5. INSTALLATION
5.1. Environment
Due to the make-up of the GSM Commander and it's electronics, we STRONGLY advise that it not be
installed in close proximity to a variable speed drive or any other electrically noisy equipment. DO
NOT install the GSM Commander into a metal enclosure unless an antenna is mounted on the outside
of the enclosure.
5.2. Power Supply
The GSM Commander has a 2.1mm DC jack connector where a power supply must be connected. The
power supply should have the following specifications:
• Output Voltage: 14V nominal
• Output Current: 0.5A
• Polarity:
A suitable power supply is supplied with the retail product.
Please Note: It is advised to use a 14V Switching Power Supply if more than one Expansion Unit is
connected to the GSM Commander.
In industrial applications, it is advised that the GSM Commander be installed into its own
metal housing and be powered from a separate power supply with a DC Filter. (As opposed to
sharing one with other equipment).
Please Note: While the GSM Commander has fairly rugged internal power supply circuitry, no
special provision for lightning protection is made. If the GSM Commander is used in an area that is
prone to thunderstorms, it is advisable to use a commercially available lightning suppressor (The
same applies to inputs or outputs that are connected to wires longer than 2 or 3 meters). The
guarantee does not cover damage resulting from lightning strikes! The GSM Commander can
operate reliably from voltages in the range of 12 to 24V DC.
5.3. USB Port
The GSM Commander provides a USB port that connects to a PC using the supplied USB cable. This
allows the PC to configure the unit.
5.4. SIM Card
The GSM Commander accepts a standard GSM SIM card from any network. The SIM card may be
prepaid or on contract. If the SIM Card is purchased as part of a prepaid plan, ensure than the card
is loaded with sufficient airtime.
WARNING: DO NOT Insert or remove the SIM card while the GSM Commander is powered!!
Note that airtime will decrease with every SMS that is sent from the unit. The unit can
automatically detect if the airtime is running low. It is user's responsibility to make sure than the
airtime is topped up. See your network's documentation on how to purchase and load airtime.
The SIM card is fitted into the back of the unit, as indicated by the legend on the enclosure. The SIM
card will click into place and is removed simply by pressing against it. The card will pop out with a
“click” sound, ready to be completely removed.
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