Campbell CR310 - Page 257

Charger Input (CHG+ and CHG- terminals):
l
16 to 32 VDC
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Current limited to 0.9 A maximum
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Power converter or solar panel input
External Batteries (BAT+ and BAT- terminals):
l
10 to 18 VDC input
l
12 VDC, lead-acid 7 Ah battery, typical
Internal Lithium Battery (see Internal battery(p. 162) 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.
l
Idle: 1.5mA
l
Active 1 Hz scan w/ one analog measurement: 5mA
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CR300 Active (Processor always on): 23mA
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CR310 Active (Processor always on): 36mA
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Serial(RS-232): Active + 5mA
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Ethernet power requirements (CR310 Only):

o
Ethernet idle: Active + 5mA
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o
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:
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Idle: Connected to network, no data transfer.

o
-CELL200 average = 10 mA

o
-CELL205 average = 14 mA

o
-CELL210 average = 28 mA

o
-CELL215 average = 14 mA

o
-CELL220 average = 14 mA

o
-CELL225 average = 14 mA
l
Transfer/Receive:

o
-CELL200 average = 105 mA

o
-CELL205 average = 75 mA

o
-CELL210 average = 90 mA
24. CR300 series specifications241