Function
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IRDH575_D00089_05_M_XXEN/01.2020
3.5.8 Relay K3: device fault alarm and EDS common message
Relay K3 is intended to signal device and connection errors of the
ISOMETER®. In the Master mode with bus address 1, EDS alarm messages can
be collectively indicated by the K3 relay as well as system fault messages. Coll-
ective indication of the EDS alarms by K3 can be disabled by selecting „K3
Alarm: off“ from the "EDS Setup" menu. Refer to page 63.
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 3.5.7 Self test". Even when a protocol
converter of the FTC470… series is installed in a BMS system which is tem-
porarily taking over the Master function is, the function collective EDS mes-
sage will remain. This function is directly dependent on BMS address 1, the
Master status is a secondary factor.
The settings for K3 are preset and cannot be adjusted.
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