Power requirements

Power specifications for a communications option are shown within the specifications section for that option.

Protection: Power inputs are protected against surge, over-voltage, over-current, and reverse power. IEC 61000-4 Class 4 level.

Charger Input (CHG+ and CHG- terminals):

  • 16 to 32 VDC
  • Current limited to 0.9 A maximum
  • Power converter or solar panel input

External Batteries (BAT+ and BAT- terminals):

  • 10 to 18 VDC input
  • 12 VDC, lead-acid 7 Ah battery, typical

Internal Lithium Battery (see Internal battery for more information): 3 V coin cell CR2025 for battery-backed clock. 6-year life with no external power source.

Average Current Drain:

Assumes 12 VDC on BAT terminals — add 2 mA if using CHG terminals.

  • Idle: 1.5 mA
  • Active 1 Hz scan w/ one analog measurement: 5 mA
  • CR300 Active (Processor always on): 23 mA
  • CR310 Active (Processor always on): 36 mA
  • Serial (RS-232): Active + 5 mA
  • Ethernet power requirements (CR310 Only):
    • Ethernet idle: Active + 5 mA
    • Ethernet linked: Active + 20 mA

USB Power: Functions that will be active with USB 5 VDC include sending programs, adjusting data logger settings, and making some measurements. If USB is the only power source, then the VX1 and VX2 ranges are reduced to 150 to 2500 mV. The SW12V terminal will not be operational. For the control terminals (C1, C2), voltage output is limited to 4.75 V.

Cellular Average Additional Current Contribution at 12 VDC:

  • Idle: Connected to network, no data transfer.
    • -CELL200 average = 10 mA
    • -CELL205 average = 14 mA
    • -CELL210 average = 28 mA
    • -CELL215 average = 14 mA
    • -CELL220 average = 14 mA
    • -CELL225 average = 14 mA
  • Transfer/Receive:
    • -CELL200 average = 105 mA
    • -CELL205 average = 75 mA
    • -CELL210 average = 90 mA
    • -CELL215 average = 75 mA
    • -CELL220 average = 75 mA
    • -CELL225 average = 75 mA

Wi-Fi Additional Current Contribution at 12 VDC:

  • Client mode communicating: 70 mA typical
  • Client mode idle: 7 mA typical
  • Access point mode communicating: 70 mA
  • Access point mode idle: 62 mA typical
  • Idle (use IPNetPower() or DevConfig setting to disable): <0.1 mA

RF Average Additional Current Contribution at 12 VDC

  -RF407, -RF412, -RF427 -RF422
Transmit < 80 mA 20 mA
Idle On 12 mA 9.5 mA
Idle 0.5 s Power Mode 4 mA 3.5 mA
Idle 1 s Power Mode 3 mA 2 mA
Idle 4 s Power Mode 1.5 mA 1.5 mA

See also Power output.