automatic voltage selection

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The entire series of mag locks that Schlage provides advertises 12vdc or 24vdc because they will automatically determine what voltage is being used and switch the internal circuitry based on that v...
The 871-2 option board on PS873 power supply provides output voltage when an input such as card reader is activated. If 871-2 board is programmed for sequential operation when either input is activ...
Hold Open Closers & Magnets (Fire/Life safety products) provide a wide range of solutions.  Single or multi-point hold open closers Utilize an electromechanical closer. Hold the door o...
If the Main AC fuse is blowing, the control box is defective and needs to be replaced.  The "Main Fuse" is a (5x20MM) 1 Amp Slow Blow fuse. If the 12VAC fuse is blowing, verify they are not trying...
The input voltage for the 8310-865 (433 MHz) receiver is 12-24 VAC/VDC +/-10%, the current draw is 250mA (0.25A).
The following items may cause the  PS900 series power supply to have no DC output voltage. 1. If  the DC voltage selection jumper is missing, the power supply will not provide any D...