Rockwell Automation 1391 USER MNL/DIGITAL AC SERVO DR - Manual (Page 67)

Chapter 7
Installation
7-6
Motor Feedback Wiring
Connections to the integral commutation resolver must be made using an
Allen-Bradley 1326-CFUxx shielded cable.
ATTENTION: To guard against hazard of personal injury or
damage to equipment, the interconnections to the motor and
resolver must be made exactly as shown in Appendix B. Failure
to do so could cause loss of motor control and/or severe
oscillation of the motor shaft.
!
Encoder (A Quad B Board) Wiring
Recommended Wire – Belden #9728 or equivalent. Maximum distance
between the A Quad B Board and the position controller is 40 feet (12.2
meters) using a 5 volt signal. For distances up to 300 feet (91 meters), 18
AWG wire (0.75 mm
2 ), such as Belden #9388 (or equivalent) and an 8 to
15V DC power supply must be used.
For proper operation when interconnecting to IMC products, the B and
B (NOT) signals must be reversed.
Applications that interface the 1391-DES with an IMC Classic Controller
(IMC 110, 120, 121, 123) require a relay to sequence the encoder power
supply during a drive shutdown.
Without this power supply relay, erroneous counts could be received by the
IMC Classic Controller when AC power is cycled to the drive, but not the
controller. When power is removed to the drive, the AQB Board will not
have control voltage. However, the board will still receive the encoder
voltage (+5V DC or +8-15V DC) from the IMC Classic Controller. As the
drive power is cycled, it will briefly output a stream of encoder pulses
which will be interpreted as movement of the servomotor by the IMC
Classic Controller.
It is recommended that a normally open (N.O.) contact from an external
relay be wired in series with the encoder voltage going to the drive from
the IMC Classic Controller. The relay coil must be wired into the control
circuit. When power is not applied to the drive, a Quadrature Fault will
occur in the controller, forcing a re-homing and calibration of the
controller.
Transformer Wiring
The transformer secondary (230V AC, three-phase) connection to the drive
is phase insensitive and is shown in Appendix B. The maximum wire size
TB5 will accept is 8 AWG (6 mm
2 ). Refer to Chapter 10 for the
transformer wiring diagrams.
The minimum recommended wire sizes for the transformer secondary are
shown in Table 7.B.