Connecting Encoders
The input and index signals of one encoder must use the same
encoder channel of the DS1103. If you do not use all input channels,
you do not have to connect any pins of the unused channels.
Objective
To allow proper operation, do not connect the outputs of your
encoder to an AC-coupling network. The input signals must be DC
signals. Otherwise, PHI0 and PHI90 would simultaneously be zero if
your encoder stopped, which would falsify encoder line counting.
General
If your encoder provides differential signals (RS422, 1 V
pp
, or 11 μA
pp
signals), connect:
n The encoder output signals to the PHI0, PHI90 and IDX pins of the
corresponding input channel.
n The inverted signals to the PHI0, PHI90 and IDX pins of the
corresponding input channel.
Encoder providing
differential signals
GND
Incremental encoderDS1103
GND
PHI0 PHI0
PHI90
IDXIDX
PHI90
VSupply
VCC
PHI0
PHI90
IDX IDX
PHI90
PHI0
(optional)
s
Signal Connection to External Devices
t
182
s
DS1103 Hardware Installation and Configuration November 2014
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