878DEX / 879DEX / 888D & 889D Series
AdaptaHorn Grille Type Hazardous Location Horn Diode Polarized
The Edwards 878DEX, 879DEX, 888D and 889D Series are diode polarized, heavy-duty, high decibel, vibrating horn signals. They are intended for use in hazardous locations requiring electrical supervision of signaling circuit field wiring. For non-fire alarm applications, horns have a NEMA type 4X rating and may be used outdoors (recommended above temperatures of +25F).
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UL Listed for Class I, Division 1 and 2, Groups B, C, and D; Class II, Division 1 and 2, Groups E, F, and G; and Class III locations, UL Listed for outdoor locations NEMA Type 4X Rated (878DEX and 879DEX only)
- Wide operating voltage range -20% to +10% of nominal voltage
- Power connection wires embedded in sealing compound
- AE Bulletin, Electromechanical Noise Part II
Tips on dealing with electromechanical devices, and the electrical noise they can generate on fire alarm circuits.