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)

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)

**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

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