© National Instruments
|
4-11
National Instruments does
not
recommend the use of single-ended encoders with the smart
camera. This configuration would require the ground for a single-ended encoder to be connected
to the COM pin of the smart camera, and the PhaseA- and PhaseB- signals would be left
unconnected. In this configuration, the system is susceptible to significant noise that would be
eliminated by using a differential encoder.
Shielded encoder cables are recommended for all applications. Unshielded cables are more
susceptible to noise and can corrupt the encoder signals.
Refer to the
, for information about
using a quadrature encoder to delay a trigger.
Figure 4-
shows an example of connecting the quadrature encoder differential line drivers.
Figure 4-8.
Connecting Differential Line Drivers
Ph
as
e A+
Ph
as
e A–
Ph
as
e A–
Ph
as
e A
Ph
as
e B+
Ph
as
e B–
Ph
as
e B–
Ph
as
e B
Encoder
NI
17xx
Twi
s
ted
P
a
ir
Twi
s
ted
P
a
ir
Summary of Contents for NI Vision 17 Series
Page 1: ...ISC 1752...
