Omega ISA- BUS MULTI-FUNCTIONAL BOARD OME-A822PG - Manual (Page 23)

OME-A-822PGH GAIN CONTROL CODE TABLE
BI/UN Settling Time GAIN Input Range
GAIN3 GAIN2 GAIN1 GAIN0
BI 23 us 1 +/- 5V 0 0 0 0
BI 28 us 10 +/- 0.5V 0 0 0 1
BI 140 us 100 +/- 0.05V 0 0 1 0
BI 1300 us 1000 +/- 0.005V 0 0 1 1
UNI 23 us 1 0 to 10V 0 1 0 0
UNI 28 us 10 0 to 1V 0 1 0 1
UNI 140 us 100 0 to 0.1V 0 1 1 0
UNI 1300 us 1000 0 to 0.01V 0 1 1 1
BI 23 us 0.5 +/- 10V 1 0 0 0
BI 28 us 5 +/- 1V 1 0 0 1
BI 140 us 50 +/- 0.1V 1 0 1 0
BI 1300 us 500 +/- 0.01V 1 0 1 1
BI=Bipolar, UNI=Unipolar, X=don‘t care, N/A=not available
2.4.7 A/D Multiplex Control Register
(WRITE) Base+A : A/D Multilexer Control Register Format
Bit 7
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
X X X X D3 D2 D1 D0
A/D input channel selection data = 4 bits : D3..D0, D3=MSB, D0=LSB, X=don‘t care
Single-ended mode : D3..D0
Differential mode : D2..D0, D3=don’t care
The OME-A-822PGL/PGH provides 16 single-ended or 8 differential analog input signals.
In single-ended mode, D3..D0 selects the active channel. In differential mode, D2..D0 selects
the active channel and (D3 has no affect).
NOTE: The settling time of the multiplexer depends on the resistance.of the input
sources.
source resistance = about 0.1K ohm Æ settling time = about 3 us.
source resistance = about 1K ohm Æ settling time = about 5 us.
source resistance = about 10K ohm Æ settling time = about 10 us.
source resistance = about 100K ohm Æ settling time = about 100 us.
OME-A-822PGL/PGH Hardware Manual ---- 21