Rockwell Automation 7000L PowerFlex 7000 Medium Voltage AC Drive C Frame - Marine - Manual (Page 279)

Component Definition and Maintenance 4-103
7000 ―C‖ Frame - Marine 7000L-UM302B-EN-P – June 2013
Operation at +5V does not allow for long cable lengths. The reason
for this is that it requires the power to be regulated within 5% at the
encoder. Due to the resistance and capacitance of the cable it would
be very hard to keep the power regulated at the encoder to 4.75V.
With longer runs of cable this could drop below the 4.75V and the
encoder would not operate properly. As a general rule, using 18Avg
cabling with an Rdc of 19.3ohm/km the longest cable distance from
the board to the encoder is limited to 12 m (42ft).
The 20B-ENC-1-MX3 encoder option is functionally identical to the
20B-ENC-1 encoder with the addition of conformal coating. Fig xxx
shows the recommended jumper positions for use with the
PowerFlex 7000 Drive
Input Connections:
All encoder interface Connections are made to J1. The connections
are as follows:
J1 Pin 1 A+
J1 Pin 2 A-
J1 Pin 3 B+
J1 Pin 4 B-
J1 Pin 5 Z+
J1 Pin 6 Z-
J1 Pin 7 Encoder Power Return
J1 Pin 8 Encoder Power (+12V @ 3 Watts)
80190-759-01, 80190-759-02 Universal Encoder Interface
The Universal Encoder Interface allows the drive to be connected to
an absolute position encoder or a standard quadrature encoder and
also provides the option for dual or redundant quadrature encoders.
The Universal Encoder Interface provides 12 single ended or 6
differential, optically isolated inputs as well as a 12V/3Watt
galvanically isolated encoder power source. When using absolute
encoders the 12 single ended inputs are used. For quadrature
encoders the 6 differential inputs are used.
Either type of encoder with frequencies up to 200 Khz, can be
interfaced to the Universal Encoder Interface.