A-ISOMETER® IRDH375 IRDH375B - Bender
A-ISOMETER® IRDH375 IRDH375B - Bender
A-ISOMETER® IRDH375 IRDH375B - Bender
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Functionsulation monitoring is started.With this function, selective disconnection of an <strong>IRDH375</strong> in interconnectedIT systems can be carried out via auxiliary contacts of the respective couplingswitch. One coupling switch each in a line-type or ring-type arrangement candeactivate a subsequent <strong>IRDH375</strong>. This arrangement guarantees that onlyone A-ISOMETER® is active in each galvanically connected system. In a ringtypearrangement with all coupling switches closed, it can be assumed thatall A-ISOMETERs® are deactivated. In order to prevent this, a BMS Master(<strong>IRDH375</strong>B BMS address 1) monitors the condition of the function input F1/F2 of all slave A-ISOMETERs®. When all slave A-ISOMETERs® are in theSTANDBY mode, the insulation monitoring function of the MasterA-ISOMETER® and hence the function input F1/F2 of the Master are withoutfunction in this mode.Details are shown in the graphic below.BMS bus (A/B, RS485)F1/F2<strong>IRDH375</strong>BAddr. 1 Addr. 2F1/F2 <strong>IRDH375</strong>BPEPEGIT system 1 IT system 2GGIT system 4IT system 3G<strong>IRDH375</strong>BPEAddr. 4 Addr. 3<strong>IRDH375</strong>BF1/F2 F1/F2PE18 TGH1352en/11.2004
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