Страница 1: ...a Zener barrier or galvanic isolator but at supply voltages above 16V the internal current limit will function and therefore it is recommended that they are not operated continuously with a direct sup...
Страница 2: ...h it is installed i e IP20 or better The total capacitance connected to terminals wrt i e the capacitance of the cable plus any other capacitance shall not exceed 83nF The equipment shall not be direc...
Страница 3: ...z Two Tone Chime Intermittent 745Hz Alternating 1000 2000Hz 0 5s Singapore 420Hz 0 625s Australian Alert 500 1200Hz 3 75s 0 25s Australian Evacuate Continuous 1000Hz Continuous 2000Hz Intermittent 800...
Страница 4: ...nds or conduit entries into the base and connect the field wiring to the appropriate sounder terminals as shown in section 6 and fig 2 of this manual The power supply terminals and are duplicated so t...
Страница 5: ...or by a mechanically activated switch on the hazardous area side of the isolator Safe Area Hazardous Area IS mA1 Sounder Galvanic Isolator Power Fig 7 Single stage alarm using galvanic isolator 7 2 Mu...
Страница 6: ...inal w r t terminal from a barrier having a maximum open circuit voltage Uo that is 28V and a maximum short circuit current Io that is 93mA where Io is resistively limited The IS mA1 sounders are mark...
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