Rockwell Automation 1391ES AC Servo Controller - Manual (Page 31)

Inputs, Outputs and Adjustments
Chapter 5
5-29
Terminal Block - TB4
Drive OK (DROK) Contacts (TB4, Terminals 17, 18)
Application of power to the transformer energizes the logic supply of the
controller. When 90% of rated DC Bus voltage is achieved and no
controller faults are detected, this relay contact is closed. The contact
remains closed until a controller fault occurs or power is removed from the
transformer. Contact rating: 115V AC, 1A or 24V DC, 0.3A. Refer to
Switch Settings – Drive OK/Drive Ready on page 5-35 for further
information.
36V AC Logic Supply Voltage (TB4, Terminals 19, 20, 21)
The isolation transformer contains four separate windings. Each winding
supplies 36V AC with a center tap. The 36V AC leads are brought out to
terminals 19 and 21 of TB4. The center tap must be connected to terminal
20 of TB4. See Chapter 9 for transformer details.
Terminal Block - TB5
Motor Power Terminals (TB5, Terminals 1, 2, 3)
Motor power is provided at these terminals. Refer to Chapter 6 and
Appendix B for connection details.
Input Power Terminals (TB5, Terminals 4, 5, 6)
The controller requires a 230V AC, three-phase, 50 or 60 Hz input supplied
by the transformer secondary. Refer to Chapters 6, 9 and Appendix B for
wiring and transformer information.
External Shunt Regulator Resistor (TB5, Terminals 8, 9, 10)
The 22.5A controllers have provisions to accept an external shunt resistor
to supplement the integral unit. This is available for applications that
require the dissipation of more regenerative energy to the DC Bus. To use
an external shunt resistor, first remove the jumper at terminals 8 and 10 of
TB5. Consult the Allen-Bradley sales office for application assistance.
The shunt regulator resistor supplied with the 1391B-ESAA45 must be
externally mounted and connected to terminals 8 and 9 of TB5 prior to
operation. Refer to Chapter 9 and Appendix B for details.