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.

Charge Terminal Characteristics (CHG+ and CHG-):

  • Input from Power converter or solar panel
  • *ES1 PS2 energy sources only
  • 16 to 32 VDC
  • Hold Current limit at 1.1 A @ 20 °C

Battery Terminal Characteristics (BAT+ and BAT-):

  • Input from external battery, 7 Ah lead-acid typical
  • Voltage input 12 VDC only
  • Hold Current limit 3.7 A @ 20 °C
NOTE:

*Energy Source Class 1 (ES1) and Power Source Class 2 (PS2), as defined in Clauses 5 and 7 of IEC/AS/NZS 62368-1:2022.

Internal Lithium Battery (see Internal battery for more information): 3 V coin cell CR2032X 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: 0.5 mA
  • Active 1 Hz scan w/ one analog measurement: 1.5 mA
  • Active (Processor always on): 8 mA
  • Serial (RS-232): Active + 5 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 SW1, SW2, and 12V terminals 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.
    • -CELL205 average = 14 mA
    • -CELL210 average = 28 mA
    • -CELL215 average = 14 mA
    • -CELL220 average = 14 mA
    • -CELL225 average = 14 mA
    • -CELL230 average = 23 mA, 26 mA if GPS is on
  • Transfer/Receive:
    • -CELL205 average = 75 mA
    • -CELL210 average = 90 mA
    • -CELL215 average = 75 mA
    • -CELL220 average = 75 mA
    • -CELL225 average = 75 mA
    • -CELL230 average = 50 mA, 53 mA if GPS is on

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 ‑RF452
Transmit < 80 mA 20 mA 650 mA, maximum
Idle On 12 mA 9.5 mA 15 mA, maximum
Idle 0.5 s Power Mode 4 mA 3.5 mA NA
Idle 1 s Power Mode 3 mA 2 mA NA
Idle 4 s Power Mode 1.5 mA 1.5 mA NA

See also Power output.