VESDA VSP-974 Rotary Valve GN-503F (918-0007-002) The low frequency sounder and

The low frequency sounder and low frequency sounder strobes were designed to address the NFPA 72 sleeping space requirements that require a low frequency notification appliance that operates within frequency range of 520 Hz ± 10% and is of a square wave tone

and residential applications

• CSFM: 7300-1525:0103

It provides either a 2-wire or 4-wire fault tolerant initiating device circuit (IDC) for normally open contact fire alarm and supervisory devices or normally open or closed security devices

• Green LED indicates normal operation

VESDA VSP-974 Rotary Valve GN-503F (918-0007-002) The low frequency sounder andVesda VSP 974 VESDA E VEA Rotary Valve