Campbell Scientific CR200X CR200/CR200X-series Dataloggers - Page 65
CR200X Power Supply
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Section 6. CR200(X) Power Supply Reliable power is the foundation of a reliable data acquisition system. When designing a power supply, consideration should be made regarding worst-case power requirements and environmental extremes. Contact Campbell Scientific if assistance in selecting a power supply is needed, particularly with applications in extreme environments. 6.1 Power Requirement The CR200(X) operates from a DC power supply with voltage ranging from 7 to 16 V. It is internally protected against accidental polarity reversal. Input voltages in excess of 18 V may damage the CR200(X) and/or power supply. Caution The Battery + and Battery - terminals on the wiring panel are not regulated by the CR200(X); they obtain the same power directly the POWER IN terminal. When using the CR200(X) wiring panel to source power to other 12 V devices, be sure the power supply regulates the voltage within a the range specified by the manufacturer of the connected device. 6.2 Calculating Power Consumption Read More! Power Requirements (p. 29). System operating time for batteries can be determined by dividing the battery capacity (ampere-hours) by the average system current drain (amperes). The CR200(X) typically has an average current drain of less than 3 mA. The duty cycle of the radio will add to the current drain. Be sure to include the current used by any powered sensors when calculating power supply requirements. 6.3 Power Supplies Complete power supply information is available in manual or brochure form at www.campbellsci.com. 6.3.1 Battery Connection Any clean, 7 to 16 VDC supply may be connected to the Battery + and Battery connector terminals on the front panel. When connecting external power to the CR200(X), insert the positive lead into the Battery + terminal. Insert the ground lead into the Battery - terminal. 53