1.11.020 Intrinsic safety: Visual Intrinsically Safe L.E.D Beacon The IS-L101L unit is an intrinsically safe eld mounting beacon which provides a bright ashing warning signal. The unit can be used independently or combined with an IS-A105N 49 alarm sounder. Combination units can utilise a common zener barrier or galvanic isolator and may be coupled together or mounted seperately. With the IS-A105N the alarm accept function can be utilised. By closing a pair of external contacts (i.e push switch) the operator may silence the alarm for set periods between 5 seconds and 2 hours. If after the preset time the alarm condition still exists the sounder will activate again. 93.0mm [3.66 in.] Light source: Specication: Array of 6 high intensity L.E.D’s. Red, Amber, Blue & Green Standalone mode: 2Hz (2 double flashes per second) Effective candela: IS Class l, Division 1, Groups A, B, C, D T4 On : 1 Hz (1 double flash per second) Silenced: 2 Hz (2 double flashes per second) (alarm accepted) • Input overload and reverse current protection • Prismatic lens optimises L.E.D eectiveness GOST-R 0ExiaIICT4 IP65 -40° to +60°C [x]: Lens colour: A: Amber B: Blue G: Green R: Red 16-28vdc via Zener barrier or galvanic isolator Stand alone: 25mA typical With IS-A105N: 35mA typical May be powered from any certied Zener barrier or galvanic isloator whose output parameters do not exceed : Ingress protection: Housing material: Operating temp: Storage temp: Relative humidity: 1 x M20 clearance gland knockout. • IECEx certicate: IECEx SIR 04.0039X, IEC 60079-0 : 2007, IEC 60079-11 : 2006, IEC 60079-26 : 2006 Stainless Steel Cable entries: Housing colour: *All candela data is representative of performance with amber lens at optimum voltage. • GOST-R certificate: POCC GB.JB05.B03365