Function
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IRDH375_D00124_05_M_XXEN/01.2020
The alarm relays Alarm1/2 only switch after starting the self test function by
pressing the TEST button, that means if an automatic self test has been select-
ed, the alarm relays do not switch.
3.4.2 Relay K3: device fault alarm and EDS common message
Relay K3 is intended to signal device and connection errors of the ISOMETER®.
K3 is permanently set to N/C operation, with the contacts 31-34 normally
closed, that means when a fault occurs, the relay deenergizes (K3: 31-32 con-
nected).
Further details are described in "Chapter 3.4.1 Self test".
Behaviour of the analogue output
The settings for K3 are preset and cannot be adjusted.
Setting Manual test Automatic test
0-20 mA 20 mA
while test procedure
0 mA
The current value depends
on the insulation value
4-20 mA 20 mA
while test procedure
4 mA
The current value depends
on the insulation value
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