The adapter board is an option for the HLSPS-DB2 power supply if more than one fault relay is required. The adapter board is equipped with a relay for mains, battery and collective faults as well as earth faults. In order to connect the DB-2 to the ESSER loop, the adapter board and the esserbus alarm tranponder (item no. 808623) are required. The optional tranpsonder is plugged onto the adapter board and the power supply unit is thus integrated into the esserbus. The fault relays are designed as changeover contacts, so the relays can still be used while the esserbus alarm transponder is attached.
