Operation Manual

Terminal Descriptions
ACC (D-SUB 15 Pin Connector)
Pin No. Name I/O Description Specifi cation
1 SB O DC Power (Switched B) Output 13.6 V ±15% Max. 2 A
2 IGN I Igintion Signal Input
Min. Input: 10.8 V
Max. Input: 16.0 V
3 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 k
6 FNC1/ TXD I/O Programmable/ PC Serial Data from Radio High Impedance
7 FNC2/ RXD I/O Programmable/ PC Serial Data to Radio High Impedance
8 FNC3 I/O Programmable High Impedance
9 FNC4 I/O Programmable High Impedance
10 FNC5 I/O Programmable High Impedance
11 FNC6 I/O Programmable High Impedance
12 50MC O DC Power Output 5 V, Max 100 mA
13 HR1 I Horn Alert Signal Input Max 2 A
14 HR2 O Horn Alert Signal Output Max 2 A
15 GND — Ground Ground
Speaker Jack (3.5 mm Phone Jack) 4 W/ 4 
Pin No. Name I/O Description Specifi cation
1 SPO O External Speaker Output 4 
3 GND — Ground Ground
DC Input Connector
Pin No. Name I/O Description Specifi cation
Red B I DC Power Input 13.6 V ±15%
Black GND I Ground Ground
Microphone Jack
Pin No. Name I/O Description Specifi cation
1 MBL O MIC Backlight Control High Impedance
2 SB O DC Power (Switched B) Output 13.6 V ±15%
3 GND — Ground Ground
4 PTT/ TXD I/O PTT/ PC Serial Data from Radio High Impedance
5 ME — Mic Ground Ground
6 MIC I Mic Signal Input 600 
7 HOOK/ RXD I Hook/ PC Serial Data to Radio High Impedance
8 DM I/O Mic Data Detection High Impedance
RF Antenna Terminal
50  impedance
GPS Antenna Terminal <NX-720HG/ NX-820HG/ NX-920G only>
50  impedance