Pin 12
Analog Input 3 (AIN3)
Not populated*
Pin 13
Analog Input 1 (AIN1)
Not populated*
Pin 14
Analog Ground
Not populated*
Pin 15
Digital Output 3b (NO3b) Blue/White
Pin 16
Digital Output 3a (NO3a) Blue
Pin 17
Digital Output 1b (NO1b) Green/White
Pin 18
Digital Output 1a (NO1a) Green
Pin 19
Not used
Not populated*
Pin 20
Digital Ground
Not populated*
Pin 21
Digital Input 3 (DIN3)
Gray
Pin 22
Digital Input 1 (DIN1)
Yellow
* Pigtail leads are available from GPS Logic for populating unfilled slots in the I/O connector.
Digital Outputs 4a and 4b are reserved for controlling the power of a connected Garmin
navigation device. Pins 4 and 5 will be connected whenever the vehicle ignition is activated,
or a Garmin message is received. To use these, connect Digital Output 4a to a constant hot
source via a 3A fuse. Connect Digital Output 4b to the red wire on the Garmin FMI 40 data
cable.
5.11.1.
I/O Signal Specifications
The following values are acceptable ranges for digital inputs and outputs:
Input Type
Label
Specification
Analog Input
AIN1 … AIN4
Input voltage: 0 to +28V
Digital Input
DIN1 … DIN4
Schmitt-trigger inputs:
Positive threshold: 2.2V max
Negative threshold: 0.6V min
Maximum input: 5.5V
Digital Output
NO1a … NO4b
Nominal switching capacity (resistive load):
1A, 30VDC
0.3A, 125VAC
The default power up state for the digital outputs is normally open (
a
and
b
pins
disconnected).
Page 54 of 59
