| http://www.w3.org/ns/prov#value | - For sixteen time slots each slave unit thus provides sixteen interfaces (channels), and during each time slot a single digital data bit or analogue level is transferred between that slave and the master on the data line, for example a command from the master to the slave to operate a load, such as a lamp or a motor, or an indication of the state of a load from the slave to the master.
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