P522 signal processors are panel mounted, fail-safe, self-checking signal processors that are used with two switched S55XBE series viewing heads. They offer independent gain adjustments for each sensor and multiple flicker set points for IR which makes them ideal for applications where a high level of discrimination is required. The P522 signal processors have battery backup to assure application continuity in case of a mains power interruption.
P522DC is for 24 V DC powered burner systems and 24 V DC battery backup
P522AC is for 85-264 V AC, 50/60 Hz powered burner systems and has 24 V DC battery backup. Can be used for 24 V DC systems also, without battery backup.