Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C-Frame) - ForGe Control User Manual
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Rockwell Automation Publication 7000L-UM301D-EN-P - June 2014
Chapter 5
Component Definition and Maintenance
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.
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.
The 80190-759-02 Universal Encoder Interface is functionally identical to the
80190-759-01 with the addition of conformal coating. The Universal Encoder
interface is configured via jumpers installed on the 12-position header J4. The
header has three positions labeled “Park” and used to store the jumpers when
indicated as “Removed” in the table below. Each function is selected by moving
its corresponding jumper from the “park” location to the selected function
location if labeled “Installed”. The following table describes the functions
available.
ATTENTION: Removing the Universal Encoder Interface while control power is
applied may result in damage to the board. Only remove the board when the
control power is Off.