Wiring Notes - Allen-Bradley PowerFlex 525 User Manual

Appendix E Encoder/Pulse Train Usage and Position StepLogic Application

Wiring Notes

188
No. Signal
+V A Encoder A
Cm
A- Encoder A (NOT)
B-
B Encoder B
B
B- Encoder B (NOT)
A-
Cm Power Return
A
+V 5...12V Power

Output
12V 5V
(1) When using 12V Encoder power, 24V I/O power, maximum output current at I/O Terminal 11 is 50 mA.
(2) If Encoder requires 24V power, it must be supplied by an external power source.
A quadrature encoder provides rotor speed and direction. Therefore, the
IMPORTANT
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. Drive will fault when an encoder is incorrectly wired and A535 [Motor
Fdbk Type] is set to 5 "Quad Check".
Encoder Wiring Examples
I/O Connection Example
Encoder Power
+12V DC
(250 mA)
– Internal Drive
+V
Power Cm
Common
B-
B
to SHLD
A-
Internal (drive)
A
12V DC, 250mA
Encoder Signal
to Power Supply
Common
– Single-Ended,
+V
Dual Channel
Cm
B NOT
B-
B
B
A NOT
A-
A
A
to SHLD
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, but the pulse train can handle
only 24V inputs. The inputs will automatically adjust to the voltage applied and
no additional drive adjustment is necessary. If a single-channel input is used, it
must be wired between the A (signal) and A- (signal common) channels.
Rockwell Automation Publication 520-UM001A-EN-E - February 2013
Description
Single channel, pulse train or quadrature A input.
Quadrature B input.
Internal power source 250 mA (isolated).
(1)(2)
DIP switch selects 12 or 5 volt power supplied at terminals "+V" and "Cm"
for the encoder.
I/O
Encoder Power
– External
Power Source
Encoder Signal
– Differential,
Dual Channel
Connection Example
to
SHLD
External
Power
Supply
to SHLD
+V
Cm
B NOT
B-
B
B
A NOT
A-
A
A