Reference
Analog Relay Mux Board
Figure 1-9. Gain Selection.
_______________________
GAIN Gain Selected
______ ____________
ÚÄÄ¿
³ÛÛ³
Gain 1
DEFAULT
ÀÄÄÙ
ÚÄÄ¿
³þÛ³
Gain 10
ÀÄÄÙ
ÚÄÄ¿
³Ûþ³
Gain 100
ÀÄÄÙ
ÚÄÄ¿
³þþ³
Gain 1000
ÀÄÄÙ
Pull Up/ Pull Down- Open Circuit Detection.
______________________________________
_
Open circuit inputs can be detected by the installation of
resistors to pull the differential input lines to a known state
The two VOPT jumpers can pull the INPUT+ line, via a 100k
resistor R13, to isolated grounds or to the is15volt
supply. To disconnect this pull up/down remove both jumpers.
Resistor R14 pull the INPUT- line to the isolated ground level in
the event of floating inputs. To disconnect this pull down
remove R14.
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