svn://software/hardware/LC4D/100218/docs/LC4D_MAN.doc
MRR
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Analog Inputs
Five analog inputs are available to capture data from the axis and spindle drives. The analog inputs have
a range of -10 to 10V and convert to a 12 bit signed value.
-
+
Analog In put
ADC
GROUND
-1 2 VDC
Internal Circuitry Equivalent
Analog Input
Analog Ground
>1 0k
+1 2 VDC
Analog Input Calculations
The analog input uses a 12 bit analog to digital converter (ADC) to generate a digital result from an
analog signal. The 12 bit ADC allows a result of -2048 to 2047, which corresponds to -10 to 9.995 volts. The
ADC is factory trimmed for optimum accuracy and requires no further adjustment.
Analog Input Wiring
The analog inputs should be wired using shielded twisted pairs for best results. Analog input terminals
are paired with common terminals for direct wiring of the signal, common, and shield. In most cases, it is best
to connect the shield to the common only at the Oak headers. Routing analog cables away from power wires
and other noise sources is also critical for good performance. See “Oak Connections” section for terminal
locations.
Summary of Contents for OAK
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