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7.2 ANALOG OUTPUT OPT4500/mA AND V
7.2.1 – Introduction
Two ranges of analogue output (0 to 10) V and (4 to 20) mA can
be incorporated into the DM4500, either the OPT4500/v option for
voltage output or the OPT4500/mA option for current output. Note:
Both cards cannot be used simultaneously.
The outputs are isolated with respect to the signal input and the
power supply. The option board provides a two terminal connector
[(+) and (-)] that drives out a signal variation from (0 to 10) V or
from (4 to 20) mA proportional to a user-defined display range.
The instrument will detect the type of option that has been installed
and will operate accordingly. The display values producing the full
scale output (OUT-HI and OUT-LO) are also introduced via front-
panel buttons in the same programming module. The analogue
output then follows the display variation between the HI and LO
programmed points.
The output signal can be set up for reverse action by programming
the low display for the high output (OUT-HI) and the high display
for the low output (OUT-LO).