There are three main ports on the back of the IndigoDUO and, optionally, 3 SMA connectors if you have the version with external antennae. From left to right on the back of the device, they are:



IndigoDUO Ports

  1. Iridium external antenna (Red washer on SMA connector – *IF FITTED)
  1. GPS external antenna (unmarked SMA connector – *IF FITTED)
  1. Cellular external antenna (unmarked SMA connector – *IF FITTED)
  1. Switch input port (Molex)
  1. Power/Serial port (Molex)
  1. Micro USB port (5V power)



Blown up connection diagrams


 


** Colours refer to supplied pig-tail cables from IndigoSat (South Africa)(Pty)Ltd.  Power Cables MUST be fused/via a CB.


IndigoDUO Molex Connectors

 

The IndigoDUO's RS232 spec interface is internally driven by the popular MAX3232 IC and accepts an input of -25V to +25V.