Hach-Lange SI794 D User Manual - Manual (Page 59)

External switchover of parameter sets
The parameter set can be selected from outside by sending a
signal to the Control input (e.g. from the process control system).
To do so, Ctr-EXT is set during configuration.
Note:
Parameter set 2 is indicated by “88” in the upper left corner of the
display.
With Control input Ctr-EXT selected:
You can switch between the parameter
sets by applying an external signal to
the Control input (see below).
Display Action Choices
0 ... 2 V AC/DC Parameter set 1 selected
10 ... 30 V AC/DC Parameter set 2 selected
7
8
Control
input
si794 Process control system
Power supply
12...24 V AC/DC
59