MicroStrain, Inc.
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Power
The SG-Link® OEM must be powered by a voltage source capable of delivering 3.2 to
9.0 volts DC, and at least 50 mA. The power must be applied through the wiring terminal
strip; pins 4 or 7 GND and pin 8 Input Power (see
Terminal Strip
section of this manual).
Be careful to observe correct polarity, otherwise damage may result.
The SG-Link® OEM has no power on/off switch. Power-up-and-down must be
controlled externally.
Re-chargeable or non-rechargeable batteries may be used.
The SG-Link® OEM starter kit is shipped with a 9 volt battery connector and attached 8”
2-lead pigtail to facilitate battery connection to the Terminal Strip (see Terminal Strip
section).
Here are some example battery life calculations:
•
Streaming consumes ~25 mA. If the battery capacity is 200 mAh, the SG-Link®
OEM will stream for ~8 hours before the battery is exhausted.
•
Datalogging consumes ~25 mA. If the battery capacity is 200 mAh, the SG-
Link® OEM will datalog for ~8 hours before the battery is exhausted.
•
Sleep mode consumes ~0.5 mA. If the battery capacity is 200 mAh, the SG-
Link® OEM will sleep for ~400 hours before the battery is exhausted.
Power Profile
Power consumption on the SG-Link® OEM is influenced by a wide range of variables
including operating mode, sampling rate and number of active channels. A current power
profile which outlines power consumption for the matrix of operating states is available
at:
http://www.microstrain.com/pdf/SG-Link_PowerProfile_node_FW_4_99.pdf
