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9.6
Connection via CPI Port
FIGURE 9-8 CR6 Data Logger
With the addition of a 31056 CPI-RS-232 adaptor, connection of the CR6 to
the DCP-INTELIMAX-RS232 is identical to that described in Section 9.5 with
the 31056 adapator serving as the RS-232 port.
10.
Power Considerations
10.1
Current Requirements
Because of the transmitting current drain of cell phone modems, the length and
frequency of both incoming and outgoing calls should be considered when
determining the best power supply for your system:
Where pre-determined call intervals are short and infrequent (e.g.: 10
minutes per day), the system can typically be powered by sealed
rechargeable batteries supplemented by a charging source (AC power
or solar panel)
For longer calls or more frequent time intervals (e.g.: 20 to 30 minutes
every hour), a deep-cycle battery trickle-charged by AC power would
be a better option for powering the system.
When communications between the data logger and a computer must
be available for long periods of time, AC power may be required.