USER MANUAL : CDS552 CIRRUS LOOP LOGGER
DOCUMENT NAME
CLASSIFICATION
DATE
PAGE
CDS552 CIRRUS LOOP LOGGER USER
MANUAL
CONFIDENTIAL
15-JUL-21
9 OF 29
1.7.1
External Power Supply / Solar System Connection
The CDS552 Cirrus Loop logger can be powered entirely from an external 12V (8-15V) 2A power supply or solar power
source. Using a solar power source and also populating the logger with alkaline batteries means that the logger can be put
into dual mode. In this mode, while there is solar power available, the logger will remain online with the server. Should the
solar power fail, the logger will automatically switch to 'battery' mode until the solar power source is restored. This is ideal
for remote applications where there is no mains power available and streaming data is required.
1.7.2
Using the 4-20mA loop input and 24V loop power generator
The Cirrus Loop logger is equipped with a fully isolated (optical) 4-20mA interface. This interface is configured for 2 wire
applications and should be connected as below. Please take note of the polarity of the loop connections.
