USER MANUAL : CDS552 CIRRUS LOOP LOGGER
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CDS552 CIRRUS LOOP LOGGER USER
MANUAL
CONFIDENTIAL
15-JUL-21
10 OF 29
To assist with the powering of loop devices, the Cirrus Loop logger is equipped with an onboard 24V loop power generator.
This generator is designed to provide the power for devices that source this directly off the loop. Since the maximum power
to flow on a 4-20mA loop, should be 20mA, the generator has been designed to supply a maximum of 30mA. Please note,
using the 24V power generator to power a loop device uses a substantial amount of power. For this reason, in battery
operated devices, the loop should only be powered each time the device needs to be read. This can be achieved by setting
the generator into 'Loop Power' mode.
Example configuration of the generator supplying power to a loop powered device
1.7.3
Using the pulse inputs
Onboard the Cirrus Loop logger are 2 pulse inputs. Pulse inputs are used by metering type devices (eg water or energy
meter) to measure consumption.
Example configuration of water meter with a volt free switch (e.g. reedswitch)
