolonged, since no continuous measurement takes place.

The advantage is that no auxiliary contacts of a coupling switch are required.

Furthermore, this solution is ideally suited for capacitive IT systems or IT sys-

tems connected via diodes.

An ISOnet slave checks whether there is a Master available in the network. If

there is no Master available, the fault message "ISOnet Master?" appears on

the display after approximately 1 hour. Additionally, the LED for device errors

lights and the Relay K2 switches. When the ISOnet function is activated, the

function input F1/F2 will be disconnected.

Bender ISOMETER IRDH275 User Manual

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