The external connections are exposed via the screw terminals on the PCB. The functions of each terminal are explained in the table below.


Name
Function
Notes
Vin +
Main Power Input
6-16V. Connect positive from the power source here.
Vin -
Main Power Ground
0V. Connect ground from the power source here.
AIN 1
Analog Input 1
0-5V, 4096 levels
Gnd
Ground
Do not use for powering Flexi 1
Out 1
Switched Ground Out
1A Max. Provides a ground when on.
3.3v
Switch 3.3v Out
500mA. Mainly used for I2C
SDA
I2C Data

SCL
I2C Clock

Tx
RS232/TTL Transmit

Rx
RS232/TTL Receive

SDI-12 Data
SDI-12 Data

Vout
Switched Vout
500mA. Same voltage as Vin+