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W-PA SIP Public Announcer is used to broadcast emergency messages and communication in large environments such as shopping malls, supermarkets, airports, hospitals. The device has 10 Watt audio output and it still allows you to connect external loudspeakers and microphones. It can also act as a relay for activating door release switches or door locks via 1 embedded short-in detect port and 1 short-out control port. See /wiki/spaces/DOC/pages/30281148 for detailed technical characteristics.
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4 - Function key interface: connect switch components to this interface
5 - MIcrophone Microphone interface: it is recommended to use an electret condenser microphone (sensitivity: -38dB, bias voltage: 2.2V) and connect it with a shielded cable to the grounding screw to improve anti-interference
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The intercom function itself is implemented by placing calls from/ to the connected switch components.
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Note: W-PA and Viking W-100 Handsfree Doorbox To use W-PA with Viking W-1000, disconnect the circuit board and use 8 Ohm speaker, microphone and switch. |
Connection of switch components
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