Specifications

Rockwell Automation Publication PFLEX-AP009A-EN-P - September 2012 81
Drive Comparisons Chapter 1
PowerFlex DC - Armature Voltage Feedback Connections
When a DC output contactor or inverting fault breaker/fuse is used with the
drive, and a speed feedback device (tachometer or encoder) is not used, the
Armature Voltage Feedback terminals can be used to monitor the armature
voltage at the motor regardless of the state of the contactor or inverting fault
device. When this terminal block is not connected to the motor armature
terminals, the terminals must be jumpered (as described in the table below) and
the armature voltage feedback is monitored internally within the drive. In this
case, when a DC contactor is used with the drive, a speed feedback device is not
used, and the contactor opens, the drive will no longer receive the armature
voltage feedback signal.
Note that this terminal block is not present on drives shipped from the factory
prior to those with v3.001 firmware installed. However, new Pulse Transformer
boards shipped as replacement parts from the factory will contain this terminal
block and can be used with any version of firmware.
PowerFlex DC Armature Voltage Feedback Circuit Wire Sizes and Terminal Specifications
IMPORTANT
By default, these terminals are jumpered - 1A1 to A1 and 1A2 to A2. If these
terminals are not wired to the motor terminals, the jumpers must be installed.
Terminal Description
1A1 Jumpered to A1 when internal armature voltage feedback is used.
Not used when A1 is connected to motor terminal A1.
A1 Voltage feedback from motor terminal A1.
1A2 Jumpered to A2 when internal armature voltage feedback is used.
Not used when A2 is connected to motor terminal A2.
A2 Voltage feedback from motor terminal A2.
Frame Terminals Wire Size and Type
(1)
(1) Wire with an insulation rating of 600V or greater is recommended. See “Cable and Wiring
Recommendations” in the PowerFlex Digital DC Drive User Manual, publication 20P-UM001
, for
cable spacing information.
Tightening Torque
N
•m (lb•in)
A, B & C 1A1, A1, 1A2, A2 24…10 AWG/kcmils 0.5…0.6 (4.4…5.3)
D 22…8 AWG/kcmils 0.8…1.6 (7.1…14.2)