USER MANUAL :
DOCUMENT NAME
1.7.1
External Power Supply / Solar System
The CDS551 Cirrus Modbus logger can be powered entirely from an external 12V (8
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 id
for remote applications where there is no mains power available and streaming data is required.
1.7.2
Using the 4-20mA loop input
The Cirrus Modbus logger is equipped with a fully isolated (optical) 4
applications and should be connected as below. Please take note of the polarity of the loop connections.
To assist with the powering of loop devices, the
generator. This generator is designed to provide the power for devices that source this directly off the loop
maximum power to flow on a 4-20mA loop, should be 2
30mA. Please note, using the 24V power generator to power a loop device
MANUAL : CDS551 CIRRUS MODBUS LOGGER
NAME
CLASSIFICATION
DATE
PAGE
External Power Supply / Solar System Connection
logger can be powered entirely from an external 12V (8-15V) 2A power supply or solar p
Using a solar power source and also populating the logger with alkaline batteries means that the logger can be put
e 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 id
mains power available and streaming data is required.
20mA loop input and 24V loop power generator
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.
es, the Cirrus Modbus logger is equipped with an onboard 24V loop power
to provide the power for devices that source this directly off the loop
loop, should be 20mA, the generator has been designed to supply a maximum of
enerator to power a loop device uses a substantial amo
PAGE
power supply or solar power
Using a solar power source and also populating the logger with alkaline batteries means that the logger can be put
e 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
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.
logger is equipped with an onboard 24V loop power
to provide the power for devices that source this directly off the loop. Since the
gned to supply a maximum of
uses a substantial amount of power. For this
