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Telemetry Module MT-021 User Manual

Telemetry Module MT-021 User Manual

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NOTICE!<br />

Exceeding the range of accepted power supply voltage may cause<br />

faulty operation or damage to the module!<br />

3.3. SIM card<br />

<strong>MT</strong>-<strong>021</strong> telemetry module is equipped with standard miniature SIM card holder for<br />

connecting card to GSM modem.<br />

Proper placement of the SIM card is imperative for module's operation. The module<br />

accepts only SIM cards operating in low potential technology 3,3V.<br />

3.4. LED diodes<br />

LED indicators placed on <strong>MT</strong>-<strong>021</strong> front panel are convenient during module start up<br />

phase.<br />

The LED's have assigned following significance:<br />

PWR LED indicates module's activity,<br />

I1 ... I4 LED indicates state of binary inputs,<br />

Q1 ... Q4 LED indicates state of binary outputs,<br />

ERR LED indicates an error,<br />

GSM LED reflects current login to GSM network state,<br />

SGN LED reflects GSM signal strength,<br />

ACT (Tx i Rx) LEDs indicate GSM communication (TX - data transmission, RX - data<br />

reception),<br />

USB LED indicates USB port state.<br />

Detailed description can be found in LED signaling subchapter of Problem solving<br />

chapter.<br />

9

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