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I managed to wire both sounders using tamper in series, i set one sounder to scb and other to sab, i then fitted two contacts one with built in resistors so i cut the 1 k resistors for tamper and switch and wired bot wires to zone 1 and 0. The other contact i added a resistor between tamper and alarm and wired to zone 2 and 0. So that the panel sees 1K closed and 2K open all is working fine and have programmed and tested.

so just to clarify bell goes to trigger output ? t is connected to tamper return and link 0v and t in bellbox ? And to connect front and rear bellboxes together how do i link the tamper return and power Also how is wiring done for contacts should i use door contacts with built in resistors ?

Hi, Installation is of a galaxy 2-12 panel with 2 x keypads, 4 x bosch blue line gen 2 grade 2 pirs, 2 x door contacts and 2 x pyronix deltabell sirens. I have managed to power up panel with no faults by adding 1k resistors I made sure there was no faults I then 4 x pir sensors all working fine. However I am struggling with a few issues as I have not used the galaxy panel before and wiring was already done, I am just carrying out commission and test for a family relation. The siren is not working correctly so far have only wired in 1, I have enabled battery, set to scb and is set to default negative applied, connections as below; Bell Box Control Panel + 12vBell +12V -12V0V Strobe Strobe BellBell +12v ? TTrigger TT Then added a link from T on control panel to 0V The siren has flashing alternate led’s but fails to operate when alarm is set off do I need to program galaxy 2 for output ? also please confirm wiring I am unsure of bell to bell +12v connection.Also when connection of 2 sirens how do I loop the tamper. I am confident with a multimeter and can measure voltages and continuity. I have attached scan of installation guide and panel layout. How do I add and wire up the door contact as panel requires 2K can I use 2 terminal and 4 terminal or should I scrap those purchased and buy these ? https://www.securitywarehouse.co.uk/catalog/elmdene-rft-flush-20mm-brown-contact-grade-2-green-resistors-p-4175.html Your help and suggestions appreciated in advance, I have not wired up the galaxy panel before I have wired up many Honeywell panels in the past including the accenta / optima range.