Title: Hardware Installation Guide.pdf
1.1.2DC PowerAll OnGuard hardware products can use a DC power source.When using a DC power supply for a hardware product, the DC power must be isolated electrically from the AC input side and non-switching, regulated DC power. Readers require +5 or +12 VDC, and all other panels require either 12 VDC or 12 VAC (except the LNL-1300, LNL-1300e, and LNL-8000 which require 12 VDC, only).DC power must be supplied through a diode for reverse polarity protection, and must be filtered and regulated for the electronics. Products intended to be powered from DC should never be powered with an AC transformer with rectifiers.The Multiplexer requires a regulated, low ripple (under 20 mV P/P). The power input is fused and protected from polarity reversal, and a crowbar over-voltage circuit protects against application of wrong voltages.Do not apply greater than 12 VDC ±15% to any hardware product.