Allen-Bradley PowerFlex 527, User Manual

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170 Rockwell Automation Publication 520-UM002B-EN-E - December 2017
Appendix D Encoder Option Card Usage
Wiring Notes The encoder option card can supply 5V or 12V power (250 mA maximum) for
an encoder. Be sure the DIP switch is set properly for the encoder. In general, 12V
will provide higher noise immunity.
The encoder can handle 5V, 12V, or 24V inputs. The inputs will automatically
adjust to the voltage applied and no additional drive adjustment is necessary.
Encoder Wiring Examples
I/O Connection Example I/O Connection Example
Encoder Power
– Internal Drive
Power
Internal (drive)
12V DC, 250mA
Encoder Power
– External
Power Source
Encoder Signal
– Single-Ended,
Dual Channel Encoder Signal
– Differential,
Dual Channel
Common
+12V DC
(250 mA)
A
A-
B
B-
Z
Z -
Cm
+V
to SHLD
+
Common
External
Power
Supply
to
SHLD
Marker Z
A
B
Marker
Z NOT
to SHLD
to Power Supply
Common
A
A-
B
B-
Z
Z -
Cm
+V
to SHLD
A NOT
B
A
B NOT
Marker
Z NOT
Marker Z
A
A-
B
B-
Z
Z -
Cm
+V
IMPORTANT
A quadrature encoder provides rotor speed and direction. Therefore, the
encoder must be wired such that the forward direction matches the motor
forward direction. If the drive is reading encoder speed but the position
regulator or other encoder function is not working properly, remove power to
the drive and swap the A and A (NOT) encoder channels or swap any two motor
leads.