Isolating Outputs (Galvanic Isolation) - Honeywell EK280 Applications Manual

EK280
Possible correct interconnections:
Isolation amplifiers with common earth:

6.10 Isolating outputs (galvanic isolation)

Usually all negative poles of the outputs are electrically connected to the motherboard.
For special applications such as e.g. switching a positive terminal, each output can be electrically kept
separate from the motherboard and from the other outputs.
In addition, interconnecting devices means that unwanted disturbance via ground loops can take place,
which can be prevented by "isolating" outputs which are correspondingly used in such a manner.
CAUTION!
Reduced battery life
Activation of electrical isolation of outputs reduces battery life when operating the battery.
More information on the influences on battery life can be found in  chapter
isolation (galvanic
i
Galvanic separation of the outputs is not relevant with regard to hazardous areas.
If using the EK280 in hazardous area 1 then a permitted, external separator is required which
is suitable for use in hazardous areas.
i
An electrically isolated output only requires electricity provided that the output is active
(switched on). It is possible to minimize the negative influence of an electrically isolated
output on battery life by setting the pulse duration to as low a value as possible when using
as a pulse output.
The parameterization software enSuite is suitable for this purpose.
To activate the electrical isolation of an output, please push the switch lever behind the relevant output
terminal away from the terminal:
Application Manual
Separate isolation amplifiers for each output
(recommended):
separation).
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10.3.4 Output