Accelnet Plus Micro Modules User Guide
16-01687 Rev 03
Copley Controls
Page 85 of 139
Quad A/B Incremental Encoder
Encoders with differential line-driver
outputs are required (single-ended
encoders are not supported) and
provide incremental position feedback
via the A/B signals and the optional
index signal (X) gives a once per
revolution position mark. The
MAX3097 receiver has differential
inputs with fault protections for the
following conditions:
Quad Encoder with Index
Signal Loss Detection Logic
ENC
ENC
ENC
ENC
P1 AEZ, APZ
A
5V
0V
SGN D
ENCA
ENCA
A
5 V E N C 1 (2 )
2 AEV, APV
M A 3 3 6 2
G
M A 3 2 1
1 2 1
1 2 1
5
1 3 0
M A 3 3 6 2
1 k
1 k
ENC
ENC
P1 AEZ, APZ
A
5V
0V
SGN D
I N 6
M A 3 0 7
ENCA
ENCA
A
5 V E N C 1 (2 )
2 AEV, APV
M A 3 3 6 2
G
M A 3 2 1
1 2 1
1 2 1
Condition
Example
Line-line shorts A shorted to /A
Open-circuits: A disconnected, /A connected.
Terminator resistor pulls A & /A
together
for a cable short-circuit fault
Low-voltage
Va -
Vb ≤ 200 mV, or ≥
-200 mV
Encoder power loss, cabling, etc.