Power connection

Connect the power supply to the removable Power connector on the side of the Spectrum. Power supplies providing voltages from 10 to 30 VDC may be used.

• While the input power requirements of Campbell Scientific instruments vary, there is one constant – they all run on 12 VDC. To keep things simple, we only discuss the use of 12 VDC power supplies in this manual.

• Do not connect energized wires to an instrument. All connections discussed assume de-energized wires. Switch off power supplies before making connections.

• Double check the polarity of connections before switching on power supplies.

Power-up sequence

Best practice is to start all instruments in a station simultaneously from a single power supply. If this is not possible, first turn on Spectrums and then the data logger. This procedure will reduce the time required to synchronize the CPI bus.

See COMM status LED for more information.