Terminal DescriptionsACC (D-SUB 15 Pin Connector)Pin No. Name I/O Description Specification1 SB O DC Power (Switched B) Output 13.6 V ±15% Max. 2 A2 IGN I Igintion Signal Input Min. Input: 10.8 VMax. Input: 16.0 V3 SP2/PA O Loudspeaker Output/ Public Address Output 4 4 DETO O RX Detected Audio Output 280 mV p-p (typ.)5 DATAI I TX Data Input 100 k6 FNC1/ TXD I/O Programmable/ PC Serial Data from Radio High Impedance7 FNC2/ RXD I/O Programmable/ PC Serial Data to Radio High Impedance8 FNC3 I/O Programmable High Impedance9 FNC4 I/O Programmable High Impedance10 FNC5 I/O Programmable High Impedance11 FNC6 I/O Programmable High Impedance12 50MC O DC Power Output 5 V, Max 100 mA13 HR1 I Horn Alert Signal Input Max 2 A14 HR2 O Horn Alert Signal Output Max 2 A15 GND — Ground GroundSpeaker Jack (3.5 mm Phone Jack) 4 W/ 4 Pin No. Name I/O Description Specification1 SPO O External Speaker Output 4 3 GND — Ground GroundDC Input ConnectorPin No. Name I/O Description SpecificationRed B I DC Power Input 13.6 V ±15%Black GND I Ground GroundMicrophone JackPin No. Name I/O Description Specification1 MBL O MIC Backlight Control High Impedance2 SB O DC Power (Switched B) Output 13.6 V ±15%3 GND — Ground Ground4 PTT/ TXD I/O PTT/ PC Serial Data from Radio High Impedance5 ME — Mic Ground Ground6 MIC I Mic Signal Input 600 7 HOOK/ RXD I Hook/ PC Serial Data to Radio High Impedance8 DM I/O Mic Data Detection High ImpedanceRF Antenna Terminal50 impedanceGPS Antenna Terminal 50 impedance