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Telemetry Module MT-021 User Manual

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5.2. Binary inputs I1 ... I4<br />

Internal optoisolated binary inputs marked as I1...I4 may work only in positive logic. All<br />

binary inputs have same reference - module's electrical ground - negative pole of the<br />

power supply connected to GND pin.<br />

Connection scheme:<br />

Notice!<br />

Supply cables length < 10m.<br />

Signal cables length < 30m.<br />

For longer cables it is recommended to use external<br />

overvoltage protection.<br />

24

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