WFA-EXPROOF Weatherproof Analogue Call Station, Explosionproof

with optional 25W additional amplifier   The WFA-EXPROOF Weatherproof Analogue Call Stations enable direct voice connections with other call stations and loudspeaker announcements in potentially explosive environments. When the robust double-toggle call buttons are pressed, light barriers (opto-couplers) are activated without contact, which allows permanent use in aggressive, damp and also dusty environments, especially in areas enriched with explosive gases and dusts. The call stations are particularly energy efficient. Fully metallised inner housing prevents electromagnetic incompatibility (EMC) Service-friendly modular design thanks to bolting system EX-protection through pressure resistant encapsulation Integrated loudspeaker and electret microphone Simple upgrade / extension of the speech keys Dust and waterproof, glass fibre reinforced polyester housing Double toggle intercom buttons with opto-coupler, 2 lines each Connector for optional auxiliary amplifier Line keys can be freely assigned as destination keys Indication of busy and call signalling through light emitting diodes Standard lower-priority circuit Switchable volume reduction e.g. for night operation Adjustable microphone sensitivity (noise compensated microphone) Low power consumption