Figure 55 Blue Sign Switch Connection - Humminbird AIS 100 Installation And Operaion Manual

Installation
Do not connect a voltage source to the blue sign switch connections.
EXT_DISP_IN
A B GND
A B GND
EXT_DISP_OUT

Figure 55 Blue sign switch connection

Page 54
PILOT_IN DGPS_IN LR_IN SEN1
A B GND A B GND A B GND A B
A B GND A B GND A B GND COM NC
PILOT_OUT DGPS_OUT LR_OUT ALARM
SEN2 SEN3
GND A B GND A B GND
NO GND GND GND SM BS COM
SHIELD SWITCHES
Blue sign switch