Specifications

7900-230 Unregulated Power Distribution Module

Voltage In/Out: 10 to 30 VDC

Maximum Current Load: 10 Amps

Operating Temperature Range: -40 to 50 °C

Weight: 3.0 lbs (1.36 kg)

Dimensions: 9 15/16 in x 5 15/16 in x 4 1/2 in (25.3 cm x 15.1 cm x 11.4 cm)

Frontal Area: 59.0 in2 (380.6 cm2)

7900-232 Input Wire: 20 m (65.6 ft) 10 AWG (5.26 mm2) copper wire in 1/2" flexible aluminum conduit

7900-233 Input Wire: 40 m (131 ft) 12 AWG (3.31 mm2) insulated copper wire, no conduit

Compatible Output Wire Gauge: 10 to 26 AWG (0.13 to 5.26 mm2)

7900-231 Regulated Power Distribution Module

Voltage In: 10 to 30 VDC

Unregulated Voltage Output: Equal to input

Regulated Output Voltage: 12VDC; 2A max.

Maximum Current Load: 10 Amps (including charge controller load)

Operating Temperature Range: -20 to 50 °C

Weight: 3.5 lbs (1.6 kg)

Dimensions: 9 15/16 in x 5 15/16 in x 4 1/2 in (25.3 cm x 15.1 cm x 11.4 cm)

Frontal Area: 59.0 in2 (380.6 cm2)

7900-232 Input Wire: 20 m (65.6 ft) 10 AWG (5.26 mm2) insulated copper wire in 1/2" flexible aluminum conduit

7900-233 Input Wire: 40 m (131 ft) 12 AWG (3.31 mm2) insulated copper wire, no conduit

Unregulated Outputs Wire Gauges: 10 to 26 AWG (0.13 to 5.26 mm2)

Regulated Outputs Wire Gauges: 16 to 28 AWG (0.081 to 1.31 mm2)

Analyzer Power Requirements

Table A‑1. Voltage limits for instruments in LI-COR eddy covariance systems.
Sensor Input Voltage
LI-7500DS Open Path CO2/H2O Analyzer 10.5 to 30 VDC
LI-7500A/RS Open Path CO2/H2O Analyzer 10.5 to 30 VDC
LI-7200/RS Enclosed CO2/H2O Analyzer 10.5 to 30 VDC
SmartFlux System 10.5 to 30 VDC
7200-101 Flow Module 10.5 to 30 VDC
LI-7700 Open Path CH4 Analyzer 10.5 to 30 VDC
Biomet System 10 to 16 VDC
Cellular Communications and Telemetry Devices (cellular modem and Ethernet switch) 10 to 28 VDC
Hughes Satellite Radio 12/24 VDC
LI-840A or LI-820 Gas Analyzers 12 to 30 VDC
Sonic Anemometers  
Gill WindMaster™ 9 to 30 VDC
Gill WindMaster™ Pro 9 to 30 VDC
Gill R3-50™ or R3-100™ 9 to 30 VDC
Gill HS-50™ or HS-100™ 9 to 30 VDC
Gill PCI Unit 8 to 15 VDC
Campbell Scientific® CSAT3 10 to 16 VDC
Dataloggers  
CR1000 or CR3000 Datalogger 9.6 to 16 VDC
CR6 Datalogger 16 to 32 VDC

Interior Labels

The power distribution box labels are reproduced below. Be mindful of the warnings and suggestions on the label.

7900‑230 Label

7900-231 Label