Open interface III

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!!Rear side [https://remoteqth.com/img/wiki-open-interface-3-02.png|noborder] *'''13 - SEQUENCER output''' CINCH - open collector (MAX 50V/500mA) *'''14 - PA-PTT output''' CINCH - dependency to rear PA PTT switch ** Open collector (MAX 50V/500mA) ** Relay (MAX 0,5A/125V AC, or 1A/24V DC) *'''15 - LAN''' - RJ45 connector - (if Ethernet optional module installed) *'''16 - TRX GND''' - M4 screw *'''17 - MIC''' - Jack 3,5mm - [microphone input|https://remoteqth.com/wiki/index.php?page=Open+interface+III#Microphone] - need preset input switch, dependency on type microphone used ** Dynamic microphone - JP7 open ** Electret microphone - JP7 short *'''18 - RADIO''' - D-SUB 25 pin female connector [Pin connection|https://remoteqth.com/wiki/index.php?page=Open+interface+III#RADIO_25_pin_D_SUB] *'''19 - PA PTT''' - manual switch - select what circuit will be switch PA-PTT output (CINCH and pin7 in RADIO connector) ** Open collector (MAX 50V/500mA) ** Relay (MAX 0,5A/125V AC, or 1A/24V DC) *'''20 - PC USB''' - USB B type connector for PC, with isolated ground *'''21 - FOOT SWITCH''' - CINCH - SSB PTT input is activated by grounding center pin *'''22 - INTERLOCK''' - CINCH - input is activated by grounding center pin - switches OFF all PTT signals, defined by Sequencer delay *'''23 - ACC''' - HDMI type - by default blinded [Read warning first!|https://remoteqth.com/wiki/index.php?page=Open+interface+III#Accessory_connector__HDMI_] *'''24 - POWER''' - input - DC jack 2,1/5,5mm diameter to connect input power 8-18V DC (center positive) with consumption 160mA/12V *'''25 - PADDLE''' - input - [Pinout|https://remoteqth.com/wiki/index.php?page=Open+interface+III#Paddle] *'''26 - HOLES''' - mount two optional switches, connect to any internal jumper on board - for example enable reset (JP3), or DTR to CW/FSK (JP4)
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