Power output specifications

System power out limits (when powered with 12 VDC):

Temperature (°C) Current Limit1 (A)
–40° 5.8
20° 3.7
70° 2.0

1 Limited by self-resetting thermal fuse

VX: Two independently configurable voltage terminals (VX1-VX2). VX outputs are produced by a 12-bit ClosedDAC Digital to analog conversion. The process that translates digital voltage levels to analog values.. In this case, these terminals are regularly used with resistive-bridge measurements (see Resistance measurements for more information). VX terminals can also be used to supply a switched, regulated 5 VDC power source to power digital sensors and toggle control lines.

NOTE:

CR300 series data loggers are not capable of applying reverse excitation. Set the RevEx parameter of all bridge measurement instructions to False.

  • Range: 150 to 5000 mV
  • Resolution: 1.6 mV
  • Maximum Source Current: 50 mA total, concurrently or independently.

See also Voltage measurements.

SW12V: Provides unregulated 12 VDC power with voltage equal to BAT+ input voltage. SW12V is disabled when operating on USB power only. A thermal fuse regulates current sourcing.

  • Thermal Fuse Hold Current (Overload causes voltage drop. Disconnect and let cool to reset. Operate at limit if the application can tolerate some fluctuation.):
    • 1200 mA @ -40 °C
    • 1100 mA @ 20 °C
    • 830 mA @ 70 °C

See also Power output.