5.13.1. Resetting the GSM Commander (GCXXXX+)
The GSM Commander will leave the factory in a constant reset state.
The moment an external power supply is connected to the GSM Commander, the internal battery will
switch on.
Now that it is almost impossible to turn the GSM Commander off, it may be a problem to reset it. To
reset the GSM Commander, the "Turn-Off " dongle that is supplied with the unit must be inserted into
the GSM Commander's RS232 port. This will place the GSM Commander in in a constant reset state.
Removing it will return the GSM Commander to normal functionality.
5.13.2. Pitfalls
It is NOT recommended to remove or insert the SIM card while the GSM Commander is powered up,
thus we advise that the GSM Commander should first be in the reset state (See sec 5.4) before
removing or inserting the SIM card.
5.14. Expansion Unit
The GSM Commander supports comprehensive expansion by means of the GSM Commander Expansion
unit, which provides an additional 5 inputs and 5 outputs similar to the ones found on the GSM
Commander itself. A total of 6 Expansion units may be daisy chained to provide a maximum of 30
outputs and 30 inputs* in addition to those on the GSM Commander itself.
14V DC Jack and Battery Input on Expansion Unit
Each Expansion unit has both a 14V DC jack and battery input, so that it could also be powered by a
separate power supply and battery. Applying power to the Expansion unit either through the DC jack
or battery terminal is optional. The Expansion unit can draw power via the ribbon cable, but under
certain conditions it is better to supply a separate 14V source and battery to the expansion unit.
These conditions are:
➢ When the ribbon cable run becomes very long (>5m)
➢ If you are going to connect more than one expansion unit
➢ If you expect to draw power from the input on the Expansion unit
➢ If you expect most of the inputs and outputs on the expansion to likely be active at once
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