The XP95 Intrinsically Safe Optical Smoke Detector uses the light scatter principle to quickly and effectively detect a range of slow-burning and smoldering fires.
The standard XP95 communications protocol is designed to be very robust and to give maximum flexibility to designers of loop driver circuits. The current and voltage levels used are chosen to be well above noise levels and to operate in adverse conditions with a minimum of errors. The maximum voltage and current levels used are, however, outside the limits of intrinsically safe (I.S.) systems and it has been necessary to apply lower limiting values for both current and voltage in the I.S. range.
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