sentronic power supply

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If a door is being held open by the LCN SEM 7800/1900 magnet or any ME/SE Series Sentronic LCN closer, you can remotely release that door to close by ordering the following parts and wiring per ST ...
General term fo rthe fire/life safety products offered by LCN
The Von Duprin exit alarm ALK draws about .25 amp. PS902 power supply powers up to 8 exit alarm ALK. PS904/914 powers up to 16 exit alarm ALK. PS906 powers up to 24 exit alarm ALK. 
This is not possible.  Due to the device's 16 Amp in-rush it would require it's own PS914-2RS which will power 1 or 2 devices.
The 900-4R is used with PS900 series power supplies. The 900-4R has four independent outputs and inputs with no time delay.  You can use any of these outputs with electrified hardware including EL...
Reference The 914 Installation instructions.
Exit alarm ALK operates with 9VDC battery and doesn't required a power supply.If you choose to hard wire the exit alarm ALK use the PS902 power supply.Exit alarm ALK requires 24VDC regulated power ...